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Cheap flights from Ontario to St. Louis (STL) from $140

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 5/30. 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 10 — May 171
From?
To?
Fri 5/10
Fri 5/17
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 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 2,795,183 searches. Data last updated May 5, 2024.
Peruse some of the lowest-priced Delta 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.
Wed 6/1910:15 amYYZ - STL
1 stop8h 56mDelta
Mon 6/243:10 pmSTL - YYZ
1 stop6h 38mDelta
Deal found 5/5$427
Wed 6/196:25 amYYZ - STL
1 stop9h 05mDelta
Mon 6/245:25 pmSTL - YYZ
1 stop5h 34mDelta
Deal found 5/4$428
Thu 8/157:45 amYYZ - STL
1 stop6h 13mDelta
Sun 8/183:30 pmSTL - YYZ
1 stop6h 44mDelta
Deal found 5/5$444
Sun 8/255:45 pmYYZ - STL
1 stop3h 47mDelta
Fri 8/306:00 pmSTL - YYZ
1 stop3h 50mDelta
Deal found 5/4$477
Tue 8/2711:25 amYYZ - STL
1 stop5h 32mDelta
Fri 8/306:00 pmSTL - YYZ
1 stop3h 50mDelta
Deal found 5/4$478
Sun 8/255:45 pmYYZ - STL
1 stop3h 47mDelta
Thu 8/293:30 pmSTL - YYZ
1 stop6h 44mDelta
Deal found 5/4$585
Tue 8/276:15 amYYZ - STL
1 stop5h 32mDelta
Thu 8/295:40 pmSTL - YYZ
1 stop4h 34mDelta
Deal found 5/4$692
Sun 8/255:45 pmYYZ - STL
1 stop3h 47mDelta
Wed 8/286:45 amSTL - YYZ
2 stops10h 21mDelta
Deal found 5/4$736
Mon 8/266:15 amYYZ - STL
1 stop5h 32mDelta
Fri 8/3010:10 amSTL - YYZ
1 stop6h 00mDelta
Deal found 5/4$892

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 2,795,183 searches. Data last updated May 5, 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.
Tue 7/22:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Sun 7/712:00 pmSTL - YYZ
1 stop5h 52mAir Canada
Deal found 5/4$438
Sat 6/82:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Sat 6/155:31 pmSTL - YYZ
1 stop5h 27mAir Canada
Deal found 5/3$439
Wed 5/292:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Sat 6/15:31 pmSTL - YYZ
1 stop5h 27mAir Canada
Deal found 5/4$451
Tue 6/46:55 pmYYZ - STL
Nonstop2h 06mAir Canada
Sat 6/85:31 pmSTL - YYZ
1 stop5h 27mAir Canada
Deal found 5/4$452
Wed 6/1912:00 pmYYZ - STL
1 stop4h 41mAir Canada
Mon 6/2411:00 amSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/5$458
Wed 6/192:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Mon 6/245:31 pmSTL - YYZ
1 stop5h 27mAir Canada
Deal found 5/4$468
Sun 8/252:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Fri 8/304:05 pmSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/4$521
Sun 8/258:05 amYYZ - STL
1 stop5h 17mAir Canada
Fri 8/304:05 pmSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/4$526
Tue 8/279:00 amYYZ - STL
1 stop4h 22mAir Canada
Fri 8/304:05 pmSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/4$530

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 2,795,183 searches. Prices were last updated on May 5, 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 5/266:30 amYYZ - STL
1 stop11h 59mMultiple Airlines
Thu 5/307:45 amSTL - YYZ
2 stops10h 50mMultiple Airlines
Deal found 5/4$276
Sun 5/266:30 amYYZ - STL
1 stop11h 59mMultiple Airlines
Thu 5/307:30 pmSTL - YYZ
1 stop26h 56mMultiple Airlines
Deal found 5/4$288
Tue 5/218:20 pmYYZ - STL
1 stop15h 26mMultiple Airlines
Sat 5/2511:39 amSTL - YYZ
1 stop10h 47mMultiple Airlines
Deal found 5/4$300
Tue 5/218:20 pmYYZ - STL
1 stop15h 26mMultiple Airlines
Sat 5/255:15 pmSTL - YYZ
3 stops25h 20mMultiple Airlines
Deal found 5/4$303
Thu 5/306:30 amYYZ - STL
1 stop11h 59mMultiple Airlines
Mon 6/34:05 pmSTL - YYZ
2 stops26h 30mMultiple Airlines
Deal found 5/4$308
Thu 5/306:30 amYYZ - STL
1 stop11h 59mMultiple Airlines
Mon 6/34:45 pmSTL - YYZ
3 stops36h 50mMultiple Airlines
Deal found 5/4$346
Sun 5/266:30 amYYZ - STL
1 stop11h 59mMultiple Airlines
Thu 5/306:19 pmSTL - YYZ
3 stops25h 41mMultiple Airlines
Deal found 5/4$355
Tue 5/2110:30 amYYZ - STL
2 stops25h 16mMultiple Airlines
Sat 5/2511:39 amSTL - YYZ
1 stop10h 47mMultiple Airlines
Deal found 5/4$357
Wed 5/297:50 amYYZ - STL
1 stop13h 20mMultiple Airlines
Sat 6/15:15 pmSTL - YYZ
1 stop19h 45mMultiple Airlines
Deal found 5/4$359

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 2,795,183 searches. Data last updated May 5, 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 5/266:30 amYYZ - STL
1 stop11h 59mMultiple Airlines
Thu 5/307:45 amSTL - YYZ
2 stops10h 50mMultiple Airlines
Deal found 5/4$276
Sun 5/266:30 amYYZ - STL
1 stop11h 59mMultiple Airlines
Thu 5/307:30 pmSTL - YYZ
1 stop26h 56mMultiple Airlines
Deal found 5/4$288
Tue 5/218:20 pmYYZ - STL
1 stop15h 26mMultiple Airlines
Sat 5/2511:39 amSTL - YYZ
1 stop10h 47mMultiple Airlines
Deal found 5/4$300
Tue 5/218:20 pmYYZ - STL
1 stop15h 26mMultiple Airlines
Sat 5/255:15 pmSTL - YYZ
3 stops25h 20mMultiple Airlines
Deal found 5/4$303
Thu 5/306:30 amYYZ - STL
1 stop11h 59mMultiple Airlines
Mon 6/34:05 pmSTL - YYZ
2 stops26h 30mMultiple Airlines
Deal found 5/4$308
Thu 5/306:30 amYYZ - STL
1 stop11h 59mMultiple Airlines
Mon 6/34:45 pmSTL - YYZ
3 stops36h 50mMultiple Airlines
Deal found 5/4$346
Sun 5/266:30 amYYZ - STL
1 stop11h 59mMultiple Airlines
Thu 5/306:19 pmSTL - YYZ
3 stops25h 41mMultiple Airlines
Deal found 5/4$355
Tue 5/2110:30 amYYZ - STL
2 stops25h 16mMultiple Airlines
Sat 5/2511:39 amSTL - YYZ
1 stop10h 47mMultiple Airlines
Deal found 5/4$357
Wed 5/297:50 amYYZ - STL
1 stop13h 20mMultiple Airlines
Sat 6/15:15 pmSTL - YYZ
1 stop19h 45mMultiple Airlines
Deal found 5/4$359

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 2,795,183 searches. Data last updated May 5, 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.
Wed 5/296:55 pmYYZ - STL
Nonstop2h 06mMultiple Airlines
Sat 6/19:50 amSTL - YYZ
Nonstop2h 01mMultiple Airlines
Deal found 5/4$442
Tue 7/22:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Sun 7/710:10 amSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/4$453
Wed 5/296:55 pmYYZ - STL
Nonstop2h 06mMultiple Airlines
Sat 6/19:50 amSTL - YYZ
Nonstop2h 01mMultiple Airlines
Deal found 5/4$466
Wed 6/192:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Mon 6/2411:00 amSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/5$467
Wed 6/192:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Mon 6/2411:00 amSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/4$468
Wed 5/222:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Sun 5/269:50 amSTL - YYZ
Nonstop2h 01mAir Canada
Deal found 5/4$476
Fri 6/212:15 pmYYZ - STL
Nonstop2h 06mMultiple Airlines
Sun 6/234:05 pmSTL - YYZ
Nonstop1h 59mMultiple Airlines
Deal found 5/4$482
Fri 6/282:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Mon 7/110:10 amSTL - YYZ
Nonstop1h 59mAir Canada
Deal found 5/5$506
Tue 8/276:55 pmYYZ - STL
Nonstop2h 06mMultiple Airlines
Thu 8/2910:10 amSTL - YYZ
Nonstop1h 59mMultiple Airlines
Deal found 5/4$515

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 2,795,183 searches. Data last updated May 5, 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.
Sat 5/116:30 amYYZ - STL
1 stop10h 55mMultiple Airlines
Mon 5/139:11 pmSTL - YYZ
1 stop25h 15mMultiple Airlines
Deal found 5/4$417
Sat 5/116:30 amYYZ - STL
1 stop10h 55mMultiple Airlines
Mon 5/134:05 pmSTL - YYZ
2 stops26h 30mMultiple Airlines
Deal found 5/4$447
Sat 5/116:30 amYYZ - STL
1 stop10h 55mMultiple Airlines
Mon 5/139:35 amSTL - YYZ
3 stops25h 10mMultiple Airlines
Deal found 5/4$461
Sat 5/112:00 pmYYZ - STL
3 stops28h 29mMultiple Airlines
Mon 5/134:05 pmSTL - YYZ
2 stops26h 30mMultiple Airlines
Deal found 5/4$570
Sat 5/112:00 pmYYZ - STL
3 stops28h 29mMultiple Airlines
Mon 5/139:35 amSTL - YYZ
3 stops25h 10mMultiple Airlines
Deal found 5/4$579
Fri 5/104:15 pmYOW - STL
1 stop19h 13mMultiple Airlines
Sun 5/127:51 pmSTL - YOW
2 stops14h 07mMultiple Airlines
Deal found 5/4$670
Sat 5/116:04 amYYZ - STL
1 stop4h 15mWestJet
Tue 5/146:30 pmSTL - YYZ
1 stop4h 27mWestJet
Deal found 5/4$684
Sat 5/111:25 pmYYZ - STL
1 stop6h 16mWestJet
Tue 5/146:11 amSTL - YYZ
1 stop4h 28mWestJet
Deal found 5/3$685
Sat 5/112:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Mon 5/135:25 pmSTL - YYZ
1 stop5h 33mAir Canada
Deal found 5/3$698

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 2,795,183 searches. Data last updated May 5, 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 5/306:30 amYYZ - STL
1 stop11h 59mMultiple Airlines
Deal found 5/4$140
Thu 5/306:30 amYYZ - STL
1 stop11h 59mMultiple Airlines
Deal found 5/4$149
Wed 5/298:00 pmYYZ - STL
1 stop15h 13mMultiple Airlines
Deal found 5/4$182
Thu 10/38:15 pmYYZ - STL
1 stop11h 47mMultiple Airlines
Deal found 5/4$203
Thu 5/308:20 pmYYZ - STL
2 stops17h 08mMultiple Airlines
Deal found 5/4$210
Thu 5/302:40 pmYYZ - STL
2 stops26h 25mMultiple Airlines
Deal found 5/4$222
Sun 7/214:00 pmYYZ - STL
2 stops25h 05mMultiple Airlines
Deal found 5/4$223
Thu 5/306:30 amYYZ - STL
3 stops30h 35mMultiple Airlines
Deal found 5/4$226
Thu 5/306:30 amYYZ - STL
3 stops30h 35mMultiple Airlines
Deal found 5/4$236

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 2,795,183 searches. Data last updated May 5, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$276 - $490

Route

Depart

Return

Price

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 5/26

1 stop11h 59m

Lambert-St Louis

Thu 5/30

2 stops10h 50m

$276

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 5/26

1 stop11h 59m

Lambert-St Louis

Thu 5/30

1 stop26h 56m

$288

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 5/21

1 stop15h 26m

Lambert-St Louis

Sat 5/25

1 stop10h 47m

$300

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 5/21

1 stop15h 26m

Lambert-St Louis

Sat 5/25

3 stops25h 20m

$303

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 6/19

1 stop8h 56m

Lambert-St Louis

Mon 6/24

1 stop6h 38m

$427

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 7/2

Nonstop2h 06m

Lambert-St Louis

Sun 7/7

1 stop5h 52m

$438

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 6/5

1 stop5h 12m

Lambert-St Louis

Sat 6/8

1 stop4h 57m

$443

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 6/5

Nonstop2h 06m

Lambert-St Louis

Wed 6/12

1 stop6h 39m

$453

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 6/5

2 stops10h 53m

Lambert-St Louis

Wed 6/12

1 stop4h 57m

$490

Flights are sorted by cheapest first

Deals found on 5/4

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 5, 2024.
Peruse reviews from past customers who have flown with Delta, Air Canada 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
9,134 reviews
Check prices

Crew

8.6

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Reviews

1 / 10

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

Alaska Airlines
8.1
Very good
9,134 reviews
Alaska Airlines
8.1
Very good
9,134 reviews
Check prices

Crew

8.6

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Reviews

1 / 10

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

Delta
8.1
Very good
10,826 reviews
Alaska Airlines
8.1
Very good
9,134 reviews
Check prices

Crew

8.6

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Reviews

1 / 10

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

WestJet
7.6
Good
2,966 reviews
Alaska Airlines
8.1
Very good
9,134 reviews
Check prices

Crew

8.6

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Reviews

1 / 10

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

United Airlines
7.4
Good
11,118 reviews
Alaska Airlines
8.1
Very good
9,134 reviews
Check prices

Crew

8.6

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Reviews

1 / 10

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

American Airlines
7.3
Good
14,713 reviews
Alaska Airlines
8.1
Very good
9,134 reviews
Check prices

Crew

8.6

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

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 $276, but on average you can expect to pay $363.

  • 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 $572.

  • Are there last-minute flights available from Region of Ontario to St. Louis for under $500?

    There are currently 15+ open flights from Region of Ontario to St. Louis within the next 7 days for less than $500.

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

    $238 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Air Canada and Delta, with prices starting from $244 and $250, respectively.

  • 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 (62%), Jazz (62%), United Airlines (62%).

  • 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 $373. The most popular route, (Toronto Pearson Intl - Lambert-St Louis), can usually be booked for $242.

  • 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 5/4.

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 2,795,183 searches. Data last updated May 5, 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$295Average$515FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$329Average$494FlexibilityNo 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 5, 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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