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Cheap flights from Ontario to St. Louis (STL) from $157

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 6/6. 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.
YYZ — STL
May 21 — May 281
From?
To?
Tue 5/21
Tue 5/28
1 adult, Economy
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How far in advance should I book a flight from Region of Ontario to St. Louis?

Find a great deal and save up to 85% by booking at least 44 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Region of Ontario to St. Louis within the next two weeks, with the cheapest ticket starting at $434.

What is the cheapest month to fly from Region of Ontario to St. Louis?

Flights from Region of Ontario to St. Louis lean towards being more expensive in June. Prices are generally better when you fly from Region of Ontario to St. Louis in January, with the cheapest ticket starting at $338.

When is the cheapest time to fly from Region of Ontario to St. Louis (ON - STL)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to St. Louis as you normally would.

Cheap United Airlines flights from Ontario to St. Louis

Explore cheap flight options specifically provided by United Airlines for the route between Ontario and St. Louis. 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 2,637,452 searches. Data last updated May 16, 2024.
Peruse some of the lowest-priced United Airlines flights we've found from Ontario to St. Louis. Be sure to come back soon if the deals available don't appeal to you at this time.
Sat 9/77:30 pmYUL - STL
Nonstop2h 35mUnited Airlines
Tue 9/105:18 pmSTL - YUL
2 stops15h 53mUnited Airlines
Deal found 5/14$380
Fri 8/306:15 amYUL - STL
1 stop4h 52mUnited Airlines
Sun 9/16:02 amSTL - YUL
1 stop6h 14mUnited Airlines
Deal found 5/14$385
Sat 9/711:30 amYUL - STL
1 stop5h 19mUnited Airlines
Tue 9/105:18 pmSTL - YUL
2 stops15h 53mUnited Airlines
Deal found 5/14$386
Fri 6/282:15 pmYYZ - STL
Nonstop2h 06mUnited Airlines
Mon 7/15:30 pmSTL - YYZ
1 stop5h 28mUnited Airlines
Deal found 5/14$443
Fri 6/142:15 pmYYZ - STL
Nonstop2h 06mUnited Airlines
Sun 6/236:08 amSTL - YYZ
1 stop6h 39mUnited Airlines
Deal found 5/15$453
Thu 8/152:15 pmYYZ - STL
Nonstop2h 06mUnited Airlines
Sun 8/186:08 amSTL - YYZ
1 stop6h 39mUnited Airlines
Deal found 5/15$468
Thu 8/152:15 pmYYZ - STL
Nonstop2h 06mUnited Airlines
Sun 8/186:08 amSTL - YYZ
1 stop6h 39mUnited Airlines
Deal found 5/16$469
Tue 7/162:15 pmYYZ - STL
Nonstop2h 06mUnited Airlines
Fri 7/195:30 pmSTL - YYZ
2 stops13h 28mUnited Airlines
Deal found 5/15$486
Thu 10/172:15 pmYYZ - STL
Nonstop2h 05mUnited Airlines
Sun 10/2010:10 amSTL - YYZ
Nonstop1h 54mUnited Airlines
Deal found 5/15$575

Cheap Delta flights from Ontario to St. Louis

Explore cheap flight options specifically provided by Delta for the route between Ontario and St. Louis. 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 2,637,452 searches. Data last updated May 16, 2024.
To aid your search, here are some of the cheapest Delta flights we've found from Ontario to St. Louis. Deals are refreshing constantly so come back soon for more options.
Wed 6/127:46 amYYZ - STL
1 stop5h 15mDelta
Wed 6/194:02 pmSTL - YYZ
1 stop4h 57mDelta
Deal found 5/15$380
Wed 5/295:59 pmYYZ - STL
1 stop4h 35mDelta
Sat 6/226:06 amSTL - YYZ
1 stop4h 32mDelta
Deal found 5/15$382
Sat 9/77:30 amYUL - STL
1 stop7h 59mDelta
Tue 9/106:00 pmSTL - YUL
1 stop4h 02mDelta
Deal found 5/15$387
Tue 6/47:44 amYYZ - STL
1 stop5h 04mDelta
Wed 6/56:30 pmSTL - YYZ
1 stop4h 27mDelta
Deal found 5/15$413
Mon 6/36:46 pmYUL - STL
1 stop5h 54mDelta
Fri 6/74:02 pmSTL - YUL
1 stop6h 53mDelta
Deal found 5/14$428
Mon 5/277:45 amYYZ - STL
1 stop5h 03mDelta
Wed 6/194:02 pmSTL - YYZ
1 stop4h 57mDelta
Deal found 5/15$441
Wed 5/2210:00 amYUL - STL
1 stop5h 10mDelta
Wed 5/292:18 pmSTL - YUL
1 stop7h 50mDelta
Deal found 5/15$447
Sun 5/266:34 amYYZ - STL
1 stop8h 41mDelta
Fri 6/216:06 amSTL - YYZ
1 stop4h 32mDelta
Deal found 5/15$449

Cheap Ontario to St. Louis flights in May & June 2024

Find cheap flight options from Ontario to St. Louis specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,637,452 searches. Prices were last updated on May 16, 2024.
These are some of the best deals we've found on flights to St. Louis in 2024 at this time. Check back regularly for other flight deals.
Sun 6/96:30 amYYZ - STL
1 stop11h 02mMultiple Airlines
Tue 6/1111:57 amSTL - YYZ
1 stop25h 31mMultiple Airlines
Deal found 5/15$263
Wed 5/227:50 amYYZ - STL
1 stop13h 20mMultiple Airlines
Wed 5/299:10 pmSTL - YYZ
1 stop25h 16mMultiple Airlines
Deal found 5/15$282
Tue 5/287:50 amYYZ - STL
1 stop6h 47mMultiple Airlines
Tue 6/187:29 pmSTL - YYZ
1 stop10h 06mMultiple Airlines
Deal found 5/15$291
Sun 5/266:30 amYYZ - STL
1 stop11h 59mMultiple Airlines
Tue 6/187:29 pmSTL - YYZ
1 stop10h 06mMultiple Airlines
Deal found 5/15$310
Sun 6/96:30 amYYZ - STL
1 stop11h 02mMultiple Airlines
Tue 6/117:45 amSTL - YYZ
2 stops10h 50mMultiple Airlines
Deal found 5/15$313
Fri 5/248:15 pmYYZ - STL
1 stop15h 13mMultiple Airlines
Thu 6/207:45 amSTL - YYZ
2 stops10h 50mMultiple Airlines
Deal found 5/15$323
Fri 5/2410:40 amYYZ - STL
1 stop24h 48mMultiple Airlines
Wed 6/191:55 pmSTL - YYZ
1 stop15h 48mMultiple Airlines
Deal found 5/15$324
Fri 5/248:15 pmYYZ - STL
1 stop15h 13mMultiple Airlines
Sat 6/2211:34 amSTL - YYZ
1 stop10h 52mMultiple Airlines
Deal found 5/15$325
Sat 5/258:30 pmYYZ - STL
1 stop11h 38mMultiple Airlines
Thu 6/207:45 amSTL - YYZ
2 stops10h 50mMultiple Airlines
Deal found 5/15$327

Ontario to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Ontario and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated May 16, 2024.
These are some of the best deals we've found on flights to St. Louis in 2024 at this time. Check back regularly for other flight deals.
Sun 6/96:30 amYYZ - STL
1 stop11h 02mMultiple Airlines
Tue 6/1111:57 amSTL - YYZ
1 stop25h 31mMultiple Airlines
Deal found 5/15$263
Wed 5/227:50 amYYZ - STL
1 stop13h 20mMultiple Airlines
Wed 5/299:10 pmSTL - YYZ
1 stop25h 16mMultiple Airlines
Deal found 5/15$282
Tue 5/287:50 amYYZ - STL
1 stop6h 47mMultiple Airlines
Tue 6/187:29 pmSTL - YYZ
1 stop10h 06mMultiple Airlines
Deal found 5/15$291
Sun 5/266:30 amYYZ - STL
1 stop11h 59mMultiple Airlines
Tue 6/187:29 pmSTL - YYZ
1 stop10h 06mMultiple Airlines
Deal found 5/15$310
Sun 6/96:30 amYYZ - STL
1 stop11h 02mMultiple Airlines
Tue 6/117:45 amSTL - YYZ
2 stops10h 50mMultiple Airlines
Deal found 5/15$313
Fri 5/248:15 pmYYZ - STL
1 stop15h 13mMultiple Airlines
Thu 6/207:45 amSTL - YYZ
2 stops10h 50mMultiple Airlines
Deal found 5/15$323
Fri 5/2410:40 amYYZ - STL
1 stop24h 48mMultiple Airlines
Wed 6/191:55 pmSTL - YYZ
1 stop15h 48mMultiple Airlines
Deal found 5/15$324
Fri 5/248:15 pmYYZ - STL
1 stop15h 13mMultiple Airlines
Sat 6/2211:34 amSTL - YYZ
1 stop10h 52mMultiple Airlines
Deal found 5/15$325
Sat 5/258:30 pmYYZ - STL
1 stop11h 38mMultiple Airlines
Thu 6/207:45 amSTL - YYZ
2 stops10h 50mMultiple Airlines
Deal found 5/15$327

Non-stop flights to St. Louis from Ontario

Discover non-stop flight options from Ontario to St. Louis. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated May 16, 2024.
Consider booking one of these non-stop flights heading from Ontario to St. Louis. Those looking to potentially save on 1 or 2-stop flights from Ontario to St. Louis should utilize the search form at the the top of the page.
Thu 10/36:55 pmYYZ - STL
Nonstop2h 05mAir Canada
Sun 10/64:05 pmSTL - YYZ
Nonstop1h 54mAir Canada
Deal found 5/14$435
Wed 7/102:15 pmYYZ - STL
Nonstop2h 06mMultiple Airlines
Tue 7/164:05 pmSTL - YYZ
Nonstop1h 59mMultiple Airlines
Deal found 5/15$439
Fri 6/282:15 pmYYZ - STL
Nonstop2h 06mUnited Airlines
Mon 7/14:05 pmSTL - YYZ
Nonstop1h 59mUnited Airlines
Deal found 5/14$443
Fri 6/146:55 pmYYZ - STL
Nonstop2h 06mMultiple Airlines
Sun 6/2311:00 amSTL - YYZ
Nonstop1h 59mMultiple Airlines
Deal found 5/16$454
Mon 8/126:55 pmYYZ - STL
Nonstop2h 06mAir Canada
Sun 8/1810:10 amSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/15$458
Wed 5/292:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Sat 6/224:05 pmSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/15$467
Wed 7/32:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Sun 7/710:10 amSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/15$468
Thu 8/156:55 pmYYZ - STL
Nonstop2h 06mAir Canada
Sun 8/184:05 pmSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/16$469
Fri 8/167:30 pmYUL - STL
Nonstop2h 35mAir Canada
Wed 8/2112:00 pmSTL - YUL
Nonstop2h 23mAir Canada
Deal found 5/15$476

Ontario to St. Louis flights leaving soon

Find last-minute flight options from Ontario to St. Louis 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 2,637,452 searches. Data last updated May 16, 2024.
Consider one of these great deals we found on last-minute flights from Ontario to St. Louis. It's wise to confirm all flight details are correct before booking.
Wed 5/227:50 amYYZ - STL
1 stop13h 20mMultiple Airlines
Wed 5/299:10 pmSTL - YYZ
1 stop25h 16mMultiple Airlines
Deal found 5/15$282
Sun 5/266:30 amYYZ - STL
1 stop11h 59mMultiple Airlines
Tue 6/187:29 pmSTL - YYZ
1 stop10h 06mMultiple Airlines
Deal found 5/15$310
Fri 5/248:15 pmYYZ - STL
1 stop15h 13mMultiple Airlines
Thu 6/207:45 amSTL - YYZ
2 stops10h 50mMultiple Airlines
Deal found 5/15$323
Fri 5/2410:40 amYYZ - STL
1 stop24h 48mMultiple Airlines
Wed 6/191:55 pmSTL - YYZ
1 stop15h 48mMultiple Airlines
Deal found 5/15$324
Fri 5/248:15 pmYYZ - STL
1 stop15h 13mMultiple Airlines
Sat 6/2211:34 amSTL - YYZ
1 stop10h 52mMultiple Airlines
Deal found 5/15$325
Sat 5/258:30 pmYYZ - STL
1 stop11h 38mMultiple Airlines
Thu 6/207:45 amSTL - YYZ
2 stops10h 50mMultiple Airlines
Deal found 5/15$327
Sat 5/258:30 pmYYZ - STL
1 stop11h 38mMultiple Airlines
Sat 6/2211:34 amSTL - YYZ
1 stop10h 52mMultiple Airlines
Deal found 5/15$330
Sat 5/258:30 pmYYZ - STL
1 stop11h 38mMultiple Airlines
Tue 6/187:45 amSTL - YYZ
2 stops10h 50mMultiple Airlines
Deal found 5/15$340
Fri 5/2410:40 amYYZ - STL
1 stop24h 48mMultiple Airlines
Sun 6/166:30 amSTL - YYZ
1 stop10h 02mMultiple Airlines
Deal found 5/15$359

One-way flights to St. Louis from Ontario

Search for one-way flight options from Ontario to St. Louis. 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 2,637,452 searches. Data last updated May 16, 2024.
Users traveling one-way from Ontario to St. Louis can select one of these great deals. Users in need of a round-trip flight from Ontario to St. Louis instead should update the search form at the top of page.
Thu 6/64:15 pmYYZ - STL
1 stop15h 52mMultiple Airlines
Deal found 5/15$157
Fri 6/218:15 pmYYZ - STL
1 stop15h 19mMultiple Airlines
Deal found 5/15$169
Fri 6/218:15 pmYYZ - STL
1 stop15h 19mMultiple Airlines
Deal found 5/15$170
Wed 6/198:00 pmYYZ - STL
1 stop15h 42mMultiple Airlines
Deal found 5/15$182
Fri 7/127:50 amYYZ - STL
1 stop25h 46mMultiple Airlines
Deal found 5/16$188
Fri 6/214:15 pmYYZ - STL
2 stops26h 13mMultiple Airlines
Deal found 5/15$210
Fri 6/218:15 pmYYZ - STL
2 stops22h 13mMultiple Airlines
Deal found 5/15$211
Thu 8/88:15 pmYYZ - STL
1 stop13h 21mMultiple Airlines
Deal found 5/15$212
Thu 6/66:17 amYYZ - STL
1 stop6h 31mDelta
Deal found 5/15$217

Find flights from Ontario to St. Louis within your budget

Customize your flight search to find flights from Ontario to St. Louis 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 2,637,452 searches. Data last updated May 16, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$263 - $438

Route

Depart

Return

Price

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 6/9

1 stop11h 02m

Lambert-St Louis

Tue 6/11

1 stop25h 31m

$263

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 5/28

1 stop6h 47m

Lambert-St Louis

Tue 6/18

1 stop10h 06m

$291

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 5/26

1 stop11h 59m

Lambert-St Louis

Tue 6/18

1 stop10h 06m

$310

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 6/9

1 stop11h 02m

Lambert-St Louis

Tue 6/11

2 stops10h 50m

$313

Montreal Pierre Elliott Trudeau IntlLambert-St Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sat 9/7

Nonstop2h 35m

Lambert-St Louis

Tue 9/10

2 stops15h 53m

$380

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 6/12

1 stop5h 15m

Lambert-St Louis

Wed 6/19

1 stop4h 57m

$380

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 8/12

1 stop9h 40m

Lambert-St Louis

Sun 8/18

1 stop4h 39m

$381

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 7/17

1 stop5h 45m

Lambert-St Louis

Sat 7/20

1 stop5h 30m

$423

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 6/18

Nonstop2h 06m

Lambert-St Louis

Tue 6/18

1 stop5h 27m

$438

Flights are sorted by cheapest first

Deals found on 5/15

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated May 16, 2024.
Peruse reviews from past customers who have flown with United Airlines, Delta and American Airlines from Ontario to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,157 reviews
Check prices

Comfort

7.9

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.3

Food

7.3

Reviews

1 / 10

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

Alaska Airlines
8.1
Very good
9,157 reviews
Alaska Airlines
8.1
Very good
9,157 reviews
Check prices

Comfort

7.9

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.3

Food

7.3

Reviews

1 / 10

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

Delta
8.0
Very good
10,673 reviews
Alaska Airlines
8.1
Very good
9,157 reviews
Check prices

Comfort

7.9

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.3

Food

7.3

Reviews

1 / 10

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

WestJet
7.5
Good
2,919 reviews
Alaska Airlines
8.1
Very good
9,157 reviews
Check prices

Comfort

7.9

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.3

Food

7.3

Reviews

1 / 10

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

United Airlines
7.4
Good
10,924 reviews
Alaska Airlines
8.1
Very good
9,157 reviews
Check prices

Comfort

7.9

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.3

Food

7.3

Reviews

1 / 10

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

American Airlines
7.3
Good
14,514 reviews
Alaska Airlines
8.1
Very good
9,157 reviews
Check prices

Comfort

7.9

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.3

Food

7.3

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 St. Louis. 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 into for flights to St. Louis from Ontario?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to St. Louis from Ontario.

  • Can I find flights from Region of Ontario to St. Louis for under $300 on Cheapflights?

    Yes, there are multiple flights from Region of Ontario to St. Louis for under $300. The cheapest flight booked recently is on Multiple Airlines for just $263, but on average you can expect to pay $342.

  • Are there nonstop flights from Region of Ontario to St. Louis for under $500 on Cheapflights?

    Cheapflights has at least 20 direct flights from Region of Ontario to St. Louis under $500. A good price for a nonstop flight from Region of Ontario to St. Louis is less than $513.

  • Are there last-minute flights available from Region of Ontario to St. Louis for under $300?

    There are currently 20+ open flights from Region of Ontario to St. Louis within the next 7 days for less than $300.

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

    $217 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on American Airlines and Air Canada, with prices starting from $228 and $238, respectively.

  • What are the most popular routes from Region of Ontario to St. Louis?

    While some choose either Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis or Ottawa - Lambert-St Louis, Toronto Pearson Intl - Lambert-St Louis is the most popular route from Region of Ontario to St. Louis.

  • What are the most reliable airlines from Region of Ontario to St. Louis?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Region of Ontario to St. Louis on time: Air Canada (74%), Jazz (74%), United Airlines (74%).

  • What are the cheapest flights from Region of Ontario to St. Louis?

    The cheapest flight price from Region of Ontario to St. Louis is $228. On average you can expect to pay $366. The most popular route, (Toronto Pearson Intl - Lambert-St Louis), can usually be booked for $263.

  • What does YYZ to STL mean?

    YYZ and STL 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. YYZ to STL refers to a flight route from Toronto Pearson Intl Airport to Lambert-St Louis Airport. Ottawa Airport (YOW), Toronto Island Airport (YTZ), Hamilton Airport (YHM), London Airport (YXU), Toronto Kitchener-Waterloo Airport (YKF) are some additional IATA codes for airports related to your trip.

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

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

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

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

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

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

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

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

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

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

    The Region of Ontario to St. Louis 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 St. Louis
See prices for flight routes from nearby airports that may be better suited for you.

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Top 2 airlines flying from Ontario to St. Louis

Discover the top 2 airlines that operate flights from Ontario to St. Louis. 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 2,637,452 searches. Data last updated May 16, 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$295Average$518FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$329Average$550FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
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Search flights from Ontario to St. Louis by cabin class

Find flights from Ontario to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Hourly flight availability from Ontario to St. Louis

Find hourly flight availability from Ontario to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 16, 2024.
0%of flight departuresEarly morningMidnight to 6 am
0%of flight departuresMorning6 am to noon
100%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

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Can Cheapflights find flights from Ontario to St. Louis with no change fees?

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Can Cheapflights notify me if prices for flights from Ontario to St. Louis become cheaper?

Yes! Start tracking prices for Ontario to St. Louis flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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