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Cheap flights from St. Louis to Ontario from C$ 115

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 11/2. 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.
5:05 p.m. - 9:54 a.m.STL-YYZ
15h 49m1 stop
7:10 a.m. - 11:31 p.m.YYZ-STL
17h 21m2 stops
C$ 376
Find Deal
Wed, 8 Jan - Wed, 22 Jan
5:20 p.m. - 11:44 p.m.STL-YYZ
29h 24m1 stop
7:25 p.m. - 5:43 p.m.YYZ-STL
23h 18m1 stop
C$ 421
Find Deal
Sun, 2 Mar - Tue, 4 Mar
8:50 a.m. - 7:10 p.m.STL-YUL
9h 20m1 stop
5:15 p.m. - 8:58 a.m.YUL-STL
16h 43m1 stop
C$ 660Delta
Find Deal
Sat, 25 Jan - Mon, 27 Jan
6:06 a.m. - 4:08 p.m.STL-YYZ
9h 02m1 stop
7:55 a.m. - 4:49 p.m.YYZ-STL
9h 54m1 stop
C$ 683Delta
Find Deal
Mon, 3 Feb - Mon, 10 Feb
8:50 a.m. - 9:17 p.m.STL-YYZ
11h 27m1 stop
9:10 p.m. - 7:31 p.m.YYZ-STL
23h 21m2 stops
C$ 710Frontier
Find Deal
Sat, 25 Jan - Sat, 1 Feb
5:50 p.m. - 9:44 a.m.STL-YYZ
14h 54m2 stops
9:10 p.m. - 7:31 p.m.YYZ-STL
23h 21m2 stops
C$ 719Frontier
Find Deal
Sat, 25 Jan - Sat, 1 Feb
8:05 a.m. - 1:42 p.m.STL-YYZ
4h 37m1 stop
1:50 p.m. - 3:06 p.m.YYZ-STL
2h 16mdirect
C$ 790Air Canada
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Sun, 2 Mar - Tue, 4 Mar
11:30 a.m. - 4:46 p.m.STL-YYZ
4h 16m1 stop
1:50 p.m. - 3:06 p.m.YYZ-STL
2h 16mdirect
C$ 814Air Canada
Find Deal
Sat, 25 Jan - Sat, 1 Feb
9:44 a.m. - 1:42 p.m.STL-YYZ
26h 58m1 stop
7:20 a.m. - 8:02 p.m.YYZ-STL
13h 42m2 stops
C$ 843United Airlines
Find Deal
Thu, 16 Jan - Wed, 22 Jan
9:44 a.m. - 10:15 p.m.STL-YYZ
11h 31m2 stops
6:52 a.m. - 3:38 p.m.YYZ-STL
9h 46m1 stop
C$ 873United Airlines
Find Deal
Mon, 13 Jan - Wed, 15 Jan
5:05 p.m. - 1:55 p.m.STL-YYZ
19h 50m1 stop
C$ 115
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Tue, 11 Feb
5:05 p.m. - 1:55 p.m.STL-YYZ
19h 50m1 stop
C$ 120
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Wed, 15 Jan
5:05 p.m. - 1:55 p.m.STL-YYZ
19h 50m1 stop
C$ 138
Find Deal
Wed, 8 Jan
6:30 a.m. - 1:42 p.m.STL-YYZ
6h 12m1 stop
C$ 337Air Canada
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Thu, 16 Jan
3:50 p.m. - 6:45 p.m.STL-YYZ
1h 55mdirect
C$ 393Air Canada
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Sat, 11 Jan
3:50 p.m. - 6:45 p.m.STL-YYZ
1h 55mdirect
C$ 409United Airlines
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Tue, 11 Feb
7:05 a.m. - 9:26 p.m.STL-YUL
13h 21m2 stops
C$ 458Delta
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Tue, 8 Apr
12:00 p.m. - 8:29 p.m.STL-YYZ
7h 29m1 stop
C$ 464Delta
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Wed, 14 May
5:00 a.m. - 4:44 p.m.STL-YUL
10h 44m2 stops
C$ 491American Airlines
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Fri, 4 Apr
8:00 a.m. - 5:23 p.m.STL-YUL
8h 23m2 stops
C$ 499United Airlines
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Sat, 5 Apr
3:50 p.m. - 6:45 p.m.STL-YYZ
1h 55mdirect
1:50 p.m. - 3:06 p.m.YYZ-STL
2h 16mdirect
C$ 814Air Canada
Find Deal
Sat, 25 Jan - Sat, 1 Feb
3:50 p.m. - 6:45 p.m.STL-YYZ
1h 55mdirect
1:50 p.m. - 3:06 p.m.YYZ-STL
2h 16mdirect
C$ 841Air Canada
Find Deal
Wed, 8 Jan - Wed, 22 Jan
3:50 p.m. - 6:45 p.m.STL-YYZ
1h 55mdirect
1:50 p.m. - 3:06 p.m.YYZ-STL
2h 16mdirect
C$ 889United Airlines
Find Deal
Mon, 10 Feb - Mon, 17 Feb
3:50 p.m. - 6:45 p.m.STL-YYZ
1h 55mdirect
1:50 p.m. - 3:06 p.m.YYZ-STL
2h 16mdirect
C$ 890United Airlines
Find Deal
Mon, 3 Feb - Mon, 10 Feb
3:50 p.m. - 6:45 p.m.STL-YYZ
1h 55mdirect
1:50 p.m. - 3:06 p.m.YYZ-STL
2h 16mdirect
C$ 965United Airlines
Find Deal
Thu, 16 Jan - Wed, 22 Jan
3:50 p.m. - 6:45 p.m.STL-YYZ
1h 55mdirect
1:50 p.m. - 3:06 p.m.YYZ-STL
2h 16mdirect
C$ 1,027United Airlines
Find Deal
Wed, 8 Jan - Wed, 22 Jan
3:50 p.m. - 6:45 p.m.STL-YYZ
1h 55mdirect
1:50 p.m. - 3:06 p.m.YYZ-STL
2h 16mdirect
C$ 1,042Air Canada
Find Deal
Mon, 13 Jan - Wed, 15 Jan
1:30 p.m. - 5:00 p.m.STL-YUL
2h 30mdirect
6:10 p.m. - 8:01 p.m.YUL-STL
2h 51mdirect
C$ 1,091Air Canada
Find Deal
Wed, 28 May - Mon, 2 Jun
3:50 p.m. - 6:45 p.m.STL-YYZ
1h 55mdirect
1:50 p.m. - 3:06 p.m.YYZ-STL
2h 16mdirect
C$ 1,104Air Canada
Find Deal
Wed, 8 Jan - Sat, 11 Jan
3:50 p.m. - 6:45 p.m.STL-YYZ
1h 55mdirect
1:50 p.m. - 3:06 p.m.YYZ-STL
2h 16mdirect
C$ 1,143Air Canada
Find Deal
Fri, 14 Mar - Tue, 18 Mar

Frontier flights from St. Louis to Region of Ontario

Our best Frontier deals on St. Louis to Region of Ontario flight tickets
Frontier
25 Jan
STL8:50 a.m.Lambert-St Louis
11h 27m
1 stop
YYZ9:17 p.m.Toronto Pearson Intl
1 Feb
YYZ9:10 p.m.Toronto Pearson Intl
23h 21m
2 stops
STL7:31 p.m.Lambert-St Louis
Frontier
25 Jan
STL5:50 p.m.Lambert-St Louis
14h 54m
2 stops
YYZ9:44 a.m.Toronto Pearson Intl
1 Feb
YYZ9:10 p.m.Toronto Pearson Intl
23h 21m
2 stops
STL7:31 p.m.Lambert-St Louis

American Airlines flights from St. Louis to Region of Ontario

Our best American Airlines deals on St. Louis to Region of Ontario flight tickets
American Airlines
25 Jan
STL11:47 a.m.Lambert-St Louis
8h 33m
1 stop
YYZ9:20 p.m.Toronto Pearson Intl
1 Feb
YYZ6:15 a.m.Toronto Pearson Intl
8h 52m
1 stop
STL2:07 p.m.Lambert-St Louis
American Airlines
3 Feb
STL5:40 a.m.Lambert-St Louis
10h 55m
1 stop
YYZ5:35 p.m.Toronto Pearson Intl
10 Feb
YYZ1:14 p.m.Toronto Pearson Intl
9h 55m
1 stop
STL10:09 p.m.Lambert-St Louis
American Airlines
16 Jan
STL5:40 a.m.Lambert-St Louis
10h 55m
1 stop
YYZ5:35 p.m.Toronto Pearson Intl
22 Jan
YYZ1:14 p.m.Toronto Pearson Intl
9h 55m
1 stop
STL10:09 p.m.Lambert-St Louis

See travel insights to Ontario from

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 month to fly to Region of Ontario?

In general, March is the cheapest month to fly from St. Louis to Region of Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 310. If you are unable to visit Region of Ontario during the month of March, then departing from St. Louis during the month April is also very affordable. Most momondo users find prices during this month for around C$ 329.

What is the cheapest day to depart on your flight to Region of Ontario?

The cheapest day to depart from St. Louis to Region of Ontario is on a Monday. Travellers who choose to depart for Region of Ontario on a Monday will often find tickets for as low as C$ 0. The most expensive day to fly to Region of Ontario is Wednesday, with ticket prices averaging around C$ 942.

What is the cheapest time of day to depart on your flight to Region of Ontario?

Our most recent data shows that the best time of day to fly to Region of Ontario is in the evening. Flights from St. Louis to Region of Ontario during this time can be as low as C$ 0. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are C$ 891 on average. Flights to Region of Ontario from St. Louis in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Lambert-St Louis to Ontario flight route?

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

How far in advance should I book a flight to Region of Ontario?

In general, most travellers find the cheapest time to book a flight to Region of Ontario is about 53 days prior to their departure date, when tickets on average are C$ 632. In the past 72 hours, momondo users found flights from St. Louis to Region of Ontario for as low as C$ 407.

What cabin class options are available on Lambert-St Louis to Ontario flights?

There are 1 cabin classes available to choose from on Lambert-St Louis to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

You could potentially save up to 65% 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

C$ 115

Fastest flight time

1h 55m

Direct flights

Every day

Airports in Region of Ontario

2 airports
The best one-way flight to Region of Ontario from St. Louis in the past 72 hours is C$ 115. The best round-trip flight deal from St. Louis to Region of Ontario found on momondo in the last 72 hours is C$ 376.
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 2 airports near Region of Ontario: 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 are refreshed on a daily basis.

  • 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 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 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 C$ 372Free CancellationRating
7.0
8,441 reviews
Search Air Canada flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Ontario for you.

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

Yes. momondo allows you to filter the results for St. Louis to Ontario flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between St. Louis and Ontario by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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 not ready to book a flight from St. Louis to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ontario and let you know when they change.


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Popular flights according to clicks in the last 7 days on momondo