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Cheap flights from St. Louis to Ontario from $119

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Ontario departing on 12/11. 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 St. Louis to Ontario

Cheap round-trip flights

These are some of the best round-trip flight deals from St. Louis to Ontario 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 St. Louis to Ontario.

Cheap last minute flights

Planning a quick getaway from St. Louis to Ontario? 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 Ontario, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from St. Louis to Ontario

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

All round-trip flight deals to Ontario

The cheapest plane tickets to Ontario found on KAYAK recently.
3:34 pm - 9:54 amSTL-YYZ
17h 20m2 stops
11:15 am - 3:21 pmYYZ-STL
29h 06m1 stop
Fri, Dec 6 - Mon, Dec 9
4:27 pm - 10:35 pmSTL-YYZ
29h 08m1 stop
7:05 am - 3:21 pmYYZ-STL
9h 16m1 stop
Tue, Dec 24 - Tue, Dec 31
10:20 am - 8:31 pmSTL-YYZ
9h 11m1 stop
10:35 pm - 4:45 pmYYZ-STL
19h 10m2 stops
$449WestJet
Find Deal
Wed, Feb 5 - Wed, Feb 5
5:45 am - 5:35 pmSTL-YYZ
10h 50m1 stop
6:15 am - 3:40 pmYYZ-STL
10h 25m1 stop
$461American Airlines
Find Deal
Wed, Dec 18 - Wed, Dec 25
12:00 pm - 9:20 pmSTL-YYZ
8h 20m1 stop
6:15 am - 2:07 pmYYZ-STL
8h 52m1 stop
$471American Airlines
Find Deal
Wed, Jan 8 - Wed, Jan 22
8:05 am - 10:15 pmSTL-YYZ
13h 10m2 stops
8:00 am - 3:47 pmYYZ-STL
8h 47m1 stop
$557United Airlines
Find Deal
Wed, Dec 18 - Wed, Dec 25
6:30 am - 11:59 pmSTL-YYZ
16h 29m1 stop
11:00 am - 10:27 amYYZ-STL
24h 27m1 stop
$562United Airlines
Find Deal
Sat, Dec 14 - Mon, Dec 16
1:35 pm - 11:42 pmSTL-YYZ
9h 07m1 stop
6:15 am - 4:53 pmYYZ-STL
11h 38m2 stops
$580Delta
Find Deal
Wed, Jan 8 - Sat, Jan 11
6:05 am - 4:11 pmSTL-YYZ
9h 06m1 stop
10:05 am - 8:56 pmYYZ-STL
11h 51m2 stops
$588Delta
Find Deal
Mon, Jan 13 - Thu, Jan 16
6:00 am - 11:11 pmSTL-YYZ
16h 11m2 stops
6:15 am - 11:41 pmYYZ-STL
18h 26m1 stop
$684WestJet
Find Deal
Sat, Nov 30 - Sun, Dec 1
5:02 pm - 9:54 amSTL-YYZ
15h 52m1 stop
Wed, Dec 11
6:41 pm - 12:25 amSTL-YYZ
28h 44m1 stop
Thu, Nov 28
4:26 pm - 11:55 pmSTL-YYZ
30h 29m1 stop
Thu, Dec 5
7:00 am - 2:55 pmSTL-YYZ
30h 55m1 stop
$212Alaska Airlines
Find Deal
Tue, Dec 10
7:00 am - 2:55 pmSTL-YYZ
30h 55m1 stop
$221Alaska Airlines
Find Deal
Mon, Dec 9
5:45 am - 5:40 pmSTL-YYZ
10h 55m1 stop
$252American Airlines
Find Deal
Wed, Jan 1
5:45 am - 3:00 pmSTL-YYZ
8h 15m2 stops
$273American Airlines
Find Deal
Wed, Dec 11
11:20 am - 10:15 pmSTL-YYZ
9h 55m2 stops
$289United Airlines
Find Deal
Thu, Dec 12
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
$322United Airlines
Find Deal
Mon, Dec 9
2:18 pm - 11:08 pmSTL-YUL
7h 50m1 stop
$347Delta
Find Deal
Tue, Apr 29
5:21 pm - 9:32 pmSTL-YYZ
27h 11m1 stop
7:05 am - 4:26 pmYYZ-STL
10h 21m1 stop
Thu, Nov 21 - Sat, Nov 23
10:17 pm - 11:35 pmSTL-YYZ
24h 18m2 stops
8:00 pm - 5:41 pmYYZ-STL
22h 41m1 stop
Sun, Nov 24 - Wed, Nov 27
4:10 pm - 12:42 amSTL-YYZ
31h 32m3 stops
2:00 pm - 4:26 pmYYZ-STL
27h 26m3 stops
Wed, Nov 20 - Fri, Nov 22
5:34 pm - 11:59 pmSTL-YYZ
5h 25m1 stop
10:00 am - 10:40 amYYZ-STL
25h 40m2 stops
$794WestJet
Find Deal
Sun, Nov 24 - Mon, Nov 25
12:59 pm - 7:00 pmSTL-YYZ
5h 01m1 stop
10:55 am - 7:48 pmYYZ-STL
9h 53m1 stop
$933American Airlines
Find Deal
Sun, Nov 24 - Mon, Nov 25
1:05 pm - 10:18 pmSTL-YYZ
8h 13m2 stops
6:35 pm - 3:39 pmYYZ-STL
22h 04m1 stop
$1,055United Airlines
Find Deal
Sat, Nov 23 - Sun, Nov 24
12:00 pm - 8:18 pmSTL-YYZ
7h 18m1 stop
9:00 pm - 10:27 amYYZ-STL
14h 27m1 stop
$1,111United Airlines
Find Deal
Sat, Nov 23 - Sun, Nov 24
10:21 am - 11:34 pmSTL-YYZ
12h 13m2 stops
10:00 am - 10:40 amYYZ-STL
25h 40m2 stops
$1,524WestJet
Find Deal
Fri, Nov 22 - Sun, Nov 24
1:09 pm - 7:06 pmSTL-YYZ
4h 57m1 stop
6:15 pm - 11:41 pmYYZ-STL
6h 26m1 stop
$1,645Delta
Find Deal
Thu, Nov 21 - Sun, Nov 24
7:15 am - 5:00 pmSTL-YYZ
8h 45m1 stop
6:00 am - 2:40 pmYYZ-STL
9h 40m2 stops
$1,903Delta
Find Deal
Fri, Nov 22 - Sun, Nov 24
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
$527Air Canada
Find Deal
Wed, Jan 8 - Wed, Jan 22
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
Tue, Dec 24 - Tue, Dec 31
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
Thu, Jan 16 - Tue, Jan 21
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
Wed, Dec 18 - Wed, Dec 25
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
$692United Airlines
Find Deal
Thu, Jan 2 - Thu, Jan 9
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
$777Air Canada
Find Deal
Mon, Dec 23 - Fri, Dec 27
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
$793United Airlines
Find Deal
Sat, Dec 14 - Mon, Dec 16
1:25 pm - 5:00 pmSTL-YUL
2h 35mnonstop
6:10 pm - 7:58 pmYUL-STL
2h 48mnonstop
$809Air Canada
Find Deal
Tue, May 13 - Tue, May 27
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
$810United Airlines
Find Deal
Sun, Mar 16 - Sun, Mar 23
3:50 pm - 6:45 pmSTL-YYZ
1h 55mnonstop
1:50 pm - 3:06 pmYYZ-STL
2h 16mnonstop
$846United Airlines
Find Deal
Fri, Dec 20 - Fri, Dec 27

WestJet flights from St. Louis to Region of Ontario

Our best WestJet deals on St. Louis to Region of Ontario flight tickets
WestJet
Feb 5
STL10:20 amLambert-St Louis
9h 11m
1 stop
YYZ8:31 pmToronto Pearson Intl
Feb 5
YYZ10:35 pmToronto Pearson Intl
19h 10m
2 stops
STL4:45 pmLambert-St Louis
WestJet
Nov 30
STL6:00 amLambert-St Louis
16h 11m
2 stops
YYZ11:11 pmToronto Pearson Intl
Dec 1
YYZ6:15 amToronto Pearson Intl
18h 26m
1 stop
STL11:41 pmLambert-St Louis
WestJet
Dec 13
STL6:00 amLambert-St Louis
16h 34m
2 stops
YYZ11:34 pmToronto Pearson Intl
Dec 15
YYZ6:30 amToronto Pearson Intl
5h 10m
1 stop
STL10:40 amLambert-St Louis

Air Canada flights from St. Louis to Region of Ontario

Our best Air Canada deals on St. Louis to Region of Ontario flight tickets
Air Canada
Jan 8
STL2:55 pmLambert-St Louis
5h 30m
1 stop
YYZ9:25 pmToronto Pearson Intl
Jan 22
YYZ1:50 pmToronto Pearson Intl
2h 16m
STL3:06 pmLambert-St Louis
Air Canada
Dec 24
STL5:00 amLambert-St Louis
6h 31m
1 stop
YYZ12:31 pmToronto Pearson Intl
Dec 31
YYZ1:50 pmToronto Pearson Intl
2h 16m
STL3:06 pmLambert-St Louis
Air Canada
Jan 8
STL8:00 amLambert-St Louis
6h 45m
1 stop
YYZ3:45 pmToronto Pearson Intl
Jan 11
YYZ1:50 pmToronto Pearson Intl
2h 16m
STL3:06 pmLambert-St Louis

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

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 Region of Ontario from St. Louis?

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

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

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

How many flights depart from St. Louis to Region of Ontario on average per day?

1 flights are operational weekly from St. Louis to Region of Ontario as of November 2024. The most popular departure time for this route is 3:00PM, with 100% of flights per day taking off in the afternoon.

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

You could potentially save up to 54% on your flight if you consider stops on a St. Louis to Region of Ontario flight.

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

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

Best Price Found

$119

Fastest flight time

1h 55m

Direct flights

Every day

Airports in Region of Ontario

3 airports
The best one-way flight to Region of Ontario from St. Louis in the past 72 hours is $119. The best round-trip flight deal from St. Louis to Region of Ontario found on momondo in the last 72 hours is $344.
The fastest flight from St. Louis to Region of Ontario takes 1h 55m
Direct flights go from St. Louis to Region of Ontario every day.
There are 3 airports near Region of Ontario: Ottawa (YOW), Montreal Pierre Elliott Trudeau Intl (YUL), Toronto Pearson Intl (YYZ)

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

    Prices for flights from Lambert-St Louis Airport to Ontario were last updated today.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Ontario.

  • What documentation or ID do you need to fly to Ontario?

    The required travel and health documents for your Ontario trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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


Best airlines flying from St. Louis to Region of Ontario

Compare and see reviews for airlines that fly from St. Louis to Region of Ontario with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $197Free CancellationRating
7.0
8,235 reviews
Search Air Canada flights
United AirlinesPriceFrom $225Free CancellationRating
7.4
9,173 reviews
Search United Airlines flights
American AirlinesPriceFrom $304Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

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

It is quick and easy to find St. Louis to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

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

Yes. All flights to Ontario from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search for St. Louis to Ontario flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are simply researching potential flights to Ontario, momondo offers a useful price alert feature which will track prices for flights to Ontario from St. Louis and alert you when they change.


An easier way to manage your Region of Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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