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Cheap flights from St. Louis to Ontario from C$ 154

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 11/6. 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.
STL — YYZ
21 Touko — 28 Touko1
1 adult
ti 21/5
ti 28/5

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$ 353. For sooner than that we have options available in the next 3 days from C$ 644.

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$ 496 per person but you can even find prices for as low as C$ 240. The most expensive prices can be found in the month of February. Opting for a March flight can save you 80% 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 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 408,931 searches. Data last updated 16 toukokuu 2024.
Find some of the cheapest United Airlines 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.
pe 21/65:31 p.m.STL - YYZ
1 stop5h 27mUnited Airlines
su 14/72:15 p.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 14/5C$ 616
ma 3/65:31 p.m.STL - YYZ
1 stop5h 27mUnited Airlines
pe 14/67:55 a.m.YYZ - STL
1 stop5h 18mUnited Airlines
Deal found 14/5C$ 638
la 13/75:30 p.m.STL - YYZ
2 stops18h 23mUnited Airlines
pe 19/77:00 a.m.YYZ - STL
1 stop4h 25mUnited Airlines
Deal found 14/5C$ 644
ma 24/66:08 a.m.STL - YYZ
1 stop6h 39mUnited Airlines
ti 25/67:00 a.m.YYZ - STL
2 stops8h 14mUnited Airlines
Deal found 14/5C$ 650
la 7/95:20 p.m.STL - YUL
2 stops15h 51mUnited Airlines
pe 13/96:40 p.m.YUL - STL
2 stops16h 27mUnited Airlines
Deal found 15/5C$ 824
la 25/510:15 a.m.STL - YYZ
1 stop4h 28mUnited Airlines
la 25/57:43 p.m.YYZ - STL
1 stop14h 49mUnited Airlines
Deal found 13/5C$ 839
pe 24/510:15 a.m.STL - YYZ
1 stop4h 28mUnited Airlines
pe 24/56:55 p.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 13/5C$ 1,258
to 23/56:30 a.m.STL - YYZ
1 stop4h 22mUnited Airlines
pe 24/56:55 p.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 13/5C$ 1,354
pe 12/712:00 p.m.STL - YUL
Nonstop2h 23mUnited Airlines
ma 15/77:30 p.m.YUL - STL
Nonstop2h 35mUnited Airlines
Deal found 15/5C$ 1,553

Cheap Air Canada flights from St. Louis to Ontario

Explore cheap flight options specifically provided by Air Canada 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 408,931 searches. Data last updated 16 toukokuu 2024.
Take a gander at the lowest prices we've found on Air Canada flights from St. Louis to Ontario. Deals are refreshing constantly so come back soon for more options.
ke 29/59:50 a.m.STL - YYZ
Nonstop2h 01mAir Canada
su 16/66:55 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 14/5C$ 604
ma 3/65:31 p.m.STL - YYZ
1 stop5h 27mAir Canada
to 13/62:15 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 14/5C$ 617
pe 21/65:31 p.m.STL - YYZ
1 stop5h 27mAir Canada
la 6/78:05 a.m.YYZ - STL
1 stop7h 31mAir Canada
Deal found 14/5C$ 624
ke 17/710:10 a.m.STL - YUL
1 stop7h 08mAir Canada
ke 24/711:10 a.m.YUL - STL
1 stop5h 11mAir Canada
Deal found 15/5C$ 642
ti 11/69:50 a.m.STL - YYZ
Nonstop2h 01mAir Canada
ti 18/62:15 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 14/5C$ 693
ke 5/65:31 p.m.STL - YYZ
1 stop5h 27mAir Canada
la 8/62:15 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 14/5C$ 706
ke 22/59:50 a.m.STL - YYZ
Nonstop2h 01mAir Canada
ke 29/52:15 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 14/5C$ 721
ke 22/59:50 a.m.STL - YYZ
Nonstop2h 01mAir Canada
ke 29/55:00 p.m.YYZ - STL
1 stop5h 05mAir Canada
Deal found 14/5C$ 728
ke 17/712:00 p.m.STL - YUL
Nonstop2h 23mAir Canada
ke 24/79:10 a.m.YUL - STL
1 stop7h 11mAir Canada
Deal found 15/5C$ 732

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 408,931 searches. Prices were last updated on 16 toukokuu 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.
pe 7/66:10 p.m.STL - YYZ
2 stops24h 25mMultiple Airlines
ti 11/68:20 p.m.YYZ - STL
1 stop17h 45mMultiple Airlines
Deal found 14/5C$ 369
to 13/68:12 p.m.STL - YYZ
2 stops16h 48mMultiple Airlines
to 20/66:30 a.m.YYZ - STL
1 stop11h 58mMultiple Airlines
Deal found 14/5C$ 386
to 13/68:12 p.m.STL - YYZ
1 stop17h 16mMultiple Airlines
to 20/66:30 a.m.YYZ - STL
1 stop11h 58mMultiple Airlines
Deal found 14/5C$ 394
ti 11/611:57 a.m.STL - YUL
3 stops23h 18mMultiple Airlines
ti 18/66:50 a.m.YUL - STL
1 stop8h 33mMultiple Airlines
Deal found 14/5C$ 410
pe 7/66:10 p.m.STL - YYZ
2 stops24h 25mMultiple Airlines
ti 11/62:40 p.m.YYZ - STL
2 stops23h 25mMultiple Airlines
Deal found 14/5C$ 426
pe 7/67:29 p.m.STL - YYZ
1 stop10h 13mMultiple Airlines
ti 11/66:30 a.m.YYZ - STL
1 stop8h 53mMultiple Airlines
Deal found 14/5C$ 435
pe 7/66:10 p.m.STL - YYZ
2 stops24h 25mMultiple Airlines
ti 11/611:59 a.m.YYZ - STL
3 stops26h 06mMultiple Airlines
Deal found 14/5C$ 443
la 22/611:34 a.m.STL - YYZ
1 stop11h 28mMultiple Airlines
ti 2/76:30 a.m.YYZ - STL
1 stop8h 53mMultiple Airlines
Deal found 15/5C$ 446
to 6/67:45 a.m.STL - YYZ
2 stops10h 50mMultiple Airlines
ke 12/62:00 p.m.YYZ - STL
1 stop28h 28mMultiple Airlines
Deal found 14/5C$ 447

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 408,931 searches. Data last updated 16 toukokuu 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.
pe 7/66:10 p.m.STL - YYZ
2 stops24h 25mMultiple Airlines
ti 11/68:20 p.m.YYZ - STL
1 stop17h 45mMultiple Airlines
Deal found 14/5C$ 369
to 13/68:12 p.m.STL - YYZ
2 stops16h 48mMultiple Airlines
to 20/66:30 a.m.YYZ - STL
1 stop11h 58mMultiple Airlines
Deal found 14/5C$ 386
to 13/68:12 p.m.STL - YYZ
1 stop17h 16mMultiple Airlines
to 20/66:30 a.m.YYZ - STL
1 stop11h 58mMultiple Airlines
Deal found 14/5C$ 394
ti 11/611:57 a.m.STL - YUL
3 stops23h 18mMultiple Airlines
ti 18/66:50 a.m.YUL - STL
1 stop8h 33mMultiple Airlines
Deal found 14/5C$ 410
pe 7/66:10 p.m.STL - YYZ
2 stops24h 25mMultiple Airlines
ti 11/62:40 p.m.YYZ - STL
2 stops23h 25mMultiple Airlines
Deal found 14/5C$ 426
pe 7/67:29 p.m.STL - YYZ
1 stop10h 13mMultiple Airlines
ti 11/66:30 a.m.YYZ - STL
1 stop8h 53mMultiple Airlines
Deal found 14/5C$ 435
pe 7/66:10 p.m.STL - YYZ
2 stops24h 25mMultiple Airlines
ti 11/611:59 a.m.YYZ - STL
3 stops26h 06mMultiple Airlines
Deal found 14/5C$ 443
la 22/611:34 a.m.STL - YYZ
1 stop11h 28mMultiple Airlines
ti 2/76:30 a.m.YYZ - STL
1 stop8h 53mMultiple Airlines
Deal found 15/5C$ 446
to 6/67:45 a.m.STL - YYZ
2 stops10h 50mMultiple Airlines
ke 12/62:00 p.m.YYZ - STL
1 stop28h 28mMultiple Airlines
Deal found 14/5C$ 447

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 408,931 searches. Data last updated 16 toukokuu 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.
ti 28/59:50 a.m.STL - YYZ
Nonstop2h 01mAir Canada
ke 19/62:15 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 14/5C$ 604
to 20/611:00 a.m.STL - YYZ
Nonstop1h 59mAir Canada
to 27/62:15 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 14/5C$ 693
ma 24/64:05 p.m.STL - YYZ
Nonstop1h 59mAir Canada
to 27/62:15 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 15/5C$ 726
la 22/64:05 p.m.STL - YYZ
Nonstop1h 59mAir Canada
ti 2/72:15 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 15/5C$ 732
ti 6/812:00 p.m.STL - YUL
Nonstop2h 23mAir Canada
la 17/87:30 p.m.YUL - STL
Nonstop2h 35mAir Canada
Deal found 15/5C$ 771
ke 11/910:10 a.m.STL - YYZ
Nonstop1h 54mAir Canada
la 14/92:15 p.m.YYZ - STL
Nonstop2h 05mAir Canada
Deal found 15/5C$ 782
ma 12/84:05 p.m.STL - YYZ
Nonstop1h 59mUnited Airlines
pe 30/82:15 p.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 15/5C$ 783
to 13/69:50 a.m.STL - YYZ
Nonstop2h 01mAir Canada
to 20/66:55 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 14/5C$ 796
su 2/69:50 a.m.STL - YYZ
Nonstop2h 01mAir Canada
to 6/66:55 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 15/5C$ 798

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 408,931 searches. Data last updated 16 toukokuu 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.
la 25/511:39 a.m.STL - YYZ
3 stops30h 56mMultiple Airlines
ti 28/58:20 p.m.YYZ - STL
1 stop15h 26mMultiple Airlines
Deal found 14/5C$ 516
la 25/512:45 p.m.STL - YYZ
2 stops29h 50mMultiple Airlines
ti 28/58:00 p.m.YYZ - STL
1 stop15h 13mMultiple Airlines
Deal found 14/5C$ 559
la 25/511:39 a.m.STL - YYZ
3 stops30h 56mMultiple Airlines
ti 28/58:00 a.m.YYZ - STL
3 stops27h 46mMultiple Airlines
Deal found 14/5C$ 590
la 25/511:39 a.m.STL - YYZ
3 stops30h 56mMultiple Airlines
ti 28/52:00 p.m.YYZ - STL
2 stops21h 46mMultiple Airlines
Deal found 14/5C$ 593
la 25/512:45 p.m.STL - YYZ
2 stops7h 12mMultiple Airlines
su 26/57:40 a.m.YYZ - STL
1 stop12h 00mMultiple Airlines
Deal found 13/5C$ 621
la 25/55:07 p.m.STL - YYZ
1 stop5h 50mMultiple Airlines
ti 28/58:00 p.m.YYZ - STL
1 stop15h 13mMultiple Airlines
Deal found 14/5C$ 692
ke 22/59:50 a.m.STL - YYZ
Nonstop2h 01mAir Canada
ke 29/52:15 p.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 14/5C$ 721
ke 22/59:50 a.m.STL - YYZ
Nonstop2h 01mAir Canada
ke 29/55:00 p.m.YYZ - STL
1 stop5h 05mAir Canada
Deal found 14/5C$ 728
to 23/57:45 a.m.STL - YYZ
2 stops10h 50mMultiple Airlines
la 25/58:30 p.m.YYZ - STL
1 stop11h 38mMultiple Airlines
Deal found 13/5C$ 730

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 408,931 searches. Data last updated 16 toukokuu 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.
ti 11/611:57 a.m.STL - YYZ
1 stop10h 29mMultiple Airlines
Deal found 15/5C$ 154
ti 11/611:57 a.m.STL - YYZ
1 stop10h 29mMultiple Airlines
Deal found 15/5C$ 155
ke 29/59:10 p.m.STL - YYZ
1 stop25h 16mMultiple Airlines
Deal found 14/5C$ 168
ke 29/59:10 p.m.STL - YYZ
1 stop25h 16mMultiple Airlines
Deal found 14/5C$ 169
to 13/67:45 a.m.STL - YYZ
2 stops10h 50mMultiple Airlines
Deal found 15/5C$ 174
to 13/68:12 p.m.STL - YYZ
1 stop26h 14mMultiple Airlines
Deal found 15/5C$ 178
la 1/69:29 p.m.STL - YYZ
1 stop11h 24mMultiple Airlines
Deal found 14/5C$ 180
ti 28/52:12 p.m.STL - YYZ
1 stop15h 23mMultiple Airlines
Deal found 14/5C$ 183
ti 28/52:12 p.m.STL - YYZ
1 stop15h 23mMultiple Airlines
Deal found 14/5C$ 184

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 408,931 searches. Data last updated 16 toukokuu 2024.

Fly from

Any airport

Fly to

Any airport

Budget

C$ 312 - C$ 741

Route

Depart

Return

Price

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

ti 11/6

2 stops23h 18m

Toronto Pearson Intl

ti 18/6

1 stop8h 53m

C$ 312

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

ti 11/6

3 stops25h 03m

Toronto Pearson Intl

ti 18/6

1 stop8h 53m

C$ 346

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

ti 4/6

1 stop9h 51m

Toronto Pearson Intl

ti 11/6

1 stop17h 45m

C$ 347

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

ti 4/6

2 stops10h 50m

Toronto Pearson Intl

ti 11/6

1 stop17h 45m

C$ 356

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

ti 4/6

1 stop8h 49m

Toronto Pearson Intl

ke 12/6

1 stop9h 05m

C$ 602

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

ke 29/5

Nonstop2h 01m

Toronto Pearson Intl

su 16/6

Nonstop2h 06m

C$ 604

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

pe 21/6

1 stop5h 27m

Toronto Pearson Intl

su 14/7

Nonstop2h 06m

C$ 616

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

ma 24/6

1 stop8h 44m

Toronto Pearson Intl

ti 25/6

1 stop5h 40m

C$ 634

Lambert-St LouisMontreal Pierre Elliott Trudeau Intl

STL - YUL

STLYUL

Lambert-St Louis

la 6/7

2 stops36h 44m

Montreal Pierre Elliott Trudeau Intl

pe 12/7

1 stop15h 08m

C$ 741

Flights are sorted by cheapest first

Deals found on 14/5

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 16 toukokuu 2024.
Read through reviews of airlines operating flights from St. Louis to Ontario, such as United Airlines, Air Canada and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,691 reviews
Check prices

Boarding

8.2

Entertainment

8.0

Overall

8.0

Food

7.4

Comfort

7.9

Crew

8.6

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
8.0
Very good
10,691 reviews
Delta
8.0
Very good
10,691 reviews
Check prices

Boarding

8.2

Entertainment

8.0

Overall

8.0

Food

7.4

Comfort

7.9

Crew

8.6

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
7.5
Good
2,920 reviews
Delta
8.0
Very good
10,691 reviews
Check prices

Boarding

8.2

Entertainment

8.0

Overall

8.0

Food

7.4

Comfort

7.9

Crew

8.6

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
10,946 reviews
Delta
8.0
Very good
10,691 reviews
Check prices

Boarding

8.2

Entertainment

8.0

Overall

8.0

Food

7.4

Comfort

7.9

Crew

8.6

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
14,535 reviews
Delta
8.0
Very good
10,691 reviews
Check prices

Boarding

8.2

Entertainment

8.0

Overall

8.0

Food

7.4

Comfort

7.9

Crew

8.6

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
7.2
Good
632 reviews
Delta
8.0
Very good
10,691 reviews
Check prices

Boarding

8.2

Entertainment

8.0

Overall

8.0

Food

7.4

Comfort

7.9

Crew

8.6

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$ 400 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Region of Ontario for under C$ 400. The cheapest flight booked recently is on Multiple Airlines for just C$ 312, but on average you can expect to pay C$ 383.

  • Are there direct flights from St. Louis to Region of Ontario for under C$ 700 on Cheapflights?

    Cheapflights has 20 direct flights from St. Louis to Region of Ontario under C$ 700. A good price for a direct flight from St. Louis to Region of Ontario is less than C$ 1,014.

  • Are there last-minute flights available from St. Louis to Region of Ontario for under C$ 600?

    There are currently 20+ open flights from St. Louis to Region of Ontario within the next 7 days for less than C$ 600.

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

    The most popular flight routes from St. Louis to Region of Ontario are Lambert-St Louis - Toronto Pearson Intl, Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl and Lambert-St Louis - London.

  • 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$ 891. On average you can expect to pay C$ 927. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for C$ 347.

  • 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 15/5.

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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.

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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 408,931 searches. Data last updated 16 toukokuu 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 282AverageC$ 630FlexibilityNo cancel feeOn-time67%
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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.
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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 16 toukokuu 2024.
0%of flight departuresEarly morningMidnight to 6 am
50%of flight departuresMorning6 am to noon
50%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
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6 AM
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6 PM

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Fly with Cheapflights

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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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