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Cheap flights from St. Louis (STL) to Ontario from $113

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/10. 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
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 St. Louis to Region of Ontario?

To save on the cost of your flight from St. Louis to Region of Ontario, book at least 24 days before your planned departure. Booking around this time can save you about 128% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $259 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $473.

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 $359 per person but you can even find prices for as low as $176. The most expensive prices can be found in the month of February. Opting for a March flight can save you 82% on your journey compared to booking in February

What is the cheapest time of day to fly from STL to 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 2,784,634 searches. Data last updated May 30, 2024.
Check out some of the cheapest Delta flights we've come across from St. Louis to Ontario. It's recommended that users confirm their flight details before booking.
Tue 9/36:00 amSTL - YUL
1 stop16h 10mDelta
Sat 9/287:00 amYUL - STL
1 stop11h 55mDelta
Deal found 5/29$483
Mon 9/99:40 amSTL - YUL
1 stop8h 32mDelta
Tue 9/177:00 amYUL - STL
1 stop8h 50mDelta
Deal found 5/29$486
Wed 9/186:00 amSTL - YUL
1 stop8h 17mDelta
Sat 9/217:25 amYUL - STL
1 stop9h 31mDelta
Deal found 5/29$489
Tue 8/1312:59 pmSTL - YUL
1 stop9h 11mDelta
Fri 8/1610:00 amYUL - STL
1 stop9h 40mDelta
Deal found 5/29$491
Tue 7/1612:59 pmSTL - YYZ
1 stop8h 50mDelta
Sat 7/206:30 amYYZ - STL
2 stops11h 09mDelta
Deal found 5/29$497
Mon 9/27:10 pmSTL - YUL
1 stop12h 57mDelta
Sat 9/287:00 amYUL - STL
1 stop11h 55mDelta
Deal found 5/29$498
Fri 7/56:30 amSTL - YYZ
1 stop3h 59mDelta
Wed 7/176:30 amYYZ - STL
1 stop8h 49mDelta
Deal found 5/28$500
Sat 7/136:30 amSTL - YYZ
1 stop3h 59mDelta
Fri 7/1910:16 amYYZ - STL
1 stop9h 14mDelta
Deal found 5/29$515
Thu 6/136:06 amSTL - YYZ
1 stop4h 32mDelta
Sat 6/226:30 amYYZ - STL
1 stop16h 25mDelta
Deal found 5/29$591

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 2,784,634 searches. Data last updated May 30, 2024.
Take a gander at the lowest prices we've found on United Airlines flights from St. Louis to Ontario. Check back soon if you're not seeing flights that suit your needs.
Tue 7/2311:30 amSTL - YUL
Nonstop2h 23mUnited Airlines
Tue 7/235:40 pmYUL - STL
1 stop5h 57mUnited Airlines
Deal found 5/29$539
Sat 9/75:20 pmSTL - YUL
2 stops15h 51mUnited Airlines
Fri 9/135:40 pmYUL - STL
1 stop6h 27mUnited Airlines
Deal found 5/30$542
Thu 7/45:30 pmSTL - YYZ
1 stop15h 28mUnited Airlines
Mon 7/89:00 pmYYZ - STL
1 stop19h 40mUnited Airlines
Deal found 5/29$550
Sat 9/75:20 pmSTL - YUL
2 stops15h 51mUnited Airlines
Fri 9/136:30 pmYUL - STL
2 stops16h 37mUnited Airlines
Deal found 5/29$551
Sat 7/63:43 pmSTL - YYZ
1 stop4h 00mUnited Airlines
Wed 7/107:30 amYYZ - STL
2 stops7h 48mUnited Airlines
Deal found 5/29$567
Tue 10/811:09 amSTL - YYZ
2 stops11h 45mUnited Airlines
Wed 10/167:15 pmYYZ - STL
2 stops15h 52mUnited Airlines
Deal found 5/29$577
Sun 9/2912:00 pmSTL - YUL
Nonstop2h 23mUnited Airlines
Mon 10/77:30 pmYUL - STL
Nonstop2h 35mUnited Airlines
Deal found 5/28$612
Tue 7/1610:10 amSTL - YYZ
Nonstop1h 59mUnited Airlines
Sat 7/206:55 pmYYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 5/30$650
Fri 10/44:05 pmSTL - YYZ
Nonstop1h 54mUnited Airlines
Mon 10/79:00 pmYYZ - STL
1 stop14h 07mUnited Airlines
Deal found 5/28$656

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 2,784,634 searches. Prices were last updated on May 30, 2024.
These are some of the most attractive deals on flights from St. Louis to Ontario in 2024. Check back regularly for other flight deals.
Sun 6/97:44 pmSTL - YYZ
1 stop26h 18mMultiple Airlines
Tue 6/116:30 amYYZ - STL
1 stop8h 53mMultiple Airlines
Deal found 5/29$286
Tue 6/117:29 pmSTL - YYZ
1 stop10h 06mMultiple Airlines
Tue 6/186:30 amYYZ - STL
1 stop8h 53mMultiple Airlines
Deal found 5/29$292
Mon 6/107:29 pmSTL - YYZ
1 stop26h 18mMultiple Airlines
Tue 6/186:30 amYYZ - STL
1 stop8h 53mMultiple Airlines
Deal found 5/29$295
Mon 6/107:29 pmSTL - YYZ
1 stop26h 18mMultiple Airlines
Sat 6/226:30 amYYZ - STL
1 stop11h 58mMultiple Airlines
Deal found 5/29$303
Mon 6/177:29 pmSTL - YYZ
1 stop10h 16mMultiple Airlines
Sat 6/226:30 amYYZ - STL
1 stop11h 58mMultiple Airlines
Deal found 5/29$310
Tue 6/113:23 pmSTL - YYZ
1 stop29h 02mMultiple Airlines
Sat 6/227:55 amYYZ - STL
1 stop10h 33mMultiple Airlines
Deal found 5/29$318
Wed 6/127:29 pmSTL - YYZ
1 stop10h 13mMultiple Airlines
Tue 6/186:30 amYYZ - STL
1 stop8h 53mMultiple Airlines
Deal found 5/29$324
Tue 6/117:45 amSTL - YYZ
2 stops10h 50mMultiple Airlines
Fri 6/218:15 pmYYZ - STL
1 stop15h 19mMultiple Airlines
Deal found 5/29$331
Tue 6/117:45 amSTL - YYZ
2 stops10h 50mMultiple Airlines
Tue 6/186:30 amYYZ - STL
1 stop8h 53mMultiple Airlines
Deal found 5/29$335

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 2,784,634 searches. Data last updated May 30, 2024.
These are some of the most attractive deals on flights from St. Louis to Ontario in 2024. Check back regularly for other flight deals.
Sun 6/97:44 pmSTL - YYZ
1 stop26h 18mMultiple Airlines
Tue 6/116:30 amYYZ - STL
1 stop8h 53mMultiple Airlines
Deal found 5/29$286
Tue 6/117:29 pmSTL - YYZ
1 stop10h 06mMultiple Airlines
Tue 6/186:30 amYYZ - STL
1 stop8h 53mMultiple Airlines
Deal found 5/29$292
Mon 6/107:29 pmSTL - YYZ
1 stop26h 18mMultiple Airlines
Tue 6/186:30 amYYZ - STL
1 stop8h 53mMultiple Airlines
Deal found 5/29$295
Mon 6/107:29 pmSTL - YYZ
1 stop26h 18mMultiple Airlines
Sat 6/226:30 amYYZ - STL
1 stop11h 58mMultiple Airlines
Deal found 5/29$303
Mon 6/177:29 pmSTL - YYZ
1 stop10h 16mMultiple Airlines
Sat 6/226:30 amYYZ - STL
1 stop11h 58mMultiple Airlines
Deal found 5/29$310
Tue 6/113:23 pmSTL - YYZ
1 stop29h 02mMultiple Airlines
Sat 6/227:55 amYYZ - STL
1 stop10h 33mMultiple Airlines
Deal found 5/29$318
Wed 6/127:29 pmSTL - YYZ
1 stop10h 13mMultiple Airlines
Tue 6/186:30 amYYZ - STL
1 stop8h 53mMultiple Airlines
Deal found 5/29$324
Tue 6/117:45 amSTL - YYZ
2 stops10h 50mMultiple Airlines
Fri 6/218:15 pmYYZ - STL
1 stop15h 19mMultiple Airlines
Deal found 5/29$331
Tue 9/108:00 amSTL - YYZ
1 stop14h 45mMultiple Airlines
Fri 9/138:15 pmYYZ - STL
1 stop15h 13mMultiple Airlines
Deal found 5/29$334

Non-stop 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 2,784,634 searches. Data last updated May 30, 2024.
If you're seeking options on non-stop flights from St. Louis to Ontario, check out these fares. 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.
Sat 9/712:00 pmSTL - YUL
Nonstop2h 23mAir Canada
Sat 9/287:30 pmYUL - STL
Nonstop2h 35mAir Canada
Deal found 5/29$512
Sun 7/710:10 amSTL - YYZ
Nonstop1h 59mAir Canada
Thu 7/182:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Deal found 5/28$533
Mon 9/912:00 pmSTL - YUL
Nonstop2h 23mAir Canada
Tue 9/177:30 pmYUL - STL
Nonstop2h 35mAir Canada
Deal found 5/29$557
Thu 8/110:10 amSTL - YYZ
Nonstop1h 59mAir Canada
Mon 8/52:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Deal found 5/29$574
Sun 10/1312:00 pmSTL - YUL
Nonstop2h 23mAir Canada
Sat 10/197:30 pmYUL - STL
Nonstop2h 35mAir Canada
Deal found 5/29$582
Mon 7/810:10 amSTL - YYZ
Nonstop1h 59mUnited Airlines
Fri 7/122:15 pmYYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 5/28$586
Sun 9/2912:00 pmSTL - YUL
Nonstop2h 23mUnited Airlines
Mon 10/77:30 pmYUL - STL
Nonstop2h 35mUnited Airlines
Deal found 5/28$612
Thu 9/124:05 pmSTL - YYZ
Nonstop1h 54mMultiple Airlines
Sun 9/152:15 pmYYZ - STL
Nonstop2h 05mMultiple Airlines
Deal found 5/28$628
Thu 7/114:05 pmSTL - YYZ
Nonstop1h 59mUnited Airlines
Mon 7/156:55 pmYYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 5/28$629

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 2,784,634 searches. Data last updated May 30, 2024.
Book one of these great deals on flights from St. Louis to Ontario. Users should double check the flight they book to ensure it matches the day, time, and destination they're looking for.
Sun 6/97:44 pmSTL - YYZ
1 stop26h 18mMultiple Airlines
Tue 6/116:30 amYYZ - STL
1 stop8h 53mMultiple Airlines
Deal found 5/29$286
Thu 6/67:44 pmSTL - YYZ
1 stop27h 38mMultiple Airlines
Mon 6/1010:35 amYYZ - STL
1 stop7h 39mMultiple Airlines
Deal found 5/29$350
Fri 6/77:44 pmSTL - YYZ
1 stop17h 44mMultiple Airlines
Sun 6/166:30 amYYZ - STL
1 stop11h 02mMultiple Airlines
Deal found 5/29$360
Fri 6/77:44 pmSTL - YYZ
1 stop17h 44mMultiple Airlines
Sun 6/98:20 pmYYZ - STL
2 stops26h 39mMultiple Airlines
Deal found 5/29$368
Fri 6/77:44 pmSTL - YYZ
1 stop17h 44mMultiple Airlines
Sun 6/162:40 pmYYZ - STL
2 stops26h 25mMultiple Airlines
Deal found 5/29$374
Fri 6/77:44 pmSTL - YYZ
1 stop17h 44mMultiple Airlines
Sun 6/98:20 pmYYZ - STL
1 stop18h 31mMultiple Airlines
Deal found 5/29$380
Fri 6/77:44 pmSTL - YYZ
1 stop17h 44mMultiple Airlines
Mon 6/1010:35 amYYZ - STL
1 stop7h 39mMultiple Airlines
Deal found 5/29$381
Fri 6/77:44 pmSTL - YYZ
1 stop17h 44mMultiple Airlines
Mon 6/1010:35 amYYZ - STL
1 stop7h 39mMultiple Airlines
Deal found 5/29$383
Fri 6/710:36 pmSTL - YYZ
2 stops30h 59mMultiple Airlines
Mon 6/1010:35 amYYZ - STL
1 stop7h 39mMultiple Airlines
Deal found 5/29$394

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 2,784,634 searches. Data last updated May 30, 2024.
Users traveling one-way from St. Louis to Ontario can select one of these great deals. Users in need of a round-trip flight from St. Louis to Ontario instead should update the search form at the top of page.
Mon 6/107:29 pmSTL - YYZ
1 stop26h 18mMultiple Airlines
Deal found 5/29$113
Thu 6/277:44 pmSTL - YYZ
1 stop26h 42mMultiple Airlines
Deal found 5/29$127
Sun 6/237:29 pmSTL - YYZ
1 stop26h 16mMultiple Airlines
Deal found 5/29$131
Sun 6/237:44 pmSTL - YYZ
1 stop26h 42mMultiple Airlines
Deal found 5/29$136
Thu 6/67:44 pmSTL - YYZ
1 stop26h 42mMultiple Airlines
Deal found 5/28$138
Thu 7/46:22 pmSTL - YYZ
1 stop26h 03mMultiple Airlines
Deal found 5/29$141
Sun 6/97:44 pmSTL - YYZ
1 stop26h 42mMultiple Airlines
Deal found 5/29$147
Wed 6/58:13 amSTL - YYZ
1 stop14h 13mMultiple Airlines
Deal found 5/29$148
Tue 8/2710:34 amSTL - YYZ
1 stop9h 41mMultiple Airlines
Deal found 5/28$164

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

Fly from

Any airport

Fly to

Any airport

Budget

$286 - $623

Route

Depart

Return

Price

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 6/9

1 stop26h 18m

Toronto Pearson Intl

Tue 6/11

1 stop8h 53m

$286

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 6/11

1 stop10h 06m

Toronto Pearson Intl

Tue 6/18

1 stop8h 53m

$292

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 6/10

1 stop26h 18m

Toronto Pearson Intl

Tue 6/18

1 stop8h 53m

$295

Lambert-St LouisToronto Pearson Intl

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 6/10

1 stop26h 18m

Toronto Pearson Intl

Sat 6/22

1 stop11h 58m

$303

Lambert-St LouisMontreal Pierre Elliott Trudeau Intl

STL - YUL

STLYUL

Lambert-St Louis

Tue 9/3

1 stop16h 10m

Montreal Pierre Elliott Trudeau Intl

Sat 9/28

1 stop11h 55m

$483

Lambert-St LouisMontreal Pierre Elliott Trudeau Intl

STL - YUL

STLYUL

Lambert-St Louis

Sat 9/7

Nonstop2h 23m

Montreal Pierre Elliott Trudeau Intl

Sat 9/28

Nonstop2h 35m

$512

Lambert-St LouisMontreal Pierre Elliott Trudeau Intl

STL - YUL

STLYUL

Lambert-St Louis

Fri 6/21

1 stop16h 47m

Montreal Pierre Elliott Trudeau Intl

Thu 6/27

1 stop10h 30m

$530

Lambert-St LouisMontreal Pierre Elliott Trudeau Intl

STL - YUL

STLYUL

Lambert-St Louis

Tue 7/23

Nonstop2h 23m

Montreal Pierre Elliott Trudeau Intl

Tue 7/23

1 stop5h 57m

$539

Lambert-St LouisMontreal Pierre Elliott Trudeau Intl

STL - YUL

STLYUL

Lambert-St Louis

Thu 7/4

1 stop6h 20m

Montreal Pierre Elliott Trudeau Intl

Sun 7/7

1 stop4h 08m

$623

Flights are sorted by cheapest first

Deals found on 5/29

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

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

Have a flexible travel schedule? Discover the best time to fly to Ontario from St. Louis 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 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 May 30, 2024.
Peruse reviews from past customers who have flown with Delta, United Airlines and Air Canada from St. Louis to Ontario to help guide your decision. In addition to providing an overall rating, users have also rated airlines 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

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
10,457 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

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.

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

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
2,866 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

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
10,777 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

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
14,284 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

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?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Ontario. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

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

    Yes, there are multiple flights from St. Louis to Region of Ontario for under $300. The cheapest flight booked recently is on Multiple Airlines for just $286, but on average you can expect to pay $342.

  • Are there nonstop flights from St. Louis to Region of Ontario for under $600 on Cheapflights?

    Cheapflights has at least 20 direct flights from St. Louis to Region of Ontario under $600. A good price for a nonstop flight from St. Louis to Region of Ontario is less than $653.

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

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

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

    When deciding which route to take from St. Louis to Region of Ontario consider Lambert-St Louis - Toronto Pearson Intl, Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl or Lambert-St Louis - Ottawa as they are the most popular.

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

    No one likes to see their flight delayed. When booking a flight from St. Louis to Region of Ontario consider choosing United Airlines (84%), Air Canada (82%) or Jazz (82%) as they are the most reliable in getting you off to your destination on time.

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

    Looking for the cheapest flight from St. Louis to Region of Ontario? While on average our users pay $1,838, our data indicates the cheapest price to be $242. The most popular route (Lambert-St Louis - Toronto Pearson Intl), is priced around $286.

  • 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! This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Ottawa Airport (YOW), Hamilton Airport (YHM), Toronto Island Airport (YTZ), Toronto Kitchener-Waterloo Airport (YKF), London Airport (YXU).

  • 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 5/29.

  • What are the most popular airlines that fly from St. Louis to Region of Ontario?

    American Airlines, Air Canada and United Airlines are the most popular airlines when flying from St. Louis to Region of Ontario.

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

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Region of Ontario (average of $237). Flying from St. Louis to Region of Ontario in July is currently the most expensive (average of $391). 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.

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.

Kansas City to Vancouver Intl flights
St. Louis to Pearson Intl flights
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Top 3 airlines flying from St. Louis to Ontario

Discover the top 3 airlines 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 2,784,634 searches. Data last updated May 30, 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$188Average$446FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$225Average$680FlexibilityNo cancel feeOn-time69%
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American AirlinesCheapest$299Average$551FlexibilityNo cancel feeOn-time71%
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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 May 30, 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

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 makes it easy to find St. Louis to Ontario flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Millions of users choose and trust Cheapflights to book the best flight deals from St. Louis to Ontario for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Need flexible booking options for your flight to Ontario from St. Louis? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Ontario from St. Louis today and book when prices fit your budget.

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