Cheap flights from St. Louis (STL) to Phoenix from $29

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 8/24. 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.
STL — PHX
Jun 12 — Jun 191

The best prices from Lambert-St Louis to Phoenix are usually found in May or August, booked 83 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from St. Louis to Phoenix

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Phoenix (PH1). 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 June 7, 2024.

Popular in

March

Cheapest in

May

Round-trip from

$251

One-way from

$66
High demand for flights, 16% potential price rise
Best time to find cheap flights, 34% potential price drop
From Lambert-St Louis to Phoenix
One-way flight from Lambert-St Louis to Phoenix

What is the cheapest day to fly round-trip from St. Louis to Phoenix?

Leaving on a Monday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 37% on the overall cost on flights from St. Louis to Phoenix.

How far in advance should I book a flight from St. Louis to Phoenix?

Users have found that booking a flight from St. Louis to Phoenix at least 53 days early can save you up to 40% on average compared to booking a flight this week. If booking 53 days before your flight isn’t an option for you, users have found flights from St. Louis to Phoenix for as little as $204 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $444 for flights departing within the next 3 days.

What is the cheapest month to fly from St. Louis to Phoenix?

The best pricing can be found in the month of May. Prices to Phoenix from St. Louis average $350. You can even find prices in May for less than $350, as users have found deals to Phoenix from as low as $78. The month of March appears to be one of the more expensive times to travel to Phoenix from St. Louis. Flying in the targeted month can save you up to 19%.

What is the cheapest time of day to fly from STL to PHX?

When flying from St. Louis to Phoenix, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 55% versus a flight in the morning.

Cheap St. Louis to Phoenix flights in June & July 2024

Find cheap flight options from St. Louis to Phoenix specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,045,324 searches. Prices were last updated on June 7, 2024.
Listed are some of the best fares we've found on flights departing from St. Louis to Phoenix in 2024. Check back soon for alternative fares.
Mon 7/2912:41 pmSTL - PHX
Nonstop3h 09mFrontier
Wed 8/75:08 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 6/7$89
Wed 7/310:57 pmSTL - PHX
Nonstop3h 18mFrontier
Wed 7/245:08 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 6/6$98
Sat 7/69:55 pmSTL - PHX
Nonstop3h 09mFrontier
Wed 7/105:08 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 6/6$100
Mon 7/110:00 pmSTL - PHX
Nonstop3h 17mFrontier
Sat 7/134:01 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 6/5$108
Fri 7/512:46 pmSTL - PHX
Nonstop3h 09mFrontier
Wed 7/105:08 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 6/6$110
Mon 7/110:00 pmSTL - PHX
Nonstop3h 17mFrontier
Fri 7/196:45 amPHX - STL
Nonstop3h 01mFrontier
Deal found 6/5$118
Tue 6/183:23 pmSTL - PHX
1 stop10h 18mMultiple Airlines
Fri 6/287:00 amPHX - STL
Nonstop2h 54mMultiple Airlines
Deal found 6/6$126
Tue 6/253:47 pmSTL - PHX
1 stop7h 30mFrontier
Wed 7/105:08 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 6/7$128
Wed 6/1210:57 pmSTL - PHX
Nonstop3h 18mFrontier
Fri 6/147:00 amPHX - STL
Nonstop2h 54mFrontier
Deal found 6/6$130

St. Louis to Phoenix 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Phoenix in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,045,324 searches. Data last updated June 7, 2024.
Listed are some of the best fares we've found on flights departing from St. Louis to Phoenix in 2024. Check back soon for alternative fares.
Wed 8/149:26 pmSTL - PHX
Nonstop3h 18mFrontier
Sat 8/315:50 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 6/7$58
Sat 9/1411:41 pmSTL - PHX
Nonstop3h 18mFrontier
Wed 9/183:35 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 6/7$60
Mon 8/1212:41 pmSTL - PHX
Nonstop3h 09mFrontier
Wed 8/283:35 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 6/7$68
Mon 9/169:26 pmSTL - PHX
Nonstop3h 18mFrontier
Sat 9/215:50 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 6/5$70
Mon 8/1212:41 pmSTL - PHX
Nonstop3h 09mFrontier
Fri 8/303:35 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 6/7$78
Mon 9/239:26 pmSTL - PHX
Nonstop3h 18mFrontier
Fri 9/273:35 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 6/6$86
Mon 7/2912:41 pmSTL - PHX
Nonstop3h 09mFrontier
Wed 8/75:08 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 6/7$89
Wed 7/310:57 pmSTL - PHX
Nonstop3h 18mFrontier
Wed 7/245:08 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 6/6$98
Sat 7/69:55 pmSTL - PHX
Nonstop3h 09mFrontier
Wed 7/105:08 pmPHX - STL
Nonstop3h 01mFrontier
Deal found 6/6$100

St. Louis to Phoenix flights leaving soon

Find last-minute flight options from St. Louis to Phoenix 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 3,045,324 searches. Data last updated June 7, 2024.
Book one of these great deals on flights from St. Louis to Phoenix. To prevent any unwanted surprises, users should verify their flight info before booking.
Fri 6/1412:54 pmSTL - PHX
Nonstop3h 17mFrontier
Mon 6/174:16 pmPHX - STL
Nonstop2h 54mFrontier
Deal found 6/6$118
Wed 6/1210:57 pmSTL - PHX
Nonstop3h 18mFrontier
Mon 6/174:16 pmPHX - STL
Nonstop2h 54mFrontier
Deal found 6/6$128
Wed 6/1210:57 pmSTL - PHX
Nonstop3h 18mFrontier
Fri 6/147:00 amPHX - STL
Nonstop2h 54mFrontier
Deal found 6/6$130
Thu 6/137:35 amSTL - PHX
Nonstop3h 20mAmerican Airlines
Tue 6/186:56 pmPHX - STL
Nonstop2h 54mAmerican Airlines
Deal found 6/6$131
Fri 6/145:36 pmSTL - PHX
1 stop8h 50mFrontier
Mon 6/174:16 pmPHX - STL
Nonstop2h 54mFrontier
Deal found 6/7$135
Fri 6/147:35 amSTL - PHX
Nonstop3h 20mAmerican Airlines
Tue 6/186:56 pmPHX - STL
Nonstop2h 54mAmerican Airlines
Deal found 6/6$156
Fri 6/1412:54 pmSTL - PHX
Nonstop3h 17mFrontier
Sun 6/169:40 pmPHX - STL
1 stop9h 49mFrontier
Deal found 6/6$158
Fri 6/145:36 pmSTL - PHX
1 stop8h 50mFrontier
Mon 6/173:44 pmPHX - STL
1 stop21h 03mFrontier
Deal found 6/7$162
Fri 6/1412:54 pmSTL - PHX
Nonstop3h 17mFrontier
Wed 6/199:43 pmPHX - STL
1 stop14h 49mFrontier
Deal found 6/6$165

One-way flights to Phoenix from St. Louis

Search for one-way flight options from St. Louis to Phoenix. 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 3,045,324 searches. Data last updated June 7, 2024.
Users in need of a one-way flight from St. Louis to Phoenix can choose from these deals. Users can also find round-trip St. Louis to Phoenix flights by using the search form above.
Sat 8/2411:41 pmSTL - PHX
Nonstop3h 18mFrontier
Deal found 6/6$29
Sat 7/69:55 pmSTL - PHX
Nonstop3h 09mFrontier
Deal found 6/6$51
Fri 6/2112:54 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 6/7$59
Mon 7/110:00 pmSTL - PHX
Nonstop3h 17mFrontier
Deal found 6/6$60
Tue 6/186:11 pmSTL - PHX
Nonstop3h 17mAmerican Airlines
Deal found 6/5$66
Fri 6/215:36 pmSTL - PHX
1 stop5h 26mFrontier
Deal found 6/7$76
Mon 6/242:41 pmSTL - PHX
1 stop20h 45mSpirit Airlines
Deal found 6/6$78
Wed 11/69:26 pmSTL - PHX
Nonstop3h 18mFrontier
Deal found 6/7$79
Wed 10/169:26 pmSTL - PHX
Nonstop3h 18mFrontier
Deal found 6/7$80

Find flights from St. Louis to Phoenix within your budget

Customize your flight search to find flights from St. Louis to Phoenix 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 3,045,324 searches. Data last updated June 7, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$58 - $216

Route

Depart

Return

Price

Lambert-St LouisPhoenix Sky Harbor Intl

STL - PHX

STLPHX

Lambert-St Louis

Wed 8/14

Nonstop3h 18m

Phoenix Sky Harbor Intl

Sat 8/31

Nonstop3h 01m

$58

Lambert-St LouisPhoenix Sky Harbor Intl

STL - PHX

STLPHX

Lambert-St Louis

Sat 9/14

Nonstop3h 18m

Phoenix Sky Harbor Intl

Wed 9/18

Nonstop3h 01m

$60

Lambert-St LouisPhoenix Sky Harbor Intl

STL - PHX

STLPHX

Lambert-St Louis

Mon 8/12

Nonstop3h 09m

Phoenix Sky Harbor Intl

Wed 8/28

Nonstop3h 01m

$68

Lambert-St LouisPhoenix Sky Harbor Intl

STL - PHX

STLPHX

Lambert-St Louis

Mon 9/16

Nonstop3h 18m

Phoenix Sky Harbor Intl

Sat 9/21

Nonstop3h 01m

$70

Lambert-St LouisPhoenix Sky Harbor Intl

STL - PHX

STLPHX

Lambert-St Louis

Mon 8/12

Nonstop3h 09m

Phoenix Sky Harbor Intl

Fri 8/30

Nonstop3h 01m

$78

Lambert-St LouisPhoenix Sky Harbor Intl

STL - PHX

STLPHX

Lambert-St Louis

Sat 9/14

Nonstop3h 18m

Phoenix Sky Harbor Intl

Wed 9/18

1 stop14h 23m

$107

Lambert-St LouisPhoenix Sky Harbor Intl

STL - PHX

STLPHX

Lambert-St Louis

Tue 7/2

Nonstop3h 20m

Phoenix Sky Harbor Intl

Tue 7/23

Nonstop3h 00m

$131

Lambert-St LouisPhoenix Sky Harbor Intl

STL - PHX

STLPHX

Lambert-St Louis

Thu 9/5

1 stop7h 52m

Phoenix Sky Harbor Intl

Sun 9/8

1 stop14h 23m

$160

Lambert-St LouisPhoenix Sky Harbor Intl

STL - PHX

STLPHX

Lambert-St Louis

Tue 7/2

1 stop6h 17m

Phoenix Sky Harbor Intl

Sun 7/21

1 stop5h 53m

$216

Flights are sorted by cheapest first

Deals found on 6/7

How far ahead should I book a flight from St. Louis to Phoenix?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Phoenix. Price data was last updated on May 31, 2024.
The best time to book flights from St. Louis to Phoenix is 83 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.
Search Deals

What is the cheapest day to fly from St. Louis to Phoenix?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Phoenix. Price data was last updated on June 2, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Phoenix flight should consider departing on Wednesday evenings when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from St. Louis to Phoenix

Have a flexible travel schedule? Discover the best time to fly to Phoenix from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in Phoenix by month

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

PHX

Temperature

55.4 - 95 °F

If weather is an important factor for your trip to Phoenix, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 95.0 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 55.4 F).

Reviews of airlines servicing Phoenix

Get insights into the airlines that provide service to Phoenix. 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 Phoenix. Reviews last updated June 7, 2024.
To help decide which airline to fly from St. Louis to Phoenix, see what other customers have to say about American Airlines, Frontier and Spirit Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
9,231 reviews

Food

7.3

Entertainment

7.3

Comfort

7.9

Crew

8.6

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

8.1
Very good
9,231 reviews
8.1
Very good
9,231 reviews

Food

7.3

Entertainment

7.3

Comfort

7.9

Crew

8.6

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

8.0
Very good
10,347 reviews
8.1
Very good
9,231 reviews

Food

7.3

Entertainment

7.3

Comfort

7.9

Crew

8.6

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

7.4
Good
10,686 reviews
8.1
Very good
9,231 reviews

Food

7.3

Entertainment

7.3

Comfort

7.9

Crew

8.6

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

7.3
Good
14,204 reviews
8.1
Very good
9,231 reviews

Food

7.3

Entertainment

7.3

Comfort

7.9

Crew

8.6

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

7.2
Good
590 reviews
8.1
Very good
9,231 reviews

Food

7.3

Entertainment

7.3

Comfort

7.9

Crew

8.6

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Phoenix. 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 St. Louis to Phoenix?

    Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to Phoenix from St. Louis. Booking flights from Lambert-St Louis (STL) to Phoenix should be relatively easy as there are 10 daily outbound flights to Phoenix from 5 different airlines.

  • Can I find flights from St. Louis to Phoenix for under $100 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Phoenix for under $100. The cheapest flight booked recently is on Frontier for just $58, but on average you can expect to pay $102.

  • Are there nonstop flights from St. Louis to Phoenix for under $100 on Cheapflights?

    Cheapflights has at least 20 direct flights from St. Louis to Phoenix under $100. A good price for a nonstop flight from St. Louis to Phoenix is less than $113.

  • Are there last-minute flights available from St. Louis to Phoenix for under $200?

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

  • What are the cheapest airlines flying from St. Louis to Phoenix round-trip?

    Currently priced at $58, Frontier will fly you from St. Louis to Phoenix and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on American Airlines for as low as $131. These flights start at 83% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from St. Louis to Phoenix one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $29. Users have also found prices from $66 and $78 on American Airlines and Spirit Airlines, respectively.

  • What are the most reliable airlines from St. Louis to Phoenix?

    No one likes to see their flight delayed. When booking a flight from St. Louis to Phoenix consider choosing American Airlines (87%), Alaska Airlines (86%) or Envoy Air (76%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from St. Louis to Phoenix?

    While on average a flight from St. Louis to Phoenix is generally $1,669, our data shows the cheapest flight currently is $47. When looking at the most popular route, (Lambert-St Louis - Phoenix Sky Harbor Intl), you can expect to pay $115 for that flight.

  • What does STL to PHX mean?

    This is defined as Lambert-St Louis Airport (STL) and Phoenix Sky Harbor Intl Airport (PHX). Codes like Phoenix Sky Harbor Intl Airport are often used to just call airports uniquely. This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Phoenix-Mesa Gateway Airport (AZA), Prescott Airport (PRC), Phoenix Scottsdale Municipal Airport (SCF).

  • Can I find deals for flights from St. Louis to Phoenix that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Phoenix 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 St. Louis to Phoenix with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Phoenix 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 St. Louis to Phoenix that include hotel bookings?

    Yes. In addition to deals on St. Louis to Phoenix flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Phoenix?

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

  • Can I find deals for business class flights from St. Louis to Phoenix?

    Yes. Cheapflights offers flight deals from St. Louis to Phoenix 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 St. Louis to Phoenix that allow pets onboard?

    Many airlines flying from St. Louis to Phoenix 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 St. Louis to Phoenix?

    Yes, you can often find last-minute deals on St. Louis to Phoenix 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 St. Louis to Phoenix flight deals updated?

    The St. Louis to Phoenix flight deals you see on this page were last updated on 6/7.

  • What are the most popular airlines that fly from St. Louis to Phoenix?

  • What is the cheapest month to book a flight from St. Louis to Phoenix?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Phoenix (average of $251). Flying from St. Louis to Phoenix in June is currently the most expensive (average of $332). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from St. Louis to Phoenix

Discover the top 5 airlines that operate flights from St. Louis to Phoenix. 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 3,045,324 searches. Data last updated June 7, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$182FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$110Average$148FlexibilityNo cancel feeOn-time65%
DeltaCheapest$211Average$406FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$212Average$407FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$334Average$596FlexibilityNo cancel feeOn-time69%

Search flights from St. Louis to Phoenix by cabin class

Find flights from St. Louis to Phoenix, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Hourly flight availability from St. Louis to Phoenix

Find hourly flight availability from St. Louis to Phoenix. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 7, 2024.
8%of flight departuresEarly morningMidnight to 6 am
14%of flight departuresMorning6 am to noon
73%of flight departuresAfternoonNoon to 6 pm
5%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from St. Louis to Phoenix

Explore weekly flight availability from St. Louis to Phoenix. 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 June 7, 2024.
Sunday13daily flights
Monday11daily flights
Tuesday11daily flights
Wednesday11daily flights
Thursday11daily flights
Friday10daily flights
Saturday9daily flights
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