Cheap flights from St. Louis (STL) to Ontario from $123

Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Ontario. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

Yes, there are multiple flights from St. Louis to Region of Ontario for under $300. The cheapest flight booked recently is on Multiple Airlines for just $266, but on average you can expect to pay $344.

Cheapflights has at least 20 direct flights from St. Louis to Region of Ontario under $500. A good price for a nonstop flight from St. Louis to Region of Ontario is less than $598.

There are currently 20+ open flights from St. Louis to Region of Ontario within the next 7 days for less than $400.

You can find nonstop flights on the following days: Sunday, Thursday, Saturday.

2 flight departures from St. Louis to Region of Ontario per day on average.
Morning (6am - Noon) - 100% of flight departures

One-way options have recently been found by users for as low as $191 on Delta. Other airlines that offer cheap prices include Air Canada from $197 and American Airlines from $201 one-way.

When deciding which route to take from St. Louis to Region of Ontario consider Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl, Lambert-St Louis - Toronto Pearson Intl or Lambert-St Louis - Ottawa as they are the most popular.

No one likes to see their flight delayed. When booking a flight from St. Louis to Region of Ontario consider choosing United Airlines (82%), Air Canada (78%) or Jazz (78%) as they are the most reliable in getting you off to your destination on time.

Looking for the cheapest flight from St. Louis to Region of Ontario? While on average our users pay $1,161, our data indicates the cheapest price to be $242. The most popular route (Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl), is priced around $367.

Great question - STL to YYZ just means Lambert-St Louis Airport to Toronto Pearson Intl Airport. Now you’ll know what these unique codes when you look for flights! 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 Ottawa Airport (YOW), Hamilton Airport (YHM), Toronto Island Airport (YTZ), Toronto Kitchener-Waterloo Airport (YKF), London Airport (YXU).

The amount of baggage you can bring on your St. Louis to Ontario 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.

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

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

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

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

Many airlines flying from St. Louis to Ontario 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.

Yes, you can often find last-minute deals on St. Louis to Ontario 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.

The St. Louis to Region of Ontario flight deals you see on this page were last updated on 6/12.

American Airlines, Air Canada and United Airlines are the most popular airlines when flying from St. Louis to Region of Ontario.

Currently, January is the cheapest month in which you can book a flight from St. Louis to Region of Ontario (average of $237). Flying from St. Louis to Region of Ontario in July is currently the most expensive (average of $387). 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.