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Cheap flights from St. Louis to Quebec from C$ 308

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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YUL
29 Jun — 6 Jul1
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 30 May 2026.

Sat 13/61:05 p.m.
STL
-
YUL
Nonstop2h 35m
Air Canada
Mon 15/66:30 p.m.
YUL
-
STL
Nonstop2h 55m
Air Canada
Deal found 25/5C$ 657
Tue 23/67:03 a.m.
STL
-
YUL
1 stop8h 48m
American Airlines
Tue 30/65:33 p.m.
YUL
-
STL
1 stop15h 58m
American Airlines
Deal found 26/5C$ 715
Wed 29/76:55 a.m.
STL
-
YUL
1 stop8h 52m
American Airlines
Wed 12/812:30 p.m.
YUL
-
STL
1 stop12h 44m
American Airlines
Deal found 29/5C$ 746
Tue 18/88:07 p.m.
STL
-
YUL
1 stop14h 36m
American Airlines
Sat 22/812:30 p.m.
YUL
-
STL
1 stop12h 28m
American Airlines
Deal found 26/5C$ 750
Tue 16/61:05 p.m.
STL
-
YUL
Nonstop2h 35m
Air Canada
Thu 18/66:30 p.m.
YUL
-
STL
Nonstop2h 55m
Air Canada
Deal found 27/5C$ 755
Sat 4/75:06 p.m.
STL
-
YUL
2 stops20h 02m
Multiple Airlines
Sat 11/712:47 p.m.
YUL
-
STL
1 stop21h 44m
Multiple Airlines
Deal found 25/5C$ 763
Thu 17/97:28 a.m.
STL
-
YUL
1 stop14h 26m
American Airlines
Tue 22/910:30 a.m.
YUL
-
STL
1 stop11h 47m
American Airlines
Deal found 29/5C$ 764
Tue 7/78:41 p.m.
STL
-
YUL
1 stop19h 06m
American Airlines
Thu 9/77:17 a.m.
YUL
-
STL
1 stop11h 04m
American Airlines
Deal found 28/5C$ 766
Sat 13/62:15 p.m.
STL
-
YUL
1 stop6h 35m
Multiple Airlines
Mon 15/66:30 a.m.
YUL
-
STL
3 stops13h 06m
Multiple Airlines
Deal found 25/5C$ 768
Sat 20/61:20 p.m.
STL
-
YQB
1 stop5h 21m
Air Canada
Tue 23/62:45 p.m.
YQB
-
STL
1 stop6h 40m
Air Canada
Deal found 29/5C$ 945
Sat 20/66:00 a.m.
STL
-
YQB
1 stop5h 02m
United Airlines
Tue 23/66:00 a.m.
YQB
-
STL
2 stops10h 46m
United Airlines
Deal found 27/5C$ 970
Tue 30/67:51 p.m.
STL
-
YQB
2 stops18h 40m
American Airlines
Tue 7/74:12 p.m.
YQB
-
STL
2 stops17h 57m
American Airlines
Deal found 27/5C$ 995

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 30 May 2026.

Round-trip from

C$ 657

One-way from

C$ 308

Popular in

October

Cheapest in

June

Average price

C$ 859
Air Canada
  • Air Canada
  • 13/6-15/6
  • Nonstop
  • 5h 30m total
  • St. Louis to Quebec
Search Deals
Air Canada
  • Air Canada
  • 10/7
  • 1 total stop
  • 6h 57m total
  • St. Louis to Quebec
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 179 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 30 May 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

Tue 23/6

7:08 a.m.-6:54 p.m.

2 stops10h 46m

Montreal Pierre Elliott Trudeau Intl

Tue 30/6

7:00 a.m.-2:52 p.m.

1 stop8h 52m

C$ 806
Quickest round-trip

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 16/11

6:30 a.m.-1:10 p.m.

1 stop5h 40m

Montreal Pierre Elliott Trudeau Intl

Wed 18/11

7:00 a.m.-11:09 a.m.

1 stop5h 09m

C$ 812

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 18/9

9:40 a.m.-5:30 p.m.

1 stop6h 50m

Montreal Pierre Elliott Trudeau Intl

Sun 20/9

6:00 a.m.-11:17 a.m.

1 stop6h 17m

C$ 819

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 29/7

8:55 a.m.-4:52 p.m.

1 stop6h 57m

Montreal Pierre Elliott Trudeau Intl

Sun 2/8

9:10 a.m.-2:02 p.m.

1 stop5h 52m

C$ 822

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 16/11

4:15 p.m.-10:53 p.m.

1 stop5h 38m

Montreal Pierre Elliott Trudeau Intl

Wed 18/11

8:50 a.m.-3:30 p.m.

2 stops7h 40m

C$ 829

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 29/7

9:30 a.m.-5:30 p.m.

1 stop7h 00m

Montreal Pierre Elliott Trudeau Intl

Sat 1/8

6:00 a.m.-3:46 p.m.

2 stops10h 46m

C$ 833

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 28/7

9:20 a.m.-5:30 p.m.

1 stop7h 10m

Montreal Pierre Elliott Trudeau Intl

Sat 1/8

6:00 a.m.-3:46 p.m.

2 stops10h 46m

C$ 833

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 13/7

9:20 a.m.-5:30 p.m.

1 stop7h 10m

Montreal Pierre Elliott Trudeau Intl

Sat 25/7

6:00 a.m.-3:46 p.m.

2 stops10h 46m

C$ 833

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 18/7

6:00 a.m.-2:40 p.m.

2 stops7h 40m

Montreal Pierre Elliott Trudeau Intl

Fri 24/7

4:55 p.m.-11:29 p.m.

1 stop7h 34m

C$ 833

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 14/7

6:00 a.m.-7:45 p.m.

2 stops12h 45m

Montreal Pierre Elliott Trudeau Intl

Thu 16/7

9:45 a.m.-3:46 p.m.

1 stop7h 01m

C$ 833

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/5

Showing 1-10 of 42 resultsSorted by cheapest first
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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, August is the cheapest month in which you can book a flight from St. Louis to Quebec (average of C$ 355). Flying from St. Louis to Quebec in November is currently the most expensive (average of C$ 897). 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.

What is the cheapest time of day to fly from STL to QC?

Find hourly flight availability from St. Louis to Quebec. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 May 2026.

When flying from St. Louis to Quebec, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 30 May 2026.

The most flights from STL to CAQC are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 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 5h 21m. Fly via Delta, 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, August is the cheapest month in which you can book a flight from St. Louis to Quebec (average of C$ 355). Flying from St. Louis to Quebec in November is currently the most expensive (average of C$ 897). 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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