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St. Louis

$239+ Cheap flights from Quebec to St. Louis (STL)

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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — STL
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
1 adult, Economy
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Cheap flight deals from Quebec to St. Louis

Cheapest flights from Quebec to St. Louis
Explore the most affordable flight options available from Quebec to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 27, 2026.

This American Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1512:31 pm
YUL
-
STL
1 stop12h 56m
American Airlines
Sat 9/197:27 am
STL
-
YUL
1 stop8h 26m
American Airlines
Deal found 7/23$407
This American Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/212:30 pm
YUL
-
STL
1 stop12h 44m
American Airlines
Wed 9/97:26 am
STL
-
YUL
2 stops13h 16m
American Airlines
Deal found 7/26$424
This American Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:30 pm
YUL
-
STL
1 stop9h 38m
American Airlines
Mon 10/195:27 pm
STL
-
YUL
1 stop17h 17m
American Airlines
Deal found 7/24$445
This American Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:34 pm
YUL
-
STL
1 stop17h 46m
American Airlines
Wed 10/145:00 am
STL
-
YUL
1 stop10h 52m
American Airlines
Deal found 7/25$446
This American Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:34 pm
YUL
-
STL
1 stop17h 46m
American Airlines
Sat 9/267:27 am
STL
-
YUL
1 stop8h 26m
American Airlines
Deal found 7/23$454
This Air Canada deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/232:35 pm
YOW
-
STL
1 stop5h 06m
Air Canada
Mon 10/264:05 pm
STL
-
YOW
1 stop4h 45m
Air Canada
Deal found 7/23$466
This Air Canada deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/149:00 am
YOW
-
STL
1 stop6h 04m
Air Canada
Sat 8/2212:10 pm
STL
-
YOW
1 stop6h 35m
Air Canada
Deal found 7/24$467
This Air Canada deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1510:00 am
YOW
-
STL
1 stop5h 00m
Air Canada
Sat 9/198:55 am
STL
-
YOW
1 stop5h 15m
Air Canada
Deal found 7/23$471
This Air Canada deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/214:00 pm
YOW
-
STL
1 stop5h 24m
Air Canada
Fri 8/288:55 am
STL
-
YOW
1 stop5h 15m
Air Canada
Deal found 7/24$472
This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/228:30 am
YUL
-
STL
2 stops14h 30m
United Airlines
Tue 9/299:04 am
STL
-
YUL
1 stop8h 51m
United Airlines
Deal found 7/23$483
This United Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/199:15 am
YUL
-
STL
2 stops11h 46m
United Airlines
Mon 9/2112:59 pm
STL
-
YUL
1 stop20h 41m
United Airlines
Deal found 7/22$484
This United Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/271:15 pm
YUL
-
STL
1 stop9h 45m
United Airlines
Mon 8/316:54 pm
STL
-
YUL
1 stop21h 36m
United Airlines
Deal found 7/22$489

Find flight deals from Quebec to St. Louis

Keep the following information in mind while searching for Quebec to St. Louis flight deals. Data was last updated July 27, 2026.

Round-trip from

$407
(American Airlines)

One-way from

$239
(American Airlines)

Popular in

September

Cheapest in

June

Average price

$552

Good one-way deal

$305 or less
From Quebec to Lambert-St Louis
Search Deals
One-way flight from Quebec to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($114 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a one-way flight from Quebec to Lambert-St Louis.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Quebec to St. Louis 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 2,558,603 searches. Data last updated July 27, 2026.
Use the filters below to find and compare flights from Quebec to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 8/14

9:00 am-2:04 pm

1 stop6h 04m

Lambert-St Louis

Sat 8/22

12:10 pm-7:45 pm

1 stop6h 35m

$467

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Tue 9/22

6:10 am-3:38 pm

1 stop10h 28m

Lambert-St Louis

Wed 9/30

8:00 am-6:55 pm

1 stop9h 55m

$483

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Tue 9/15

8:30 am-10:00 pm

2 stops14h 30m

Lambert-St Louis

Sat 9/19

8:00 am-9:26 pm

1 stop12h 26m

$483

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sat 9/19

9:15 am-8:01 pm

2 stops11h 46m

Lambert-St Louis

Mon 9/21

12:59 pm-10:40 am

1 stop20h 41m

$484

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 8/27

1:15 pm-10:00 pm

1 stop9h 45m

Lambert-St Louis

Mon 8/31

6:54 pm-5:30 pm

1 stop21h 36m

$489
Quickest round-trip

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 10/15

4:55 pm-6:41 pm

Nonstop2h 46m

Lambert-St Louis

Mon 10/19

12:10 pm-3:41 pm

Nonstop2h 31m

$500

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 9/2

6:30 pm-2:57 pm

1 stop21h 27m

Lambert-St Louis

Wed 9/9

8:30 am-7:01 pm

1 stop9h 31m

$503

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 10/15

1:15 pm-9:21 pm

1 stop9h 06m

Lambert-St Louis

Mon 10/19

5:36 pm-10:40 am

1 stop16h 04m

$504

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 10/23

6:25 am-12:13 pm

1 stop6h 48m

Lambert-St Louis

Mon 10/26

5:00 am-3:07 pm

2 stops9h 07m

$520

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 9/19

6:00 am-9:39 am

1 stop4h 39m

Lambert-St Louis

Wed 9/23

10:53 am-5:16 pm

1 stop5h 23m

$520

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/23

Showing 1-10 of 26 resultsSorted by cheapest first
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Best time to book a flight from Quebec to St. Louis

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

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

Currently, February is the cheapest month in which you can book a flight from Quebec to St. Louis (average of $548). Flying from Quebec to St. Louis in December is currently the most expensive (average of $803). 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 QC to STL?

Find hourly flight availability from Quebec to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 27, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Quebec to St. Louis as you normally would.

Weekly flight availability from Quebec to St. Louis

Explore weekly flight availability from Quebec to St. Louis. 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 July 27, 2026.

The most flights from CAQC to STL 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 Quebec to St. Louis?

Airfare is below average for this route at the moment.
Quebec to St. Louis flights typically cost between $442 and $789 in September.
The cheapest round-trip price found within the last 5 days was $407 on American Airlines (Sep 15-Sep 19).

Related info for your journey

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

    Lambert-St Louis (STL) is the airport you will fly into if you book a flight from Quebec to St. Louis. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.

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

    For as low as $467, Air Canada can have you in St. Louis from Quebec in 6h 04m. The distance from Quebec to St. Louis is about 878 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    No one likes to see their flight delayed. When booking a flight from Quebec to St. Louis consider choosing United Airlines (64%), Air Canada (59%) or Jazz (50%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Quebec to St. Louis?

    The cheapest flight price from Quebec to St. Louis is $264. On average you can expect to pay $339. The most popular route, (Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis), can usually be booked for $503.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Quebec to St. Louis 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 Quebec to St. Louis?

    Currently, February is the cheapest month in which you can book a flight from Quebec to St. Louis (average of $548). Flying from Quebec to St. Louis in December is currently the most expensive (average of $803). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Farmington

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.

Top airline flying from Quebec to St. Louis

Discover the top airline that operate flights from Quebec to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$498Average$575FlexibilityNo cancel feeOn-time67%

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