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Cheap flights from St. Louis to Quebec from C$ 288

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 22/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YUL
27 Aug — 3 Sep1
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 28 July 2026.

Sat 17/107:29 a.m.
STL
-
YUL
1 stop8h 23m
American Airlines
Sat 24/1012:30 p.m.
YUL
-
STL
1 stop12h 28m
American Airlines
Deal found 24/7C$ 684
Sat 17/105:00 a.m.
STL
-
YUL
1 stop10h 52m
American Airlines
Mon 26/105:34 p.m.
YUL
-
STL
1 stop18h 17m
American Airlines
Deal found 27/7C$ 685
Sat 5/98:06 p.m.
STL
-
YUL
1 stop19h 44m
American Airlines
Tue 8/95:34 p.m.
YUL
-
STL
1 stop17h 46m
American Airlines
Deal found 27/7C$ 688
Tue 18/86:00 a.m.
STL
-
YUL
1 stop9h 50m
American Airlines
Fri 21/85:34 p.m.
YUL
-
STL
1 stop15h 50m
American Airlines
Deal found 27/7C$ 700
Tue 25/89:32 a.m.
STL
-
YUL
2 stops11h 12m
American Airlines
Tue 1/95:34 p.m.
YUL
-
STL
1 stop15h 50m
American Airlines
Deal found 27/7C$ 702
Fri 11/95:00 a.m.
STL
-
YUL
1 stop10h 53m
American Airlines
Fri 18/95:34 p.m.
YUL
-
STL
1 stop17h 46m
American Airlines
Deal found 28/7C$ 738
Sat 10/105:21 p.m.
STL
-
YUL
1 stop17h 23m
American Airlines
Wed 14/1012:30 p.m.
YUL
-
STL
1 stop12h 28m
American Airlines
Deal found 26/7C$ 746
Tue 8/92:55 p.m.
STL
-
YUL
1 stop17h 54m
American Airlines
Tue 15/912:31 p.m.
YUL
-
STL
1 stop12h 56m
American Airlines
Deal found 26/7C$ 749
Tue 18/86:00 a.m.
STL
-
YUL
1 stop9h 50m
American Airlines
Sat 22/812:29 p.m.
YUL
-
STL
1 stop12h 29m
American Airlines
Deal found 27/7C$ 752
Thu 24/94:37 p.m.
STL
-
YUL
1 stop16h 12m
American Airlines
Wed 30/912:31 p.m.
YUL
-
STL
1 stop12h 56m
American Airlines
Deal found 26/7C$ 757
Mon 23/111:20 p.m.
STL
-
YQB
2 stops22h 32m
American Airlines
Fri 4/122:00 p.m.
YQB
-
STL
2 stops21h 51m
American Airlines
Deal found 26/7C$ 831
Fri 30/1011:31 a.m.
STL
-
YQB
1 stop25h 13m
American Airlines
Mon 2/112:00 p.m.
YQB
-
STL
2 stops21h 52m
American Airlines
Deal found 28/7C$ 860

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 28 July 2026.

Round-trip from

C$ 684

One-way from

C$ 288

Popular in

March

Cheapest in

February

Average price

C$ 821
American Airlines
  • American Airlines
  • 17/10-24/10
  • 2 total stops
  • 20h 51m total
  • St. Louis to Quebec
Search Deals
22/10
  • 22/10
  • 3 total stops
  • 36h 50m total
  • St. Louis to Quebec
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 28 July 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

Thu 1/10

5:00 a.m.-4:53 p.m.

1 stop10h 53m

Montreal Pierre Elliott Trudeau Intl

Mon 5/10

12:30 p.m.-11:58 p.m.

1 stop12h 28m

C$ 805

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 13/10

8:00 a.m.-10:40 a.m.

1 stop25h 40m

Montreal Pierre Elliott Trudeau Intl

Sat 17/10

9:45 a.m.-9:21 p.m.

1 stop12h 36m

C$ 835

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 1/10

8:10 p.m.-7:05 a.m.

2 stops33h 55m

Montreal Pierre Elliott Trudeau Intl

Mon 5/10

6:47 p.m.-11:42 p.m.

1 stop5h 55m

C$ 866

St. LouisQuébec City

STL - YQB

STLYQB

Lambert-St Louis

Wed 26/8

6:00 a.m.-1:15 p.m.

1 stop6h 15m

Québec City

Wed 2/9

3:56 p.m.-8:24 a.m.

2 stops17h 28m

C$ 897

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 31/12

9:37 a.m.-9:01 p.m.

1 stop10h 24m

Montreal Pierre Elliott Trudeau Intl

Wed 6/1

4:45 p.m.-8:57 a.m.

1 stop17h 12m

C$ 901

St. LouisQuébec City

STL - YQB

STLYQB

Lambert-St Louis

Fri 25/9

11:01 a.m.-1:53 p.m.

1 stop25h 52m

Québec City

Wed 30/9

3:59 p.m.-10:20 a.m.

2 stops19h 21m

C$ 915

St. LouisQuébec City

STL - YQB

STLYQB

Lambert-St Louis

Thu 17/9

11:01 a.m.-1:53 p.m.

1 stop25h 52m

Québec City

Mon 5/10

2:25 p.m.-10:51 a.m.

1 stop21h 26m

C$ 943

St. LouisQuébec City

STL - YQB

STLYQB

Lambert-St Louis

Fri 30/10

11:31 a.m.-1:44 p.m.

1 stop25h 13m

Québec City

Mon 2/11

2:00 p.m.-8:26 p.m.

1 stop7h 26m

C$ 952

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 10/10

8:00 a.m.-7:01 p.m.

1 stop10h 01m

Montreal Pierre Elliott Trudeau Intl

Wed 14/10

4:55 p.m.-6:41 p.m.

Nonstop2h 46m

C$ 989

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 26/8

8:00 a.m.-7:03 p.m.

1 stop10h 03m

Montreal Pierre Elliott Trudeau Intl

Wed 2/9

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

Nonstop2h 47m

C$ 989

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/7

Showing 1-10 of 25 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, February is the cheapest month in which you can book a flight from St. Louis to Quebec (average of C$ 714). Flying from St. Louis to Quebec in March is currently the most expensive (average of C$ 1,099). 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 28 July 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 28 July 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?

Airfare is typical for this route at the moment.
St. Louis to Quebec flights typically cost between C$ 423 and C$ 1,052 in October.
The cheapest round-trip price found within the last 5 days was C$ 684 on American Airlines (17 Oct-24 Oct).

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 10h 53m. Fly via American Airlines or United 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.

  • What are the most reliable airlines from St. Louis to Quebec?

    No one likes to see their flight delayed. When booking a flight from St. Louis to Quebec consider choosing United Airlines (61%), Air Canada (58%) or Jazz (53%) as they are the most reliable in getting you off to your destination on time.

  • 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, February is the cheapest month in which you can book a flight from St. Louis to Quebec (average of C$ 714). Flying from St. Louis to Quebec in March is currently the most expensive (average of C$ 1,099). 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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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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