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Cheap flights from St. Louis to Quebec from C$ 175

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 22/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YUL
8 Mar — 15 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from St. Louis to Quebec

Enter your travel dates to find the best prices.

Cheapest flights from St. Louis to Quebec
Explore the most affordable flight options available from St. Louis to Quebec. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 February 2026.

Tue 7/45:21 p.m.
STL
-
YUL
1 stop17h 23m
American Airlines
Thu 9/412:30 p.m.
YUL
-
STL
1 stop12h 16m
American Airlines
Deal found 3/2C$ 468
Tue 5/58:03 p.m.
STL
-
YUL
1 stop14h 41m
American Airlines
Sat 9/51:03 p.m.
YUL
-
STL
2 stops11h 53m
American Airlines
Deal found 4/2C$ 482
Fri 17/45:21 p.m.
STL
-
YUL
1 stop17h 23m
American Airlines
Tue 21/412:30 p.m.
YUL
-
STL
1 stop12h 16m
American Airlines
Deal found 3/2C$ 539
Wed 22/47:45 a.m.
STL
-
YUL
1 stop8h 45m
United Airlines
Sun 26/46:30 p.m.
YUL
-
STL
1 stop27h 38m
United Airlines
Deal found 4/2C$ 542
Fri 17/45:21 p.m.
STL
-
YUL
1 stop17h 23m
American Airlines
Mon 20/412:30 p.m.
YUL
-
STL
1 stop10h 47m
American Airlines
Deal found 2/2C$ 577
Tue 21/42:33 p.m.
STL
-
YUL
1 stop20h 11m
American Airlines
Fri 24/47:29 a.m.
YUL
-
STL
1 stop11h 35m
American Airlines
Deal found 3/2C$ 623
Sun 22/38:06 p.m.
STL
-
YUL
2 stops27h 32m
Multiple Airlines
Sun 29/34:35 p.m.
YUL
-
STL
1 stop15h 27m
Multiple Airlines
Deal found 5/2C$ 666
Fri 3/47:45 a.m.
STL
-
YUL
1 stop12h 41m
United Airlines
Mon 6/49:15 a.m.
YUL
-
STL
1 stop24h 20m
United Airlines
Deal found 5/2C$ 679
Sun 3/56:29 a.m.
STL
-
YUL
1 stop14h 08m
American Airlines
Sat 9/512:30 p.m.
YUL
-
STL
1 stop12h 26m
American Airlines
Deal found 4/2C$ 688
Sat 28/26:25 a.m.
STL
-
YUL
1 stop8h 36m
United Airlines
Wed 4/31:10 p.m.
YUL
-
STL
1 stop8h 55m
United Airlines
Deal found 4/2C$ 694
Thu 24/98:55 a.m.
STL
-
YQB
1 stop6h 12m
Air Canada
Mon 28/91:05 p.m.
YQB
-
STL
1 stop6h 36m
Air Canada
Deal found 3/2C$ 918
Sat 26/92:40 p.m.
STL
-
YQB
2 stops7h 11m
Air Canada
Mon 28/91:05 p.m.
YQB
-
STL
1 stop6h 36m
Air Canada
Deal found 3/2C$ 922

Find flight deals from St. Louis to Quebec

Keep the following information in mind while searching for St. Louis to Quebec flight deals. Data was last updated 6 February 2026.

Round-trip from

C$ 468

One-way from

C$ 175

Popular in

October

Cheapest in

June
American Airlines
  • American Airlines
  • 7/4-9/4
  • 2 total stops
  • 29h 39m total
  • St. Louis to Quebec
Search Deals
American Airlines
  • American Airlines
  • 21/4
  • 1 total stop
  • 14h 41m total
  • St. Louis to Quebec
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 196 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 38 potential savings vs. average RT price).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Quebec 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 629,999 searches. Data last updated 6 February 2026.
Use the filters below to find and compare flights from St. Louis to Quebec that are best for you.

Fly from

St. Louis

Fly to

Quebec

Route

Depart

Return

Price

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 7/4

5:21 p.m.-11:44 a.m.

1 stop17h 23m

Montreal Pierre Elliott Trudeau Intl

Thu 9/4

12:30 p.m.-11:46 p.m.

1 stop12h 16m

C$ 468

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 5/5

8:03 p.m.-11:44 a.m.

1 stop14h 41m

Montreal Pierre Elliott Trudeau Intl

Sat 9/5

12:30 p.m.-11:56 p.m.

1 stop12h 26m

C$ 468

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 17/4

5:21 p.m.-11:44 a.m.

1 stop17h 23m

Montreal Pierre Elliott Trudeau Intl

Tue 21/4

12:30 p.m.-11:46 p.m.

1 stop12h 16m

C$ 539

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 22/4

7:45 a.m.-5:30 p.m.

1 stop8h 45m

Montreal Pierre Elliott Trudeau Intl

Sun 26/4

6:30 p.m.-9:08 p.m.

1 stop27h 38m

C$ 542

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 17/4

5:21 p.m.-11:44 a.m.

1 stop17h 23m

Montreal Pierre Elliott Trudeau Intl

Mon 20/4

12:30 p.m.-10:17 p.m.

1 stop10h 47m

C$ 577

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 22/4

8:03 p.m.-11:44 a.m.

1 stop14h 41m

Montreal Pierre Elliott Trudeau Intl

Fri 24/4

7:45 a.m.-7:29 p.m.

1 stop12h 44m

C$ 623

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 3/4

7:45 a.m.-9:26 p.m.

1 stop12h 41m

Montreal Pierre Elliott Trudeau Intl

Mon 6/4

9:15 a.m.-8:35 a.m.

1 stop24h 20m

C$ 679

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 3/5

6:29 a.m.-9:37 p.m.

1 stop14h 08m

Montreal Pierre Elliott Trudeau Intl

Sat 9/5

12:30 p.m.-11:56 p.m.

1 stop12h 26m

C$ 688

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 28/2

6:25 a.m.-4:01 p.m.

1 stop8h 36m

Montreal Pierre Elliott Trudeau Intl

Wed 4/3

1:10 p.m.-9:05 p.m.

1 stop8h 55m

C$ 694

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 22/4

5:21 p.m.-11:44 a.m.

1 stop17h 23m

Montreal Pierre Elliott Trudeau Intl

Sun 26/4

12:30 p.m.-10:17 p.m.

1 stop10h 47m

C$ 712

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/2

Showing 1-10 of 29 results
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Best time to book a flight from St. Louis to Quebec

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

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Quebec

What is the cheapest month to book a flight from St. Louis to Quebec?

Currently, June is the cheapest month in which you can book a flight from St. Louis to Quebec (average of C$ 260). Flying from St. Louis to Quebec in January is currently the most expensive (average of C$ 884). 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.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Quebec. 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 Quebec?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Quebec. It is only a 20.4 km journey to Lambert-St Louis (STL) from St. Louis’s city centre.

  • How long is the flight from St. Louis to Quebec?

    There are many flights that can get you from St. Louis to Quebec in 5h. Fly via American Airlines, United Airlines, or Air Canada to get the fastest option. Airlines will cover a distance of 1782 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from St. Louis to Quebec that include hotel bookings?

    Yes. In addition to deals on St. Louis to Quebec flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Quebec?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Quebec.

  • Can I find deals for business class flights from St. Louis to Quebec?

    Yes. Cheapflights offers flight deals from St. Louis to Quebec by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Quebec?

    Currently, June is the cheapest month in which you can book a flight from St. Louis to Quebec (average of C$ 260). Flying from St. Louis to Quebec in January is currently the most expensive (average of C$ 884). 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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Cheapflights helps you search for flights from St. Louis to Quebec via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from St. Louis to Quebec.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from St. Louis to Quebec, users can toggle the no change fees filter when performing a flight search.

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

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

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