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St. Louis

$188+ 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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — STL
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap 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 September 16, 2025.

Round-trip from

$363
(American Airlines)

One-way from

$188
(Kiwi.com)

Popular in

June

Cheapest in

July

Average price

$560

Good round-trip deal

$1,065 or less
From Quebec to Lambert-St Louis
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One-way flight from Quebec to Lambert-St Louis
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Highest demand for flights based on searches. 7% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Quebec to Lambert-St Louis.
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Find 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 September 16, 2025.

This American Airlines deal was found by Cheapflights users on 9/14. 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 10/297:50 amYUL - STL
2 stops11h 30mAmerican Airlines
Wed 11/55:40 pmSTL - YUL
1 stop20h 31mAmerican Airlines
Deal found 9/14$363
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/113:50 pmYOW - STL
1 stop19h 12mMultiple Airlines
Sat 10/187:15 pmSTL - YOW
2 stops20h 42mMultiple Airlines
Deal found 9/14$377
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Fri 10/2411:55 amYOW - STL
2 stops25h 49mUnited Airlines
Tue 10/281:35 pmSTL - YOW
2 stops19h 51mUnited Airlines
Deal found 9/14$434
This United Airlines deal was found by Cheapflights users on 9/15. 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 11/66:00 amYUL - STL
1 stop10h 46mUnited Airlines
Sat 11/86:43 pmSTL - YUL
2 stops17h 03mUnited Airlines
Deal found 9/15$450
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/85:10 pmYUL - STL
2 stops18h 02mMultiple Airlines
Sun 11/1612:20 pmSTL - YUL
1 stop25h 50mMultiple Airlines
Deal found 9/14$451
This Delta deal was found by Cheapflights users on 9/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/57:30 pmYUL - STL
1 stop13h 43mDelta
Wed 11/129:35 amSTL - YUL
1 stop8h 05mDelta
Deal found 9/14$465
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 10/296:00 amYUL - STL
1 stop10h 49mUnited Airlines
Wed 11/56:30 amSTL - YUL
1 stop8h 27mUnited Airlines
Deal found 9/14$479
This American Airlines deal was found by Cheapflights users on 9/16. 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.
Mon 11/173:49 pmYUL - STL
1 stop9h 07mAmerican Airlines
Thu 11/206:00 amSTL - YUL
1 stop5h 15mAmerican Airlines
Deal found 9/16$504
This Mytrip deal was found by Cheapflights users on 9/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/306:00 amYUL - STL
3 stops27h 40mMultiple Airlines
Thu 10/210:35 amSTL - YUL
2 stops12h 52mMultiple Airlines
Deal found 9/14$512
This Gotogate deal was found by Cheapflights users on 9/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/188:50 amYUL - STL
2 stops7h 39mAir Canada
Sun 11/304:05 pmSTL - YUL
1 stop6h 17mAir Canada
Deal found 9/16$513
This Gotogate deal was found by Cheapflights users on 9/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/94:00 pmYUL - STL
1 stop4h 38mAir Canada
Mon 10/134:05 pmSTL - YUL
1 stop4h 35mAir Canada
Deal found 9/14$522
This United deal was found by Cheapflights users on 9/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/245:25 pmYOW - STL
1 stop23h 19mMultiple Airlines
Tue 10/284:05 pmSTL - YOW
1 stop6h 03mMultiple Airlines
Deal found 9/14$590

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 September 16, 2025.
Use the filters below to find and compare flights from Quebec to St. Louis that are best for you.

Fly from

Quebec

Fly to

St. Louis

Route

Depart

Return

Price

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 11/6

3:52 pm-11:56 pm

1 stop9h 04m

Lambert-St Louis

Sat 11/8

7:58 pm-3:11 pm

1 stop18h 13m

$363

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 10/29

7:50 am-6:20 pm

2 stops11h 30m

Lambert-St Louis

Wed 11/5

6:00 am-10:39 pm

2 stops15h 39m

$368

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 10/11

3:50 pm-10:02 am

1 stop19h 12m

Lambert-St Louis

Sat 10/18

7:15 pm-4:57 pm

2 stops20h 42m

$377

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 10/24

11:55 am-12:44 pm

2 stops25h 49m

Lambert-St Louis

Tue 10/28

1:35 pm-10:26 am

2 stops19h 51m

$434

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 11/6

6:00 am-3:46 pm

1 stop10h 46m

Lambert-St Louis

Sat 11/8

6:43 pm-12:46 pm

2 stops17h 03m

$450

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 11/5

7:30 pm-8:13 am

1 stop13h 43m

Lambert-St Louis

Wed 11/12

9:35 am-6:40 pm

1 stop8h 05m

$465

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 11/5

6:00 am-5:39 pm

1 stop12h 39m

Lambert-St Louis

Wed 11/12

6:30 am-9:12 pm

2 stops13h 42m

$479

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 10/29

6:00 am-3:49 pm

1 stop10h 49m

Lambert-St Louis

Wed 11/5

6:30 am-3:57 pm

1 stop8h 27m

$479

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 11/17

3:49 pm-11:56 pm

1 stop9h 07m

Lambert-St Louis

Thu 11/20

6:00 am-12:15 pm

1 stop5h 15m

$504

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Tue 9/30

6:00 am-8:40 am

3 stops27h 40m

Lambert-St Louis

Thu 10/2

10:35 am-12:27 am

2 stops12h 52m

$512

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 24 results
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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, August is the cheapest month in which you can book a flight from Quebec to St. Louis (average of $311). Flying from Quebec to St. Louis in March is currently the most expensive (average of $356). 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 September 16, 2025.

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 September 16, 2025.

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).

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 $363, American Airlines can have you in St. Louis from Quebec in 9h 04m. The distance from Quebec to St. Louis is about 967 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 Sun Country Air (100%), Air Canada (70%) or Jazz (70%) 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 $561. On average you can expect to pay $1,065. The most popular route, (Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis), can usually be booked for $430.

  • 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, August is the cheapest month in which you can book a flight from Quebec to St. Louis (average of $311). Flying from Quebec to St. Louis in March is currently the most expensive (average of $356). 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
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Quebec to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Quebec to St. Louis

Discover the top 2 airlines 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$435Average$561FlexibilityNo cancel feeOn-time67%
DeltaCheapest$452Average$511FlexibilityNo cancel feeOn-timeN/A

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