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C$ 355+ Direct flights from St. Louis

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 7/5. 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 — YUL
15 Apr — 22 Apr1
1 adult
1 adult, Economy, 0 bags

Non-stop flights from St. Louis

Enter your travel dates to find the best prices.

Cheapest flights from St. Louis
Explore the most affordable flight options available from St. Louis. Find the lowest fares based on data from user searches, with prices last updated on 16 March 2026.

Sun 26/44:05 p.m.
STL
-
YYZ
Nonstop1h 57m
Air Canada
Sun 3/511:00 a.m.
YYZ
-
STL
Nonstop2h 06m
Air Canada
Deal found 12/3C$ 700
Thu 7/57:05 a.m.
STL
-
YYZ
Nonstop1h 51m
Air Canada
Sun 10/511:00 a.m.
YYZ
-
STL
Nonstop2h 06m
Air Canada
Deal found 16/3C$ 716
Thu 30/44:05 p.m.
STL
-
YYZ
Nonstop1h 57m
Air Canada
Sun 3/56:55 p.m.
YYZ
-
STL
Nonstop2h 09m
Air Canada
Deal found 14/3C$ 718
Sat 2/51:00 p.m.
STL
-
YUL
Nonstop2h 35m
Air Canada
Mon 4/56:30 p.m.
YUL
-
STL
Nonstop2h 55m
Air Canada
Deal found 13/3C$ 748
Mon 13/44:05 p.m.
STL
-
YYZ
Nonstop1h 57m
Air Canada
Wed 15/42:10 p.m.
YYZ
-
STL
Nonstop2h 15m
Air Canada
Deal found 12/3C$ 809
Tue 14/44:05 p.m.
STL
-
YYZ
Nonstop1h 57m
Air Canada
Thu 16/42:10 p.m.
YYZ
-
STL
Nonstop2h 15m
Air Canada
Deal found 15/3C$ 840
Thu 30/72:40 p.m.
STL
-
YYZ
Nonstop1h 57m
Air Canada
Mon 3/812:55 p.m.
YYZ
-
STL
Nonstop2h 07m
Air Canada
Deal found 13/3C$ 851
Sat 2/51:00 p.m.
STL
-
YUL
Nonstop2h 35m
Air Canada
Sat 9/56:30 p.m.
YUL
-
STL
Nonstop2h 55m
Air Canada
Deal found 13/3C$ 870
Sun 26/46:15 a.m.
STL
-
YUL
Nonstop5h 54m
Air Canada
Sun 3/56:30 p.m.
YUL
-
STL
Nonstop2h 55m
Air Canada
Deal found 11/3C$ 877
Mon 13/44:05 p.m.
STL
-
YYZ
Nonstop1h 57m
Air Canada
Sat 18/42:10 p.m.
YYZ
-
STL
Nonstop2h 15m
Air Canada
Deal found 15/3C$ 884
Fri 3/44:05 p.m.
STL
-
YYZ
Nonstop1h 57m
Air Canada
Tue 7/42:10 p.m.
YYZ
-
STL
Nonstop2h 15m
Air Canada
Deal found 12/3C$ 899
Tue 18/812:10 p.m.
STL
-
YUL
Nonstop2h 32m
Air Canada
Sun 23/84:55 p.m.
YUL
-
STL
Nonstop2h 47m
Air Canada
Deal found 14/3C$ 899

Find direct flights from St. Louis within your budget

 
Use the slider to find direct flights from St. Louis within your budget. Price data is based on user searches made on Cheapflights. Over the past seven days, Cheapflights users made 629,999 searches. This data was last updated on 16 March 2026.

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 2/5

1:00 p.m.-4:35 p.m.

Nonstop2h 35m

Montreal Pierre Elliott Trudeau Intl

Mon 4/5

6:30 p.m.-8:25 p.m.

Nonstop2h 55m

C$ 748

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 26/4

4:05 p.m.-7:02 p.m.

Nonstop1h 57m

Toronto Pearson Intl

Sun 3/5

6:55 p.m.-8:04 p.m.

Nonstop2h 09m

C$ 809

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 13/4

4:05 p.m.-7:02 p.m.

Nonstop1h 57m

Toronto Pearson Intl

Wed 15/4

2:10 p.m.-3:25 p.m.

Nonstop2h 15m

C$ 809
Quickest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 3/5

7:05 a.m.-9:56 a.m.

Nonstop1h 51m

Toronto Pearson Intl

Fri 8/5

11:00 a.m.-12:06 p.m.

Nonstop2h 06m

C$ 809

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 31/8

8:55 a.m.-11:52 a.m.

Nonstop1h 57m

Toronto Pearson Intl

Mon 7/9

12:55 p.m.-2:02 p.m.

Nonstop2h 07m

C$ 809

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 21/8

2:40 p.m.-5:37 p.m.

Nonstop1h 57m

Toronto Pearson Intl

Sun 23/8

6:55 p.m.-8:02 p.m.

Nonstop2h 07m

C$ 809

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 17/4

4:05 p.m.-7:02 p.m.

Nonstop1h 57m

Toronto Pearson Intl

Tue 21/4

2:10 p.m.-3:25 p.m.

Nonstop2h 15m

C$ 840

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 18/8

12:10 p.m.-3:42 p.m.

Nonstop2h 32m

Montreal Pierre Elliott Trudeau Intl

Sun 23/8

4:55 p.m.-6:42 p.m.

Nonstop2h 47m

C$ 870

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 2/5

1:00 p.m.-4:35 p.m.

Nonstop2h 35m

Montreal Pierre Elliott Trudeau Intl

Sat 9/5

6:30 p.m.-8:25 p.m.

Nonstop2h 55m

C$ 870

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 11/5

1:00 p.m.-4:35 p.m.

Nonstop2h 35m

Montreal Pierre Elliott Trudeau Intl

Sat 16/5

6:30 p.m.-8:25 p.m.

Nonstop2h 55m

C$ 899

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/3

Showing 1-10 of 38 resultsSorted by cheapest first
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Best time to book a flight from St. Louis

Have a flexible travel schedule? Discover the best time to fly 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.

Related info for your journey

Access useful and relevant information related to your journey from St. Louis. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 16 March 2026.

  • Where can you fly direct from St. Louis?

    Currently, the most popular direct flight destination from St. Louis is Toronto Pearson Intl Airport.

  • How long is a direct flight from St. Louis?

    While the flight duration depends heavily on the destination, on average, travelers can expect non-stop flights from St. Louis to last approximately 1h 51m on average. The quickest direct flight from St. Louis at this time departs from St. Louis (1h 51m), while the longest leaves from St. Louis (1h 51m).

  • What is the best time of year to fly direct from St. Louis?

    If you're seeking the lowest price on a direct flight from St. Louis, March is worth consideration as prices are at their lowest, on average. In terms of the number of daily non-stop flights, January offers travelers the most options.

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