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Cheap flights from St. Louis to Ontario from C$ 167

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 14/5. 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 — YYZ
10 May — 17 May1
1 adult
Fri 10/5
Fri 17/5

How far in advance should I book a flight from St. Louis to Region of Ontario?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 24 days in advance, which can save you up to 128% on flights from St. Louis to Region of Ontario compared to booking the week you need them. Waiting 24 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at C$ 354. For sooner than that we have options available in the next 3 days from C$ 647.

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

March is one of the best times of the year to fly to Region of Ontario from St. Louis. Prices for March average C$ 502 per person but you can even find prices for as low as C$ 241. The most expensive prices can be found in the month of February. Opting for a March flight can save you 78% on your journey compared to booking in February

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

When flying from St. Louis to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap Delta flights from St. Louis to Ontario

Explore cheap flight options specifically provided by Delta for the route between St. Louis and Ontario. 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 464,223 searches. Data last updated 5 May 2024.
Find some of the cheapest Delta flights travelling from St. Louis to Ontario. Be sure to come back soon if the deals available don't appeal to you at this time.
Tue 16/76:00 a.m.STL - YYZ
1 stop9h 29mDelta
Sun 21/712:30 p.m.YYZ - STL
1 stop5h 50mDelta
Deal found 4/5C$ 691
Thu 6/66:11 a.m.STL - YYZ
1 stop4h 28mDelta
Wed 12/610:15 a.m.YYZ - STL
2 stops11h 22mDelta
Deal found 4/5C$ 780
Sat 15/610:05 a.m.STL - YYZ
2 stops11h 45mDelta
Wed 3/76:30 a.m.YYZ - STL
1 stop9h 00mDelta
Deal found 4/5C$ 854
Sat 15/610:05 a.m.STL - YYZ
2 stops11h 45mDelta
Wed 3/710:15 a.m.YYZ - STL
2 stops11h 22mDelta
Deal found 4/5C$ 959
Wed 11/92:05 p.m.STL - YYZ
2 stops7h 43mDelta
Sat 14/97:59 a.m.YYZ - STL
2 stops9h 35mDelta
Deal found 4/5C$ 1,275
Wed 22/52:18 p.m.STL - YYZ
2 stops7h 30mDelta
Sun 26/510:15 a.m.YYZ - STL
2 stops7h 21mDelta
Deal found 4/5C$ 1,512

Cheap United Airlines flights from St. Louis to Ontario

Explore cheap flight options specifically provided by United Airlines for the route between St. Louis and Ontario. 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 464,223 searches. Data last updated 5 May 2024.
Take a gander at the lowest prices we've found on United Airlines flights from St. Louis to Ontario. Deals are refreshing constantly so come back soon for more options.
Thu 30/511:38 a.m.STL - YYZ
1 stop8h 05mUnited Airlines
Mon 3/65:30 p.m.YYZ - STL
1 stop23h 11mUnited Airlines
Deal found 4/5C$ 723
Tue 16/74:05 p.m.STL - YYZ
Nonstop1h 59mUnited Airlines
Tue 23/72:15 p.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 4/5C$ 729
Mon 3/65:31 p.m.STL - YYZ
1 stop17h 21mUnited Airlines
Mon 10/69:00 p.m.YYZ - STL
1 stop18h 14mUnited Airlines
Deal found 4/5C$ 753
Wed 11/911:10 a.m.STL - YYZ
1 stop11h 48mUnited Airlines
Sat 14/98:05 a.m.YYZ - STL
1 stop8h 44mUnited Airlines
Deal found 4/5C$ 794
Sat 3/88:05 a.m.STL - YYZ
1 stop11h 38mUnited Airlines
Thu 8/82:15 p.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 3/5C$ 798
Sat 1/66:08 a.m.STL - YYZ
1 stop6h 39mUnited Airlines
Sat 8/67:30 a.m.YYZ - STL
2 stops7h 46mUnited Airlines
Deal found 4/5C$ 832
Tue 14/58:47 a.m.STL - YYZ
1 stop13h 01mUnited Airlines
Sun 2/66:55 p.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 4/5C$ 873
Sun 13/1010:15 a.m.STL - YYZ
1 stop8h 46mUnited Airlines
Sat 19/107:00 a.m.YYZ - STL
1 stop8h 48mUnited Airlines
Deal found 4/5C$ 932
Sun 13/104:05 p.m.STL - YYZ
Nonstop1h 54mUnited Airlines
Sat 19/107:00 a.m.YYZ - STL
1 stop8h 48mUnited Airlines
Deal found 4/5C$ 940

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

Find cheap flight options from St. Louis to Ontario specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 464,223 searches. Prices were last updated on 5 May 2024.
The lowest fares we've come across on flights travelling from St. Louis to Ontario in May and June 2024. If these deals don't appeal to you, be sure to come back soon for more options.
Thu 9/57:30 a.m.STL - YYZ
2 stops11h 05mMultiple Airlines
Sat 11/56:30 a.m.YYZ - STL
1 stop10h 55mMultiple Airlines
Deal found 4/5C$ 442
Wed 15/57:51 p.m.STL - YYZ
1 stop9h 51mMultiple Airlines
Sun 2/66:30 a.m.YYZ - STL
1 stop11h 59mMultiple Airlines
Deal found 4/5C$ 447
Sun 2/67:30 p.m.STL - YYZ
2 stops17h 30mMultiple Airlines
Sun 9/66:30 a.m.YYZ - STL
1 stop11h 02mMultiple Airlines
Deal found 3/5C$ 458
Tue 14/510:59 p.m.STL - YYZ
1 stop30h 43mMultiple Airlines
Sun 2/66:30 a.m.YYZ - STL
1 stop11h 59mMultiple Airlines
Deal found 4/5C$ 463
Sun 2/66:19 p.m.STL - YYZ
1 stop18h 41mMultiple Airlines
Sat 8/66:30 a.m.YYZ - STL
1 stop11h 58mMultiple Airlines
Deal found 4/5C$ 471
Wed 15/511:36 a.m.STL - YYZ
3 stops30h 59mMultiple Airlines
Sun 2/68:20 p.m.YYZ - STL
1 stop19h 54mMultiple Airlines
Deal found 4/5C$ 478
Sun 12/57:30 a.m.STL - YYZ
2 stops11h 05mMultiple Airlines
Sun 19/56:30 a.m.YYZ - STL
1 stop11h 59mMultiple Airlines
Deal found 4/5C$ 487
Mon 3/64:05 p.m.STL - YYZ
2 stops26h 30mMultiple Airlines
Mon 10/66:30 a.m.YYZ - STL
3 stops29h 27mMultiple Airlines
Deal found 4/5C$ 502
Sun 2/67:30 p.m.STL - YYZ
3 stops24h 25mMultiple Airlines
Sat 8/66:30 a.m.YYZ - STL
1 stop11h 58mMultiple Airlines
Deal found 4/5C$ 504

St. Louis to Ontario 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Ontario in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 464,223 searches. Data last updated 5 May 2024.
The lowest fares we've come across on flights travelling from St. Louis to Ontario in May and June 2024. If these deals don't appeal to you, be sure to come back soon for more options.
Thu 9/57:30 a.m.STL - YYZ
2 stops11h 05mMultiple Airlines
Sat 11/56:30 a.m.YYZ - STL
1 stop10h 55mMultiple Airlines
Deal found 4/5C$ 442
Wed 15/57:51 p.m.STL - YYZ
1 stop9h 51mMultiple Airlines
Sun 2/66:30 a.m.YYZ - STL
1 stop11h 59mMultiple Airlines
Deal found 4/5C$ 447
Sun 2/67:30 p.m.STL - YYZ
2 stops17h 30mMultiple Airlines
Sun 9/66:30 a.m.YYZ - STL
1 stop11h 02mMultiple Airlines
Deal found 3/5C$ 458
Tue 14/510:59 p.m.STL - YYZ
1 stop30h 43mMultiple Airlines
Sun 2/66:30 a.m.YYZ - STL
1 stop11h 59mMultiple Airlines
Deal found 4/5C$ 463
Sun 2/66:19 p.m.STL - YYZ
1 stop18h 41mMultiple Airlines
Sat 8/66:30 a.m.YYZ - STL
1 stop11h 58mMultiple Airlines
Deal found 4/5C$ 471
Wed 15/511:36 a.m.STL - YYZ
3 stops30h 59mMultiple Airlines
Sun 2/68:20 p.m.YYZ - STL
1 stop19h 54mMultiple Airlines
Deal found 4/5C$ 478
Sun 12/57:30 a.m.STL - YYZ
2 stops11h 05mMultiple Airlines
Sun 19/56:30 a.m.YYZ - STL
1 stop11h 59mMultiple Airlines
Deal found 4/5C$ 487
Tue 16/711:11 a.m.STL - YYZ
2 stops24h 04mMultiple Airlines
Tue 23/78:00 p.m.YYZ - STL
1 stop19h 17mMultiple Airlines
Deal found 3/5C$ 494
Mon 3/64:05 p.m.STL - YYZ
2 stops26h 30mMultiple Airlines
Mon 10/66:30 a.m.YYZ - STL
3 stops29h 27mMultiple Airlines
Deal found 4/5C$ 502

Direct flights to Ontario from St. Louis

Discover non-stop flight options from St. Louis to Ontario. 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 464,223 searches. Data last updated 5 May 2024.
For a quicker trip, book one of these direct flights from St. Louis to Ontario. If you're looking for other options for flights from St. Louis to Ontario, make sure to update the search form at the top of page.
Tue 16/74:05 p.m.STL - YYZ
Nonstop1h 59mUnited Airlines
Tue 23/72:15 p.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 4/5C$ 729
Tue 25/611:00 a.m.STL - YYZ
Nonstop1h 59mMultiple Airlines
Thu 27/62:15 p.m.YYZ - STL
Nonstop2h 06mMultiple Airlines
Deal found 3/5C$ 757
Fri 16/810:10 a.m.STL - YYZ
Nonstop1h 59mAir Canada
Mon 19/82:15 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 4/5C$ 785
Wed 22/59:50 a.m.STL - YYZ
Nonstop2h 01mAir Canada
Sun 26/56:55 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 4/5C$ 802
Wed 15/55:50 p.m.STL - YYZ
Nonstop2h 05mMultiple Airlines
Sun 2/66:55 p.m.YYZ - STL
Nonstop2h 06mMultiple Airlines
Deal found 4/5C$ 861
Sun 13/1010:10 a.m.STL - YYZ
Nonstop1h 54mAir Canada
Sat 19/106:55 p.m.YYZ - STL
Nonstop2h 05mAir Canada
Deal found 4/5C$ 992
Mon 3/69:50 a.m.STL - YYZ
Nonstop2h 01mAir Canada
Mon 10/62:15 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 4/5C$ 1,026
Sun 2/69:50 a.m.STL - YYZ
Nonstop2h 01mAir Canada
Sun 9/62:15 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 3/5C$ 1,226
Tue 16/710:10 a.m.STL - YYZ
Nonstop1h 59mUnited Airlines
Fri 19/72:15 p.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 4/5C$ 1,227

St. Louis to Ontario flights leaving soon

Find last-minute flight options from St. Louis to Ontario 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 464,223 searches. Data last updated 5 May 2024.
Users seeking a last-minute flight from St. Louis to Ontario should consider booking one of these fares. Users should be sure to double check the price, date, and time of their last-minute flight.
Wed 15/57:51 p.m.STL - YYZ
1 stop9h 51mMultiple Airlines
Sun 2/66:30 a.m.YYZ - STL
1 stop11h 59mMultiple Airlines
Deal found 4/5C$ 447
Tue 14/510:59 p.m.STL - YYZ
1 stop30h 43mMultiple Airlines
Sun 2/66:30 a.m.YYZ - STL
1 stop11h 59mMultiple Airlines
Deal found 4/5C$ 463
Wed 15/511:36 a.m.STL - YYZ
3 stops30h 59mMultiple Airlines
Sun 2/68:20 p.m.YYZ - STL
1 stop19h 54mMultiple Airlines
Deal found 4/5C$ 478
Sun 12/57:30 a.m.STL - YYZ
2 stops11h 05mMultiple Airlines
Sun 19/56:30 a.m.YYZ - STL
1 stop11h 59mMultiple Airlines
Deal found 4/5C$ 487
Wed 15/511:36 a.m.STL - YYZ
2 stops30h 59mMultiple Airlines
Sun 2/68:20 p.m.YYZ - STL
1 stop19h 54mMultiple Airlines
Deal found 4/5C$ 513
Tue 14/57:30 a.m.STL - YYZ
2 stops11h 05mMultiple Airlines
Sun 2/67:50 a.m.YYZ - STL
1 stop11h 50mMultiple Airlines
Deal found 4/5C$ 536
Tue 14/57:51 p.m.STL - YYZ
1 stop9h 51mMultiple Airlines
Wed 15/510:20 a.m.YYZ - STL
2 stops33h 20mMultiple Airlines
Deal found 4/5C$ 560
Tue 14/57:30 a.m.STL - YYZ
2 stops11h 05mMultiple Airlines
Wed 15/56:30 a.m.YYZ - STL
3 stops31h 20mMultiple Airlines
Deal found 4/5C$ 577
Wed 15/511:36 a.m.STL - YYZ
3 stops30h 59mMultiple Airlines
Sun 2/611:15 a.m.YYZ - STL
3 stops28h 59mMultiple Airlines
Deal found 4/5C$ 586

One-way flights to Ontario from St. Louis

Search for one-way flight options from St. Louis to Ontario. 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 464,223 searches. Data last updated 5 May 2024.
Take a look at some of the best available options we've come across on one-way flights from St. Louis to Ontario. Users needing a return flight from St. Louis to Ontario should utilize the search form above.
Tue 14/57:51 p.m.STL - YYZ
1 stop9h 51mMultiple Airlines
Deal found 4/5C$ 167
Tue 14/57:51 p.m.STL - YYZ
1 stop9h 51mMultiple Airlines
Deal found 4/5C$ 170
Sun 21/76:45 a.m.STL - YYZ
1 stop13h 30mSun Country Air
Deal found 5/5C$ 209
Tue 14/57:30 a.m.STL - YYZ
2 stops11h 05mMultiple Airlines
Deal found 4/5C$ 245
Tue 14/57:30 a.m.STL - YYZ
2 stops11h 05mMultiple Airlines
Deal found 4/5C$ 248
Fri 14/67:45 a.m.STL - YYZ
2 stops12h 12mMultiple Airlines
Deal found 4/5C$ 301
Fri 14/63:07 p.m.STL - YYZ
3 stops32h 35mMultiple Airlines
Deal found 4/5C$ 315
Sun 21/710:10 a.m.STL - YYZ
Nonstop1h 59mUnited Airlines
Deal found 5/5C$ 334
Fri 14/67:00 a.m.STL - YYZ
1 stop6h 59mAmerican Airlines
Deal found 4/5C$ 342

Find flights from St. Louis to Ontario within your budget

Customize your flight search to find flights from St. Louis to Ontario 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 464,223 searches. Data last updated 5 May 2024.

Fly from

Any airport

Fly to

Any airport

Budget

C$ 442 - C$ 858

Route

Depart

Return

Price

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 1/6

1 stop19h 45m

Toronto Pearson Intl

Sat 8/6

1 stop11h 58m

C$ 442

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 15/5

1 stop9h 51m

Toronto Pearson Intl

Sun 2/6

1 stop11h 59m

C$ 447

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 2/6

2 stops17h 30m

Toronto Pearson Intl

Sun 9/6

1 stop11h 02m

C$ 458

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 2/6

1 stop18h 41m

Toronto Pearson Intl

Sat 8/6

1 stop11h 58m

C$ 471

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 16/7

1 stop9h 29m

Toronto Pearson Intl

Sun 21/7

1 stop5h 50m

C$ 691

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 30/5

1 stop8h 05m

Toronto Pearson Intl

Mon 3/6

1 stop23h 11m

C$ 723

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 4/6

1 stop5h 00m

Toronto Pearson Intl

Fri 7/6

1 stop9h 18m

C$ 759

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 4/6

1 stop5h 27m

Toronto Pearson Intl

Fri 7/6

Nonstop2h 06m

C$ 770

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 16/7

2 stops10h 44m

Toronto Pearson Intl

Tue 23/7

1 stop5h 19m

C$ 858

Flights are sorted by cheapest first

Deals found on 4/5

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

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated 5 May 2024.
Read through reviews of airlines operating flights from St. Louis to Ontario, such as Delta, United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
10,826 reviews
Check prices

Comfort

7.9

Crew

8.6

Food

7.4

Boarding

8.2

Overall

8.1

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.1
Very good
10,826 reviews
Delta
8.1
Very good
10,826 reviews
Check prices

Comfort

7.9

Crew

8.6

Food

7.4

Boarding

8.2

Overall

8.1

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

WestJet
7.6
Good
2,966 reviews
Delta
8.1
Very good
10,826 reviews
Check prices

Comfort

7.9

Crew

8.6

Food

7.4

Boarding

8.2

Overall

8.1

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

United Airlines
7.4
Good
11,118 reviews
Delta
8.1
Very good
10,826 reviews
Check prices

Comfort

7.9

Crew

8.6

Food

7.4

Boarding

8.2

Overall

8.1

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

American Airlines
7.3
Good
14,713 reviews
Delta
8.1
Very good
10,826 reviews
Check prices

Comfort

7.9

Crew

8.6

Food

7.4

Boarding

8.2

Overall

8.1

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Sun Country Air
7.3
Good
647 reviews
Delta
8.1
Very good
10,826 reviews
Check prices

Comfort

7.9

Crew

8.6

Food

7.4

Boarding

8.2

Overall

8.1

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Related info for your journey

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

    If you book a flight to Ontario from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 20.4 km from the centre of St. Louis.

  • Can I find flights from St. Louis to Region of Ontario for under C$ 500 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Region of Ontario for under C$ 500. The cheapest flight booked recently is on Multiple Airlines for just C$ 442, but on average you can expect to pay C$ 523.

  • Are there direct flights from St. Louis to Region of Ontario for under C$ 800 on Cheapflights?

    Cheapflights has 12 direct flights from St. Louis to Region of Ontario under C$ 800. A good price for a direct flight from St. Louis to Region of Ontario is less than C$ 1,050.

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

    There are currently 20+ open flights from St. Louis to Region of Ontario within the next 7 days for less than C$ 500.

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

    For one-way options, check prices for Sun Country Air. According to our data, you can fly for as low as C$ 209. Users have also found prices from C$ 334 and C$ 342 on United Airlines and American Airlines, respectively.

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

    Before booking your flight to Region of Ontario from St. Louis, check out the most reliable airlines to get you to your destination on time: United Airlines (94%), Air Canada (89%), Jazz( 89%).

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

    The cheapest flight price from St. Louis to Region of Ontario is C$ 394. On average you can expect to pay C$ 647. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for C$ 393.

  • What does STL to YYZ mean?

    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! Ottawa Airport (YOW), Toronto Island Airport (YTZ), Hamilton Airport (YHM), London Airport (YXU), Toronto Kitchener-Waterloo Airport (YKF) are other airports near this flight route and their unique identifiers/IATA codes.

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

    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.

  • Can I find deals on flights from St. Louis to Ontario with specific airlines?

    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.

  • Can I find deals for flights from St. Louis to Ontario that include hotel bookings?

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

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

    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.

  • Can I find deals for business class 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.

  • Can I find deals for flights from St. Louis to Ontario that allow pets onboard?

    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.

  • Can I find deals on last-minute flights from St. Louis to Ontario?

    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.

  • How recently were the St. Louis to Region of Ontario flight deals updated?

    The St. Louis to Region of Ontario flight deals you see on this page were last updated on 4/5.

See more FAQs

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

St. Louis to Pierre Elliott Trudeau Intl flights
Kansas City to Vancouver Intl flights
St. Louis to Pearson Intl flights
Kansas City to Calgary flights
St. Louis to Calgary flights
St. Louis to Vancouver Intl flights
Kansas City to Pearson Intl flights
Kansas City to Pierre Elliott Trudeau Intl flights
St. Louis to Halifax flights
St. Louis to Edmonton flights
Kansas City to Québec City flights
Kansas City to Ottawa flights
St. Louis to Winnipeg flights
Joplin to Pierre Elliott Trudeau Intl flights
St. Louis to Saskatoon flights
Kansas City to Halifax flights
Springfield to Pearson Intl flights
Kansas City to Saskatoon flights
St. Louis to Charlottetown flights
Kansas City to Moncton flights
St. Louis to Québec City flights
St. Louis to Kelowna flights
Kansas City to Victoria flights

Top airline flying from St. Louis to Ontario

Discover the top airline that operate flights from St. Louis to Ontario. 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 464,223 searches. Data last updated 5 May 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 282AverageC$ 633FlexibilityNo cancel feeOn-time67%
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Toronto to Newfoundland and Labrador flights
Toronto to Hong Kong flights
Toronto to Grand Cayman flights
Toronto to England flights
Vancouver to Montreal flights
Montreal to Riyadh flights
Toronto to San Francisco flights
Toronto to Qatar flights
Halifax to Vancouver flights
Vancouver to Perth flights
Abbotsford to Winnipeg flights
St. Louis to Prince Edward Island flights

Search flights from St. Louis to Ontario by cabin class

Find flights from St. Louis to Ontario, 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 St. Louis to Ontario

Find hourly flight availability from St. Louis to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 5 May 2024.
1%of flight departuresEarly morningMidnight to 6 am
43%of flight departuresMorning6 am to noon
56%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St. Louis to Ontario?

Cheapflights helps you search for flights from St. Louis to Ontario via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Ontario?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario from St. Louis.

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

Certainly. Search results for flights to Ontario from St. Louis shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes! Start tracking prices for St. Louis to Ontario 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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