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Cheap flights from Ontario (ONT) to Chicago (CHI) from $63

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/31. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ONT — CHI
May 20 — May 271
From?
To?
Mon 5/20
Mon 5/27
1 adult, Economy
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The best prices from Ontario to Chicago are usually found in November or October, booked 25 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Cheap flight deals from Ontario to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Chicago (CHI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 15, 2024.

Popular in

July

Cheapest in

November

Round-trip from

$223

One-way from

$63
High demand for flights, 17% potential price rise
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Best time to find cheap flights, 18% potential price drop
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From Ontario to Chicago (CHI)
Search Deals
One-way flight from Ontario to Chicago (CHI)
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What is the cheapest day to fly round-trip from Ontario to Chicago?

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 30% when planning your travel around this day of the week.

How far in advance should I book a flight from Ontario to Chicago?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 31 days in advance, which can save you up to 73% on flights from Ontario to Chicago compared to booking the week you need them. Waiting 31 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $319. For sooner than that we have options available in the next 3 days from $510.

What is the cheapest month to fly from Ontario to Chicago?

Due to multiple factors, expect to potentially pay more when booking in March. For low rates, January can be a great choice for travel to Chicago. Flights to Chicago from Ontario in January are about $314 on average during January, but can be found for as low as $135.

When is the cheapest time to fly from Ontario to Chicago (ONT - CHI)?

Unlike at noon, when flights are generally more expensive, you can save up to 22% on flights from Ontario to Chicago by exploring options for tickets in the afternoon.

Cheap Frontier flights from Ontario to Chicago

Explore cheap flight options specifically provided by Frontier for the route between Ontario and Chicago. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 15, 2024.
Peruse some of the lowest-priced Frontier flights we've found from Ontario to Chicago. Make sure to check back often as deals are often changing.
Tue 5/2812:59 amONT - ORD
1 stop22h 14mFrontier
Wed 6/128:23 pmORD - ONT
1 stop12h 40mFrontier
Deal found 5/14$136
Tue 5/2812:59 amONT - ORD
1 stop22h 14mFrontier
Wed 6/58:23 pmORD - ONT
1 stop12h 40mFrontier
Deal found 5/13$137
Sat 6/82:29 pmONT - ORD
1 stop13h 08mFrontier
Wed 6/129:53 pmORD - ONT
1 stop28h 06mFrontier
Deal found 5/13$138
Tue 8/1312:49 amONT - ORD
1 stop22h 14mFrontier
Mon 8/196:48 pmORD - ONT
1 stop19h 44mFrontier
Deal found 5/15$139
Tue 6/48:29 pmONT - ORD
1 stop6h 31mFrontier
Wed 6/58:23 pmORD - ONT
1 stop12h 40mFrontier
Deal found 5/14$140
Sat 6/15:41 pmONT - ORD
1 stop9h 19mFrontier
Wed 6/58:23 pmORD - ONT
1 stop12h 40mFrontier
Deal found 5/13$141
Sat 6/112:59 amONT - ORD
1 stop19h 36mFrontier
Wed 6/129:53 pmORD - ONT
1 stop28h 06mFrontier
Deal found 5/13$142
Tue 5/2112:59 amONT - ORD
1 stop22h 14mFrontier
Wed 5/297:59 pmORD - ONT
1 stop15h 35mFrontier
Deal found 5/13$143
Sat 5/255:41 pmONT - ORD
1 stop9h 19mFrontier
Tue 5/287:59 pmORD - ONT
1 stop22h 06mFrontier
Deal found 5/14$144

Cheap Delta flights from Ontario to Chicago

Explore cheap flight options specifically provided by Delta for the route between Ontario and Chicago. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 15, 2024.
Browse through some of the cheapest Delta flights traveling from Ontario to Chicago. Check back soon if you're not seeing flights that suit your needs.
Wed 5/296:50 amONT - ORD
1 stop10h 51mDelta
Wed 6/121:25 pmORD - ONT
2 stops11h 35mDelta
Deal found 5/14$284
Wed 5/296:42 pmONT - MDW
2 stops12h 05mDelta
Wed 6/121:24 pmMDW - ONT
2 stops11h 36mDelta
Deal found 5/14$289
Sat 5/255:45 amONT - ORD
2 stops9h 04mDelta
Thu 5/303:50 pmORD - ONT
2 stops9h 53mDelta
Deal found 5/14$332
Sun 5/265:45 amONT - ORD
2 stops9h 04mDelta
Tue 6/45:40 amORD - ONT
1 stop8h 00mDelta
Deal found 5/14$345
Sat 5/255:45 amONT - ORD
2 stops9h 04mDelta
Tue 5/287:45 amORD - ONT
1 stop6h 28mDelta
Deal found 5/14$405
Fri 5/176:42 pmONT - MDW
2 stops14h 20mDelta
Tue 5/219:32 amMDW - ONT
2 stops12h 34mDelta
Deal found 5/14$410
Mon 5/276:00 amONT - ORD
1 stop8h 47mDelta
Tue 6/45:40 amORD - ONT
1 stop8h 00mDelta
Deal found 5/14$416
Sat 5/181:20 pmONT - ORD
1 stop6h 38mDelta
Tue 5/217:45 amORD - ONT
1 stop6h 28mDelta
Deal found 5/14$478
Thu 5/231:20 pmONT - ORD
1 stop6h 12mDelta
Sun 5/266:07 amORD - ONT
2 stops8h 06mDelta
Deal found 5/14$483

Cheap Ontario to Chicago flights in May & June 2024

Find cheap flight options from Ontario to Chicago specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,632,958 searches. Prices were last updated on May 15, 2024.
Listed are some of the best fares we've found on flights departing from Ontario to Chicago in 2024. More deals are always being added, so be sure to check back regularly.
Tue 5/2112:59 amONT - MDW
1 stop8h 10mFrontier
Tue 6/49:10 pmMDW - ONT
1 stop14h 19mFrontier
Deal found 5/14$136
Tue 5/2112:59 amONT - ORD
1 stop22h 14mFrontier
Tue 6/47:59 pmORD - ONT
1 stop23h 49mFrontier
Deal found 5/14$136
Tue 5/2112:59 amONT - MDW
1 stop8h 10mFrontier
Tue 5/289:10 pmMDW - ONT
1 stop13h 54mFrontier
Deal found 5/15$137
Tue 5/2812:59 amONT - ORD
1 stop22h 14mFrontier
Wed 6/58:23 pmORD - ONT
1 stop12h 40mFrontier
Deal found 5/13$137
Sat 6/82:29 pmONT - ORD
1 stop13h 08mFrontier
Wed 6/129:53 pmORD - ONT
1 stop28h 06mFrontier
Deal found 5/13$138
Tue 5/212:25 pmONT - MDW
1 stop18h 44mFrontier
Sat 6/158:50 pmMDW - ONT
1 stop12h 13mFrontier
Deal found 5/14$139
Mon 6/1012:59 amONT - MDW
1 stop10h 10mFrontier
Sat 6/158:50 pmMDW - ONT
1 stop12h 13mFrontier
Deal found 5/14$140
Tue 6/48:29 pmONT - ORD
1 stop6h 31mFrontier
Wed 6/58:23 pmORD - ONT
1 stop12h 40mFrontier
Deal found 5/14$140
Sat 6/110:10 pmONT - MDW
1 stop5h 40mFrontier
Tue 6/49:10 pmMDW - ONT
1 stop14h 19mFrontier
Deal found 5/13$141

Ontario to Chicago 2024 flight deals

Discover exclusive flight deals for travel between Ontario and Chicago in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 15, 2024.
Listed are some of the best fares we've found on flights departing from Ontario to Chicago in 2024. More deals are always being added, so be sure to check back regularly.
Tue 5/2112:59 amONT - MDW
1 stop8h 10mFrontier
Tue 6/49:10 pmMDW - ONT
1 stop14h 19mFrontier
Deal found 5/14$136
Tue 5/2112:59 amONT - ORD
1 stop22h 14mFrontier
Tue 6/47:59 pmORD - ONT
1 stop23h 49mFrontier
Deal found 5/14$136
Tue 5/2112:59 amONT - MDW
1 stop8h 10mFrontier
Tue 5/289:10 pmMDW - ONT
1 stop13h 54mFrontier
Deal found 5/15$137
Tue 5/2812:59 amONT - ORD
1 stop22h 14mFrontier
Wed 6/58:23 pmORD - ONT
1 stop12h 40mFrontier
Deal found 5/13$137
Sat 6/82:29 pmONT - ORD
1 stop13h 08mFrontier
Wed 6/129:53 pmORD - ONT
1 stop28h 06mFrontier
Deal found 5/13$138
Tue 5/212:25 pmONT - MDW
1 stop18h 44mFrontier
Sat 6/158:50 pmMDW - ONT
1 stop12h 13mFrontier
Deal found 5/14$139
Tue 8/1312:49 amONT - ORD
1 stop22h 14mFrontier
Mon 8/196:48 pmORD - ONT
1 stop19h 44mFrontier
Deal found 5/15$139
Mon 6/1012:59 amONT - MDW
1 stop10h 10mFrontier
Sat 6/158:50 pmMDW - ONT
1 stop12h 13mFrontier
Deal found 5/14$140
Tue 6/48:29 pmONT - ORD
1 stop6h 31mFrontier
Wed 6/58:23 pmORD - ONT
1 stop12h 40mFrontier
Deal found 5/14$140

Ontario to Chicago flights leaving soon

Find last-minute flight options from Ontario to Chicago for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 15, 2024.
Have a look at some of the last-minute flights available departing from Ontario to Chicago. To prevent any unwanted surprises, users should verify their flight info before booking.
Tue 5/2112:59 amONT - MDW
1 stop8h 10mFrontier
Tue 6/49:10 pmMDW - ONT
1 stop14h 19mFrontier
Deal found 5/14$136
Tue 5/2112:59 amONT - ORD
1 stop22h 14mFrontier
Tue 6/47:59 pmORD - ONT
1 stop23h 49mFrontier
Deal found 5/14$136
Tue 5/212:25 pmONT - MDW
1 stop18h 44mFrontier
Tue 5/289:10 pmMDW - ONT
1 stop13h 54mFrontier
Deal found 5/14$137
Tue 5/2812:59 amONT - ORD
1 stop22h 14mFrontier
Wed 6/58:23 pmORD - ONT
1 stop12h 40mFrontier
Deal found 5/13$137
Tue 5/212:25 pmONT - MDW
1 stop18h 44mFrontier
Sat 6/158:50 pmMDW - ONT
1 stop12h 13mFrontier
Deal found 5/14$139
Tue 5/2112:59 amONT - MDW
1 stop8h 10mFrontier
Wed 5/299:10 pmMDW - ONT
1 stop12h 14mFrontier
Deal found 5/13$140
Tue 5/2112:59 amONT - ORD
1 stop22h 14mFrontier
Sat 5/257:59 pmORD - ONT
1 stop13h 30mFrontier
Deal found 5/14$141
Wed 5/227:45 pmONT - MDW
1 stop8h 05mFrontier
Tue 6/49:10 pmMDW - ONT
1 stop18h 05mFrontier
Deal found 5/14$142
Sat 5/2510:10 pmONT - MDW
1 stop5h 40mFrontier
Sat 6/19:05 pmMDW - ONT
1 stop12h 29mFrontier
Deal found 5/14$143

One-way flights to Chicago from Ontario

Search for one-way flight options from Ontario to Chicago. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 15, 2024.
Some of the best available deals we've found on one-way flights from Ontario to Chicago. Users in need of a round-trip flight from Ontario to Chicago instead should update the search form at the top of page.
Fri 5/3112:59 amONT - MDW
1 stop8h 14mFrontier
Deal found 5/14$63
Wed 5/292:35 pmONT - ORD
1 stop8h 38mFrontier
Deal found 5/14$63
Wed 5/297:45 pmONT - MDW
1 stop8h 05mFrontier
Deal found 5/14$70
Tue 6/48:29 pmONT - ORD
1 stop6h 31mFrontier
Deal found 5/14$70
Tue 5/2112:59 amONT - MDW
1 stop8h 10mFrontier
Deal found 5/14$71
Tue 6/48:29 pmONT - ORD
1 stop6h 31mFrontier
Deal found 5/14$71
Fri 7/1212:49 amONT - MDW
1 stop8h 31mFrontier
Deal found 5/14$72
Mon 7/88:35 pmONT - MDW
1 stop7h 58mFrontier
Deal found 5/13$73
Mon 8/198:35 pmONT - ORD
1 stop6h 12mFrontier
Deal found 5/14$73

Find flights from Ontario to Chicago within your budget

Customize your flight search to find flights from Ontario to Chicago that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 15, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$136 - $284

Route

Depart

Return

Price

OntarioChicago Midway

ONT - MDW

ONTMDW

Ontario

Tue 5/28

1 stop8h 10m

Chicago Midway

Wed 6/12

1 stop12h 05m

$136

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Tue 5/28

1 stop22h 14m

Chicago O'Hare Intl

Wed 6/12

1 stop12h 40m

$136

OntarioChicago Midway

ONT - MDW

ONTMDW

Ontario

Tue 5/28

1 stop8h 10m

Chicago Midway

Tue 6/4

1 stop14h 19m

$137

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Tue 5/28

1 stop22h 14m

Chicago O'Hare Intl

Wed 6/5

1 stop12h 40m

$137

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Sat 6/8

1 stop13h 08m

Chicago O'Hare Intl

Wed 6/12

1 stop28h 06m

$138

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Tue 8/13

1 stop22h 14m

Chicago O'Hare Intl

Mon 8/19

1 stop19h 44m

$139

OntarioChicago Midway

ONT - MDW

ONTMDW

Ontario

Mon 6/10

1 stop10h 10m

Chicago Midway

Sat 6/15

1 stop12h 13m

$140

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Thu 6/6

1 stop6h 02m

Chicago O'Hare Intl

Tue 6/11

2 stops17h 58m

$278

OntarioChicago Midway

ONT - MDW

ONTMDW

Ontario

Wed 5/29

1 stop7h 11m

Chicago Midway

Wed 6/12

2 stops11h 36m

$284

Flights are sorted by cheapest first

Deals found on 5/14

When is the best time to book a flight from Ontario to Chicago?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Chicago. Price data was last updated on May 10, 2024.
The best time to book flights from Ontario to Chicago is 25 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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When is the cheapest time to fly from Ontario to Chicago?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Chicago. Price data was last updated on May 12, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Ontario to Chicago flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
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Average price of flights to Chicago by month

Plan your trip from Ontario to Chicago by taking into account the cheapest months to travel. The average price of a one-way flight from Ontario to Chicago is currently $70 while a round-trip flight costs $169. Price data was last updated on May 12, 2024.

Currently, February is the cheapest month in which you can book a flight from Ontario to Chicago (average of $244). Flying from Ontario to Chicago in June is currently the most expensive (average of $342). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$248

February

$244

March

$280

April

$258

May

$278

June

$342

July

$327

August

$274

September

$258

October

$248

November

$270

December

$248

Temperature and rainfall in Chicago by month

Plan your trip to Chicago by taking into account the average temperature and rainfall totals by month.

CHI

Temperature

23 - 73.4 °F

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Chicago. Reviews last updated May 15, 2024.
To help decide which airline to fly from Ontario to Chicago, see what other customers have to say about Frontier, Delta and Alaska Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,152 reviews
Check prices

Entertainment

7.3

Comfort

7.9

Overall

8.1

Food

7.3

Boarding

8.2

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Alaska Airlines
8.1
Very good
9,152 reviews
Alaska Airlines
8.1
Very good
9,152 reviews
Check prices

Entertainment

7.3

Comfort

7.9

Overall

8.1

Food

7.3

Boarding

8.2

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Delta
8.0
Very good
10,691 reviews
Alaska Airlines
8.1
Very good
9,152 reviews
Check prices

Entertainment

7.3

Comfort

7.9

Overall

8.1

Food

7.3

Boarding

8.2

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Avianca
7.5
Good
3,766 reviews
Alaska Airlines
8.1
Very good
9,152 reviews
Check prices

Entertainment

7.3

Comfort

7.9

Overall

8.1

Food

7.3

Boarding

8.2

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

United Airlines
7.4
Good
10,959 reviews
Alaska Airlines
8.1
Very good
9,152 reviews
Check prices

Entertainment

7.3

Comfort

7.9

Overall

8.1

Food

7.3

Boarding

8.2

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

American Airlines
7.3
Good
14,561 reviews
Alaska Airlines
8.1
Very good
9,152 reviews
Check prices

Entertainment

7.3

Comfort

7.9

Overall

8.1

Food

7.3

Boarding

8.2

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Chicago. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Chicago?

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Chicago. You should not have trouble finding flights to Chicago from Ontario; the airport handles an average of 1 outbound flight to Chicago per day. You should also have plenty of airline options to choose from since 5 airlines have flights from the Ontario airport to Chicago. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

  • Can I find flights from Ontario to Chicago for under $200 on Cheapflights?

    Yes, there are multiple flights from Ontario to Chicago for under $200. The cheapest flight booked recently is on Frontier for just $136, but on average you can expect to pay $141.

  • Are there last-minute flights available from Ontario to Chicago for under $200?

    There are currently 20+ open flights from Ontario to Chicago within the next 7 days for less than $200.

  • What is the cheapest airline to fly from Ontario to Chicago round-trip?

    Cheapflights users have booked flights from Ontario to Chicago round-trip from $136. This flight start at 57% lower than the current average price 3 months from now.

  • What are the most popular routes from Ontario to Chicago?

    Most travelers choose Ontario - Chicago O'Hare Intl, Ontario - Chicago Midway or Ontario - Chicago Greater Rockford when deciding on the best route from Ontario to Chicago.

  • What are the most popular airlines that fly from Ontario to Chicago?

    American Airlines, Delta and Frontier are the most popular airlines when flying from Ontario to Chicago.

  • What does ONT to ORD mean?

    ONT and ORD are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. ONT to ORD refers to a flight route from Ontario Airport to Chicago O'Hare Intl Airport. Chicago Midway Airport (MDW), Chicago Greater Rockford Airport (RFD) are other airports near this flight route and their unique identifiers/IATA codes.

  • Can I find deals for flights from Ontario to Chicago that include extra baggage allowance?

    The amount of baggage you can bring on your Ontario to Chicago flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Ontario to Chicago with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to Chicago flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Ontario to Chicago that include hotel bookings?

    Yes. In addition to deals on Ontario to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Chicago?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Chicago.

  • Can I find deals for business class flights from Ontario to Chicago?

    Yes. Cheapflights offers flight deals from Ontario to Chicago by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Ontario to Chicago that allow pets onboard?

    Many airlines flying from Ontario to Chicago offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Ontario to Chicago?

    Yes, you can often find last-minute deals on Ontario to Chicago flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Ontario to Chicago flight deals updated?

    The Ontario to Chicago flight deals you see on this page were last updated on 5/15.

See more FAQs

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Alternative routes for Ontario to Chicago
See prices for flight routes from nearby airports that may be better suited for you.

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Top 5 airlines flying from Ontario to Chicago

Discover the top 5 airlines that operate flights from Ontario to Chicago. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 15, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$105Average$261FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
FrontierCheapest$123Average$230FlexibilityNo cancel feeOn-time62%
Search Frontier flights
United AirlinesCheapest$245Average$471FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$276Average$411FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$297Average$427FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
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Ontario to Charlottesville flights

Search flights from Ontario to Chicago by cabin class

Find flights from Ontario to Chicago, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from Ontario to Chicago

Find hourly flight availability from Ontario to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 15, 2024.
0%of flight departuresEarly morningMidnight to 6 am
100%of flight departuresMorning6 am to noon
0%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Ontario to Chicago

Explore weekly flight availability from Ontario to Chicago. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 15, 2024.
Sunday1daily flight
Monday2daily flights
Tuesday2daily flights
Wednesday2daily flights
Thursday2daily flights
Friday2daily flights
Saturday2daily flights

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to Chicago?

When you search for this flight from Ontario to Chicago, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Chicago?

Cheapflights helps you find that perfect flight to Chicago from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Ontario to Chicago with no change fees?

Yes, we can. To see specific flights from Ontario to Chicago with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Ontario to Chicago become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Chicago from Ontario today and book when prices fit your budget.

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