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Cheap flights from Ontario to St. Louis (STL) from $147

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 9/17. 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
Jun 4 — Jun 111
From?
To?
Tue 6/4
Tue 6/11
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 March. Prices are generally better when you fly from Region of Ontario to St. Louis in January, with the cheapest ticket starting at $338.

What is the cheapest time of day to fly from ON to 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 2,784,634 searches. Data last updated May 30, 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.
Fri 8/307:30 pmYUL - STL
Nonstop2h 35mUnited Airlines
Wed 9/46:02 amSTL - YUL
1 stop6h 14mUnited Airlines
Deal found 5/28$426
Thu 7/41:57 pmYUL - STL
2 stops21h 28mUnited Airlines
Sun 7/216:08 amSTL - YUL
1 stop6h 08mUnited Airlines
Deal found 5/30$429
Thu 7/46:15 amYUL - STL
1 stop9h 03mUnited Airlines
Sun 7/216:08 amSTL - YUL
1 stop6h 08mUnited Airlines
Deal found 5/29$431
Thu 7/411:00 amYUL - STL
1 stop12h 37mUnited Airlines
Sun 7/76:08 amSTL - YUL
1 stop6h 08mUnited Airlines
Deal found 5/29$432
Fri 7/196:55 pmYYZ - STL
Nonstop2h 06mUnited Airlines
Sun 7/216:08 amSTL - YYZ
1 stop6h 39mUnited Airlines
Deal found 5/29$437
Tue 6/256:00 amYUL - STL
2 stops10h 41mUnited Airlines
Sun 6/306:08 amSTL - YUL
1 stop6h 08mUnited Airlines
Deal found 5/29$464
Thu 8/156:55 pmYYZ - STL
Nonstop2h 06mUnited Airlines
Sun 8/186:08 amSTL - YYZ
1 stop6h 39mUnited Airlines
Deal found 5/30$467
Sun 9/82:15 pmYYZ - STL
Nonstop2h 05mUnited Airlines
Mon 9/910:10 amSTL - YYZ
Nonstop1h 54mUnited Airlines
Deal found 5/29$469
Sun 6/166:55 pmYYZ - STL
Nonstop2h 06mUnited Airlines
Fri 6/215:31 pmSTL - YYZ
1 stop5h 27mUnited Airlines
Deal found 5/29$477

Cheap Air Canada flights from Ontario to St. Louis

Explore cheap flight options specifically provided by Air Canada 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 2,784,634 searches. Data last updated May 30, 2024.
To aid your search, here are some of the cheapest Air Canada flights we've found from Ontario to St. Louis. Deals are refreshing constantly so come back soon for more options.
Mon 7/12:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Thu 7/1110:10 amSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/29$428
Tue 7/22:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Sun 7/710:10 amSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/29$439
Tue 7/97:40 amYYZ - STL
1 stop5h 37mAir Canada
Wed 7/244:05 pmSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/29$445
Tue 7/92:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Wed 7/244:05 pmSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/29$454
Thu 7/47:30 pmYUL - STL
Nonstop2h 35mAir Canada
Sun 7/2111:30 amSTL - YUL
Nonstop2h 23mAir Canada
Deal found 5/30$456
Thu 7/47:30 pmYUL - STL
Nonstop2h 35mAir Canada
Sun 7/2111:30 amSTL - YUL
Nonstop2h 23mAir Canada
Deal found 5/29$458
Fri 8/167:30 pmYUL - STL
Nonstop2h 35mAir Canada
Wed 8/214:05 pmSTL - YUL
1 stop8h 43mAir Canada
Deal found 5/30$465
Thu 7/47:30 pmYUL - STL
Nonstop2h 35mAir Canada
Sun 7/711:30 amSTL - YUL
Nonstop2h 23mAir Canada
Deal found 5/29$480
Wed 7/312:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Sat 8/310:10 amSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/30$485

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 2,784,634 searches. Prices were last updated on May 30, 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.
Mon 6/1010:35 amYYZ - STL
1 stop25h 22mMultiple Airlines
Tue 6/113:23 pmSTL - YYZ
1 stop29h 02mMultiple Airlines
Deal found 5/30$248
Mon 6/1010:35 amYYZ - STL
1 stop21h 32mMultiple Airlines
Mon 6/177:29 pmSTL - YYZ
1 stop26h 16mMultiple Airlines
Deal found 5/30$251
Mon 6/1010:35 amYYZ - STL
1 stop21h 32mMultiple Airlines
Tue 6/113:23 pmSTL - YYZ
1 stop29h 02mMultiple Airlines
Deal found 5/29$254
Thu 6/64:15 pmYYZ - STL
1 stop15h 52mMultiple Airlines
Mon 6/177:29 pmSTL - YYZ
1 stop26h 16mMultiple Airlines
Deal found 5/30$256
Mon 6/1010:35 amYYZ - STL
1 stop21h 32mMultiple Airlines
Tue 6/117:29 pmSTL - YYZ
1 stop10h 06mMultiple Airlines
Deal found 5/30$259
Thu 6/64:15 pmYYZ - STL
1 stop15h 52mMultiple Airlines
Tue 6/1111:57 amSTL - YYZ
1 stop10h 29mMultiple Airlines
Deal found 5/30$261
Wed 6/510:35 amYYZ - STL
1 stop21h 32mMultiple Airlines
Tue 6/117:44 pmSTL - YYZ
1 stop26h 42mMultiple Airlines
Deal found 5/30$262
Thu 6/64:15 pmYYZ - STL
1 stop15h 52mMultiple Airlines
Tue 6/117:29 pmSTL - YYZ
1 stop10h 06mMultiple Airlines
Deal found 5/30$264
Thu 6/64:15 pmYYZ - STL
1 stop15h 52mMultiple Airlines
Wed 6/127:29 pmSTL - YYZ
1 stop10h 13mMultiple Airlines
Deal found 5/30$272

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 2,784,634 searches. Data last updated May 30, 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.
Mon 6/1010:35 amYYZ - STL
1 stop25h 22mMultiple Airlines
Tue 6/113:23 pmSTL - YYZ
1 stop29h 02mMultiple Airlines
Deal found 5/30$248
Mon 6/1010:35 amYYZ - STL
1 stop21h 32mMultiple Airlines
Mon 6/177:29 pmSTL - YYZ
1 stop26h 16mMultiple Airlines
Deal found 5/30$251
Mon 6/1010:35 amYYZ - STL
1 stop21h 32mMultiple Airlines
Tue 6/113:23 pmSTL - YYZ
1 stop29h 02mMultiple Airlines
Deal found 5/29$254
Thu 6/64:15 pmYYZ - STL
1 stop15h 52mMultiple Airlines
Mon 6/177:29 pmSTL - YYZ
1 stop26h 16mMultiple Airlines
Deal found 5/30$256
Mon 6/1010:35 amYYZ - STL
1 stop21h 32mMultiple Airlines
Tue 6/117:29 pmSTL - YYZ
1 stop10h 06mMultiple Airlines
Deal found 5/30$259
Thu 6/64:15 pmYYZ - STL
1 stop15h 52mMultiple Airlines
Tue 6/1111:57 amSTL - YYZ
1 stop10h 29mMultiple Airlines
Deal found 5/30$261
Wed 6/510:35 amYYZ - STL
1 stop21h 32mMultiple Airlines
Tue 6/117:44 pmSTL - YYZ
1 stop26h 42mMultiple Airlines
Deal found 5/30$262
Thu 6/64:15 pmYYZ - STL
1 stop15h 52mMultiple Airlines
Tue 6/117:29 pmSTL - YYZ
1 stop10h 06mMultiple Airlines
Deal found 5/30$264
Thu 6/64:15 pmYYZ - STL
1 stop15h 52mMultiple Airlines
Wed 6/127:29 pmSTL - YYZ
1 stop10h 13mMultiple Airlines
Deal found 5/30$272

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 2,784,634 searches. Data last updated May 30, 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.
Fri 8/237:30 pmYUL - STL
Nonstop2h 35mMultiple Airlines
Sun 8/2512:00 pmSTL - YUL
Nonstop2h 23mMultiple Airlines
Deal found 5/28$412
Mon 7/12:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Thu 7/1110:10 amSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/29$428
Mon 7/12:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Thu 7/1110:10 amSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/30$429
Tue 7/22:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Sun 7/710:10 amSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/30$438
Tue 7/22:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Sun 7/710:10 amSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/29$439
Fri 7/196:55 pmYYZ - STL
Nonstop2h 06mMultiple Airlines
Sun 7/2110:10 amSTL - YYZ
Nonstop1h 59mMultiple Airlines
Deal found 5/29$443
Tue 7/92:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Wed 7/244:05 pmSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/29$454
Thu 7/47:30 pmYUL - STL
Nonstop2h 35mAir Canada
Sun 7/2111:30 amSTL - YUL
Nonstop2h 23mAir Canada
Deal found 5/29$458
Tue 7/302:15 pmYYZ - STL
Nonstop2h 06mUnited Airlines
Fri 8/24:05 pmSTL - YYZ
Nonstop1h 59mUnited Airlines
Deal found 5/29$459

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 2,784,634 searches. Data last updated May 30, 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.
Thu 6/64:15 pmYYZ - STL
1 stop15h 52mMultiple Airlines
Mon 6/177:29 pmSTL - YYZ
1 stop26h 16mMultiple Airlines
Deal found 5/30$256
Thu 6/64:15 pmYYZ - STL
1 stop15h 52mMultiple Airlines
Tue 6/1111:57 amSTL - YYZ
1 stop10h 29mMultiple Airlines
Deal found 5/30$261
Wed 6/510:35 amYYZ - STL
1 stop21h 32mMultiple Airlines
Tue 6/117:44 pmSTL - YYZ
1 stop26h 42mMultiple Airlines
Deal found 5/30$262
Thu 6/64:15 pmYYZ - STL
1 stop15h 52mMultiple Airlines
Tue 6/117:29 pmSTL - YYZ
1 stop10h 06mMultiple Airlines
Deal found 5/30$264
Thu 6/64:15 pmYYZ - STL
1 stop15h 52mMultiple Airlines
Wed 6/127:29 pmSTL - YYZ
1 stop10h 13mMultiple Airlines
Deal found 5/30$272
Fri 6/78:15 pmYYZ - STL
1 stop15h 19mMultiple Airlines
Mon 6/177:29 pmSTL - YYZ
1 stop26h 16mMultiple Airlines
Deal found 5/30$280
Wed 6/510:35 amYYZ - STL
1 stop21h 32mMultiple Airlines
Wed 6/268:16 amSTL - YYZ
1 stop14h 10mMultiple Airlines
Deal found 5/29$282
Fri 6/78:15 pmYYZ - STL
1 stop15h 19mMultiple Airlines
Tue 6/1111:57 amSTL - YYZ
1 stop10h 29mMultiple Airlines
Deal found 5/30$286
Thu 6/64:15 pmYYZ - STL
1 stop15h 52mMultiple Airlines
Mon 6/107:29 pmSTL - YYZ
1 stop23h 23mMultiple Airlines
Deal found 5/30$289

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 2,784,634 searches. Data last updated May 30, 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.
Tue 9/178:20 pmYYZ - STL
1 stop14h 58mMultiple Airlines
Deal found 5/30$147
Sat 9/146:30 amYYZ - STL
1 stop12h 00mMultiple Airlines
Deal found 5/29$167
Wed 6/1910:35 amYYZ - STL
1 stop21h 32mMultiple Airlines
Deal found 5/29$170
Mon 6/176:45 amYUL - STL
1 stop25h 22mMultiple Airlines
Deal found 5/30$172
Tue 6/116:50 amYUL - STL
1 stop8h 33mMultiple Airlines
Deal found 5/30$174
Mon 6/177:00 amYUL - STL
2 stops25h 07mMultiple Airlines
Deal found 5/30$175
Sat 6/226:30 amYYZ - STL
1 stop11h 58mMultiple Airlines
Deal found 5/29$189
Mon 6/106:50 amYUL - STL
2 stops29h 07mMultiple Airlines
Deal found 5/29$197
Sun 6/98:20 pmYYZ - STL
2 stops26h 39mMultiple Airlines
Deal found 5/29$198

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 2,784,634 searches. Data last updated May 30, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$248 - $476

Route

Depart

Return

Price

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 6/10

1 stop25h 22m

Lambert-St Louis

Tue 6/11

1 stop29h 02m

$248

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 6/10

1 stop21h 32m

Lambert-St Louis

Mon 6/17

1 stop26h 16m

$251

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 6/10

1 stop21h 32m

Lambert-St Louis

Tue 6/11

1 stop29h 02m

$254

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 6/11

1 stop8h 53m

Lambert-St Louis

Tue 6/11

1 stop26h 42m

$256

Montreal Pierre Elliott Trudeau IntlLambert-St Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 8/30

Nonstop2h 35m

Lambert-St Louis

Wed 9/4

1 stop6h 14m

$426

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 7/1

Nonstop2h 06m

Lambert-St Louis

Thu 7/11

Nonstop1h 59m

$428

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 7/2

1 stop14h 59m

Lambert-St Louis

Sun 7/7

1 stop4h 32m

$429

Montreal Pierre Elliott Trudeau IntlLambert-St Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 8/16

1 stop9h 43m

Lambert-St Louis

Wed 8/21

1 stop5h 54m

$435

Montreal Pierre Elliott Trudeau IntlLambert-St Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 6/28

1 stop25h 32m

Lambert-St Louis

Sun 6/30

1 stop16h 04m

$476

Flights are sorted by cheapest first

Deals found on 5/30

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

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

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Ontario 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.

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 30, 2024.
Peruse reviews from past customers who have flown with United Airlines, Air Canada and Delta 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.
Delta
8.0
Very good
10,457 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Food

7.4

Boarding

8.2

Crew

8.6

Overall

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Delta
8.0
Very good
10,457 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Food

7.4

Boarding

8.2

Crew

8.6

Overall

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

KLM
7.9
Good
1,520 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Food

7.4

Boarding

8.2

Crew

8.6

Overall

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

WestJet
7.5
Good
2,866 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Food

7.4

Boarding

8.2

Crew

8.6

Overall

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

United Airlines
7.4
Good
10,777 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Food

7.4

Boarding

8.2

Crew

8.6

Overall

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

American Airlines
7.3
Good
14,284 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Food

7.4

Boarding

8.2

Crew

8.6

Overall

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

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 $248, but on average you can expect to pay $298.

  • 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 $473.

  • 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?

    $222 is the cheapest one-way deal found within the past few days, from Sun Country Air. You may also be able to find cheap deals on United Airlines and Air Canada, with prices starting from $239 and $244, 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 $202. On average you can expect to pay $334. The most popular route, (Toronto Pearson Intl - Lambert-St Louis), can usually be booked for $254.

  • 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), Hamilton Airport (YHM), Toronto Island Airport (YTZ), Toronto Kitchener-Waterloo Airport (YKF), London Airport (YXU) 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 5/30.

  • What is the cheapest month to book a flight from Region of Ontario to St. Louis?

    Currently, September is the cheapest month in which you can book a flight from Region of Ontario to St. Louis (average of $319). Flying from Region of Ontario to St. Louis in July is currently the most expensive (average of $366). 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.

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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 2,784,634 searches. Data last updated May 30, 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$292Average$518FlexibilityNo cancel feeOn-time67%
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United AirlinesCheapest$329Average$550FlexibilityNo cancel feeOn-time69%
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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.
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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 30, 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
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