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Cheap flights from Ontario to St. Louis from $159

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to St. Louis departing on 11/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ontario to St. Louis

Cheap round-trip flights

These are some of the best round-trip flight deals from Ontario to St. Louis that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Ontario to St. Louis.

Cheap last minute flights

Planning a quick getaway from Ontario to St. Louis? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to St. Louis, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Ontario to St. Louis

Find recent round-trip train or bus tickets from Ontario to St. Louis.

All round-trip flight deals to St. Louis

The cheapest plane tickets to St. Louis found on KAYAK recently.
8:00 pm - 3:21 pmYYZ-STL
20h 21m2 stops
12:15 pm - 11:45 amSTL-YYZ
22h 30m3 stops
Wed, Dec 11 - Wed, Dec 18
1:14 pm - 10:05 pmYYZ-STL
9h 51m1 stop
11:00 am - 9:20 pmSTL-YYZ
9h 20m1 stop
$420American Airlines
Find Deal
Wed, Dec 11 - Wed, Dec 18
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
11:20 am - 4:46 pmSTL-YYZ
4h 26m1 stop
$433Air Canada
Find Deal
Wed, Dec 11 - Wed, Dec 18
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$434Air Canada
Find Deal
Thu, Dec 5 - Sun, Dec 8
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$476United Airlines
Find Deal
Thu, Dec 5 - Sun, Dec 8
6:15 am - 12:04 pmYYZ-STL
6h 49m1 stop
6:30 am - 11:27 amSTL-YYZ
3h 57m1 stop
$481Delta
Find Deal
Thu, Dec 5 - Sun, Dec 8
6:15 pm - 11:41 pmYYZ-STL
6h 26m1 stop
6:30 am - 11:27 amSTL-YYZ
3h 57m1 stop
$482Delta
Find Deal
Thu, Dec 5 - Sun, Dec 8
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$483United Airlines
Find Deal
Thu, Dec 5 - Mon, Dec 9
6:30 pm - 6:21 pmYYZ-STL
24h 51m2 stops
5:17 pm - 11:07 amSTL-YYZ
16h 50m1 stop
$584WestJet
Find Deal
Sun, Dec 15 - Sun, Dec 22
6:45 am - 12:05 pmYUL-STL
30h 20m2 stops
11:46 am - 12:30 pmSTL-YUL
23h 44m2 stops
$616WestJet
Find Deal
Mon, Dec 16 - Wed, Dec 25
5:35 pm - 7:41 amYYZ-STL
15h 06m1 stop
Tue, Nov 19
8:00 pm - 7:41 amYYZ-STL
12h 41m1 stop
Thu, Nov 21
7:30 am - 7:41 amYYZ-STL
25h 11m1 stop
Fri, Nov 22
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
$258Air Canada
Find Deal
Thu, Dec 12
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
$266Air Canada
Find Deal
Sun, Dec 15
7:15 am - 3:34 pmYYZ-STL
9h 19m2 stops
$305United Airlines
Find Deal
Tue, Dec 3
6:30 am - 3:39 pmYYZ-STL
10h 09m2 stops
$335United Airlines
Find Deal
Tue, Nov 26
6:45 am - 9:55 pmYUL-STL
40h 10m2 stops
$381WestJet
Find Deal
Sun, Dec 1
6:30 am - 10:06 pmYYZ-STL
16h 36m1 stop
$403WestJet
Find Deal
Sun, Dec 22
7:14 am - 7:30 pmYUL-STL
13h 16m1 stop
$456American Airlines
Find Deal
Sun, Dec 1
11:15 am - 4:34 pmYYZ-STL
30h 19m1 stop
7:41 pm - 9:47 pmSTL-YYZ
25h 06m2 stops
Mon, Nov 18 - Mon, Nov 25
7:05 am - 4:34 pmYYZ-STL
10h 29m1 stop
5:29 pm - 9:32 pmSTL-YYZ
27h 03m1 stop
Sun, Nov 17 - Tue, Nov 19
6:30 am - 11:58 amYYZ-STL
6h 28m1 stop
6:00 am - 4:11 pmSTL-YYZ
9h 11m1 stop
$735Delta
Find Deal
Mon, Nov 18 - Mon, Nov 25
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
6:30 am - 1:42 pmSTL-YYZ
6h 12m1 stop
$903Air Canada
Find Deal
Fri, Nov 15 - Sat, Nov 30
9:00 am - 2:25 pmYYZ-STL
6h 25m1 stop
8:05 am - 1:42 pmSTL-YYZ
4h 37m1 stop
$909Air Canada
Find Deal
Fri, Nov 15 - Sat, Nov 30
10:00 am - 9:55 pmYYZ-STL
12h 55m2 stops
6:00 am - 11:11 pmSTL-YYZ
16h 11m2 stops
$948WestJet
Find Deal
Fri, Nov 15 - Sat, Nov 30
6:30 am - 9:55 pmYYZ-STL
16h 25m2 stops
10:21 am - 11:34 pmSTL-YYZ
12h 13m2 stops
$1,074WestJet
Find Deal
Mon, Nov 18 - Mon, Nov 25
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$1,134United Airlines
Find Deal
Mon, Nov 18 - Mon, Nov 25
6:00 am - 2:40 pmYYZ-STL
9h 40m2 stops
6:30 am - 5:55 pmSTL-YYZ
10h 25m2 stops
$1,334Delta
Find Deal
Sat, Nov 16 - Tue, Nov 19
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$1,372United Airlines
Find Deal
Sat, Nov 16 - Tue, Nov 19
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$434Air Canada
Find Deal
Thu, Dec 5 - Sun, Dec 8
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$446Air Canada
Find Deal
Tue, Jan 7 - Tue, Jan 21
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$465Air Canada
Find Deal
Wed, Dec 11 - Wed, Dec 18
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$466Air Canada
Find Deal
Wed, Dec 11 - Wed, Dec 18
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$468Air Canada
Find Deal
Thu, Dec 5 - Mon, Dec 9
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$476United Airlines
Find Deal
Thu, Dec 5 - Sun, Dec 8
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$483United Airlines
Find Deal
Thu, Dec 5 - Mon, Dec 9
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$504Air Canada
Find Deal
Wed, Dec 11 - Tue, Dec 17
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$613United Airlines
Find Deal
Tue, Dec 24 - Sun, Dec 29
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
Fri, Apr 18 - Sun, Apr 20

Delta flights from Region of Ontario to St. Louis

Our best Delta deals on Region of Ontario to St. Louis flight tickets
Delta
Dec 5
YYZ6:15 amToronto Pearson Intl
6h 49m
1 stop
STL12:04 pmLambert-St Louis
Dec 8
STL6:30 amLambert-St Louis
3h 57m
1 stop
YYZ11:27 amToronto Pearson Intl
Delta
Dec 5
YYZ6:15 pmToronto Pearson Intl
6h 26m
1 stop
STL11:41 pmLambert-St Louis
Dec 8
STL6:30 amLambert-St Louis
3h 57m
1 stop
YYZ11:27 amToronto Pearson Intl
Delta
Jan 16
YUL11:20 amMontreal Pierre Elliott Trudeau Intl
10h 46m
1 stop
STL9:06 pmLambert-St Louis
Jan 19
STL10:20 amLambert-St Louis
9h 46m
1 stop
YUL9:06 pmMontreal Pierre Elliott Trudeau Intl

WestJet flights from Region of Ontario to St. Louis

Our best WestJet deals on Region of Ontario to St. Louis flight tickets
WestJet
Dec 15
YYZ6:30 pmToronto Pearson Intl
24h 51m
2 stops
STL6:21 pmLambert-St Louis
Dec 22
STL5:17 pmLambert-St Louis
16h 50m
1 stop
YYZ11:07 amToronto Pearson Intl
WestJet
Dec 16
YUL6:45 amMontreal Pierre Elliott Trudeau Intl
30h 20m
2 stops
STL12:05 pmLambert-St Louis
Dec 25
STL11:46 amLambert-St Louis
23h 44m
2 stops
YUL12:30 pmMontreal Pierre Elliott Trudeau Intl
WestJet
Dec 16
YUL6:45 amMontreal Pierre Elliott Trudeau Intl
30h 20m
2 stops
STL12:05 pmLambert-St Louis
Dec 26
STL6:04 amLambert-St Louis
16h 39m
1 stop
YUL11:43 pmMontreal Pierre Elliott Trudeau Intl

How to get the cheapest flight ticket from Region of Ontario to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies to St. Louis from Region of Ontario?

Air Canada. Air Canada and United Airlines are the most popular carriers operating from Region of Ontario to St. Louis

What is the cheapest Region of Ontario to St. Louis flight route?

Toronto Pearson Intl - Lambert-St Louis. Fly from Toronto Pearson Intl to Lambert-St Louis for the best Region of Ontario - St. Louis flight prices

Can stopping save me money on Region of Ontario to St. Louis flights?

You could potentially save up to 40% on your flight if you consider stops on a Region of Ontario to St. Louis flight.

Cheap Region of Ontario to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to St. Louis

Best Price Found

$159

Fastest flight time

2h 16m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Region of Ontario in the past 72 hours is $159. The best round-trip flight deal from Region of Ontario to St. Louis found on momondo in the last 72 hours is $415.
The fastest flight from Region of Ontario to St. Louis takes 2h 16m
Direct flights go from Region of Ontario to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)

  • When did momondo last update prices for flights from Ontario to Lambert-St Louis Airport?

    Prices for flights from Ontario to Lambert-St Louis Airport refresh daily.

  • How many operators does momondo search for flights from Ontario to Lambert-St Louis Airport?

  • How old do you have to be to fly from Ontario to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Region of Ontario to St. Louis?


Best airlines flying from Region of Ontario to St. Louis

Compare and see reviews for airlines that fly from Region of Ontario to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $264Free CancellationRating
7.0
8,198 reviews
Search Air Canada flights
United AirlinesPriceFrom $575Free CancellationRating
7.4
9,194 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to St. Louis?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ontario to St. Louis with flexible booking policies on momondo?

Flights from Ontario to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to St. Louis?

Once all potential Ontario to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to St. Louis right now. Can momondo alert me if prices change?

Price alerts on flights to St. Louis from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


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