Find flights
Deals
When to book
FAQs

Cheap flights from St. Louis to Quebec from C$ 245

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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YUL
3 May — 10 May1
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 3 April 2026.

Wed 29/48:03 p.m.
STL
-
YUL
1 stop14h 41m
American Airlines
Sat 2/51:03 p.m.
YUL
-
STL
2 stops11h 43m
American Airlines
Deal found 31/3C$ 636
Tue 28/48:03 p.m.
STL
-
YUL
1 stop14h 41m
American Airlines
Tue 5/512:30 p.m.
YUL
-
STL
1 stop10h 49m
American Airlines
Deal found 29/3C$ 675
Sat 25/48:03 p.m.
STL
-
YUL
1 stop14h 41m
American Airlines
Sat 2/51:03 p.m.
YUL
-
STL
2 stops11h 43m
American Airlines
Deal found 1/4C$ 689
Wed 13/55:27 p.m.
STL
-
YUL
2 stops19h 41m
Multiple Airlines
Wed 20/57:10 a.m.
YUL
-
STL
1 stop8h 21m
Multiple Airlines
Deal found 29/3C$ 704
Thu 30/411:21 a.m.
STL
-
YUL
2 stops25h 47m
Multiple Airlines
Thu 7/56:00 a.m.
YUL
-
STL
1 stop4h 29m
Multiple Airlines
Deal found 2/4C$ 705
Tue 21/43:24 p.m.
STL
-
YUL
1 stop6h 34m
American Airlines
Tue 28/412:30 p.m.
YUL
-
STL
1 stop10h 49m
American Airlines
Deal found 1/4C$ 708
Wed 13/51:05 p.m.
STL
-
YUL
Nonstop2h 35m
Air Canada
Wed 20/56:30 p.m.
YUL
-
STL
Nonstop2h 55m
Air Canada
Deal found 29/3C$ 714
Thu 28/57:00 a.m.
STL
-
YUL
1 stop8h 53m
American Airlines
Wed 3/612:30 p.m.
YUL
-
STL
1 stop12h 24m
American Airlines
Deal found 1/4C$ 716
Sat 16/57:05 a.m.
STL
-
YUL
1 stop5h 16m
Air Canada
Sat 23/56:30 p.m.
YUL
-
STL
Nonstop2h 55m
Air Canada
Deal found 1/4C$ 729
Sat 16/57:05 a.m.
STL
-
YQB
1 stop7h 50m
Air Canada
Sat 23/55:00 a.m.
YQB
-
STL
1 stop8h 06m
Air Canada
Deal found 1/4C$ 797
Tue 19/58:03 p.m.
STL
-
YQB
1 stop40h 14m
American Airlines
Fri 22/54:11 p.m.
YQB
-
STL
1 stop19h 37m
American Airlines
Deal found 31/3C$ 831
Tue 19/57:05 a.m.
STL
-
YQB
1 stop5h 25m
Air Canada
Fri 22/52:50 p.m.
YQB
-
STL
1 stop6h 35m
Air Canada
Deal found 30/3C$ 846

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 3 April 2026.

Round-trip from

C$ 636

One-way from

C$ 245

Popular in

March

Cheapest in

June

Average price

C$ 804
American Airlines
  • American Airlines
  • 29/4-2/5
  • 3 total stops
  • 26h 24m total
  • St. Louis to Quebec
Search Deals
American Airlines
  • American Airlines
  • 12/5
  • 1 total stop
  • 14h 41m total
  • St. Louis to Quebec
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
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 3 April 2026.
Use the filters below to find and compare flights from St. Louis to Quebec that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 28/6

3:45 p.m.-11:59 p.m.

1 stop7h 14m

Montreal Pierre Elliott Trudeau Intl

Fri 3/7

7:44 p.m.-11:40 a.m.

1 stop16h 56m

C$ 810

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 25/6

6:01 a.m.-1:09 p.m.

1 stop6h 08m

Montreal Pierre Elliott Trudeau Intl

Sat 4/7

11:23 a.m.-6:35 p.m.

1 stop8h 12m

C$ 825

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 28/4

7:45 a.m.-10:40 a.m.

1 stop25h 55m

Montreal Pierre Elliott Trudeau Intl

Wed 29/4

6:30 p.m.-10:48 a.m.

1 stop17h 18m

C$ 825

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 5/5

7:09 p.m.-10:40 a.m.

1 stop14h 31m

Montreal Pierre Elliott Trudeau Intl

Wed 6/5

2:20 p.m.-7:27 p.m.

1 stop6h 07m

C$ 826

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 3/8

5:19 p.m.-11:55 p.m.

1 stop5h 36m

Montreal Pierre Elliott Trudeau Intl

Wed 5/8

7:00 a.m.-2:35 p.m.

1 stop8h 35m

C$ 838

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 2/8

1:54 p.m.-11:25 p.m.

1 stop8h 31m

Montreal Pierre Elliott Trudeau Intl

Sat 8/8

7:00 a.m.-2:27 p.m.

1 stop8h 27m

C$ 838
Quickest round-trip

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 4/8

6:05 a.m.-1:39 p.m.

1 stop6h 34m

Montreal Pierre Elliott Trudeau Intl

Wed 5/8

5:14 p.m.-8:37 p.m.

1 stop4h 23m

C$ 838

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 2/8

6:01 a.m.-1:09 p.m.

1 stop6h 08m

Montreal Pierre Elliott Trudeau Intl

Thu 6/8

9:45 a.m.-2:23 p.m.

1 stop5h 38m

C$ 838

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 3/8

1:13 p.m.-9:26 p.m.

1 stop7h 13m

Montreal Pierre Elliott Trudeau Intl

Sun 9/8

6:10 a.m.-12:11 p.m.

1 stop7h 01m

C$ 838

St. LouisQuébec City

STL - YQB

STLYQB

Lambert-St Louis

Wed 20/5

8:03 p.m.-1:17 p.m.

1 stop16h 14m

Québec City

Sat 23/5

5:55 p.m.-2:03 p.m.

1 stop21h 08m

C$ 850

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/3

Showing 1-10 of 27 resultsSorted by cheapest first
1
2
3

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

Weekly flight availability from St. Louis to Quebec

Explore weekly flight availability from St. Louis to Quebec. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 3 April 2026.

The most flights from STL to CAQC are scheduled on a Monday (1 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

How much does it cost to fly round-trip from St. Louis to Quebec?

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 6h 08m. Fly via Delta, United Airlines, or American Airlines to get the fastest option. Airlines will cover a distance of 1556 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St. Louis to Quebec?

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.