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$137+ Cheap flights from St. Louis (STL) to Quebec

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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YUL
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheap 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 July 29, 2025.

Round-trip from

$334
(American Airlines)

One-way from

$137
(American Airlines)

Popular in

February

Cheapest in

June

Average price

$577

Good round-trip deal

$648 or less

Good one-way deal

$356 or less
From Lambert-St Louis to Quebec
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One-way flight from Lambert-St Louis to Quebec
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Highest demand for flights based on searches. 16% potential increase in price ($119 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Lambert-St Louis to Quebec.
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Price to beat on a one-way flight from Lambert-St Louis to Quebec.
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Find flight deals from St. Louis to Quebec

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 July 29, 2025.

This American Airlines deal was found by Cheapflights users on 7/27. 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 9/106:10 amSTL - YUL
1 stop9h 23mAmerican Airlines
Wed 9/1712:31 pmYUL - STL
1 stop10h 22mAmerican Airlines
Deal found 7/27$334
This Mytrip deal was found by Cheapflights users on 7/27. 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.
Sun 9/710:35 amSTL - YUL
2 stops12h 52mMultiple Airlines
Fri 11/149:25 amYUL - STL
2 stops8h 10mMultiple Airlines
Deal found 7/27$387
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
Wed 7/3011:24 amSTL - YOW
1 stop28h 42mMultiple Airlines
Fri 8/14:25 pmYOW - STL
1 stop18h 15mMultiple Airlines
Deal found 7/27$506
This Gotogate deal was found by Cheapflights users on 7/27. 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.
Sun 9/71:30 pmSTL - YUL
Nonstop2h 30mAir Canada
Fri 11/1411:10 amYUL - STL
1 stop5h 19mAir Canada
Deal found 7/27$511
This American Airlines deal was found by Cheapflights users on 7/27. 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 8/264:19 pmSTL - YQB
1 stop20h 25mAmerican Airlines
Tue 9/24:14 pmYQB - STL
1 stop20h 21mAmerican Airlines
Deal found 7/27$527
This United Airlines deal was found by Cheapflights users on 7/29. 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 10/143:23 pmSTL - YUL
1 stop19h 31mUnited Airlines
Sun 10/196:40 pmYUL - STL
1 stop17h 09mUnited Airlines
Deal found 7/29$546
This Delta deal was found by Cheapflights users on 7/27. 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 9/1010:45 amSTL - YUL
2 stops10h 02mDelta
Wed 9/1711:00 amYUL - STL
2 stops10h 34mDelta
Deal found 7/27$562
This United Airlines deal was found by Cheapflights users on 7/27. 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 10/225:00 amSTL - YOW
1 stop8h 04mUnited Airlines
Fri 10/245:25 pmYOW - STL
1 stop22h 02mUnited Airlines
Deal found 7/27$621
This United Airlines deal was found by Cheapflights users on 7/27. 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 8/269:17 amSTL - YQB
2 stops11h 53mUnited Airlines
Tue 9/25:20 amYQB - STL
2 stops11h 24mUnited Airlines
Deal found 7/27$626
This deal was found by Cheapflights users on 7/29. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/54:05 pmSTL - YOW
1 stop6h 03mAir Canada
Sun 12/79:15 amYOW - STL
1 stop7h 14mAir Canada
Deal found 7/29$637
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/244:05 pmSTL - YQB
1 stop5h 38mAir Canada
Tue 12/210:50 amYQB - STL
1 stop5h 39mAir Canada
Deal found 7/26$659
This United deal was found by Cheapflights users on 7/27. 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.
Sun 11/212:31 pmSTL - YQB
2 stops9h 12mMultiple Airlines
Thu 11/69:15 amYQB - STL
2 stops7h 14mMultiple Airlines
Deal found 7/27$749

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 2,558,603 searches. Data last updated July 29, 2025.
Use the filters below to find and compare flights from St. Louis to Quebec that are best for you.

Fly from

St. Louis

Fly to

Quebec

Route

Depart

Return

Price

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 9/10

6:10 am-4:33 pm

1 stop9h 23m

Montreal Pierre Elliott Trudeau Intl

Wed 9/17

12:31 pm-9:53 pm

1 stop10h 22m

$334

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 9/7

10:35 am-12:27 am

2 stops12h 52m

Montreal Pierre Elliott Trudeau Intl

Fri 11/14

9:25 am-4:35 pm

2 stops8h 10m

$387

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 9/7

1:30 pm-5:00 pm

Nonstop2h 30m

Montreal Pierre Elliott Trudeau Intl

Fri 11/14

11:10 am-3:29 pm

1 stop5h 19m

$511

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 9/2

7:04 pm-5:00 pm

2 stops20h 56m

Montreal Pierre Elliott Trudeau Intl

Sat 9/6

6:15 am-3:44 pm

1 stop10h 29m

$526

St. LouisQuébec City

STL - YQB

STLYQB

Lambert-St Louis

Tue 8/26

4:19 pm-1:44 pm

1 stop20h 25m

Québec City

Tue 9/2

4:14 pm-11:35 am

1 stop20h 21m

$527

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 9/10

10:45 am-9:47 pm

2 stops10h 02m

Montreal Pierre Elliott Trudeau Intl

Wed 9/17

11:00 am-8:34 pm

2 stops10h 34m

$562

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Mon 9/15

9:50 am-12:22 am

3 stops13h 32m

Ottawa

Mon 9/22

3:50 pm-6:36 pm

3 stops27h 46m

$604

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Wed 10/22

5:00 am-2:04 pm

1 stop8h 04m

Ottawa

Fri 10/24

5:25 pm-2:27 pm

1 stop22h 02m

$621

St. LouisQuébec City

STL - YQB

STLYQB

Lambert-St Louis

Tue 8/26

9:17 am-10:10 pm

2 stops11h 53m

Québec City

Tue 9/2

5:20 am-3:44 pm

2 stops11h 24m

$626

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Fri 12/5

4:05 pm-11:08 pm

1 stop6h 03m

Ottawa

Sun 12/7

9:15 am-3:29 pm

1 stop7h 14m

$637

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 22 results
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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, January is the cheapest month in which you can book a flight from St. Louis to Quebec (average of $270). Flying from St. Louis to Quebec in July is currently the most expensive (average of $409). 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 July 29, 2025.

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 July 29, 2025.

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?

Reviews of airlines servicing Quebec

Get insights into the airlines that provide service to Quebec. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Quebec. Reviews last updated July 29, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from St. Louis to Quebec to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,979 reviews
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,826 reviews
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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), located 12.7 mi from the city center, is the airport you fly out of when you book flights from St. Louis to Quebec.

  • What are the cheapest airlines to fly from St. Louis to Quebec one-way?

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $137. Delta flights start at $205 while deals on United Airlines start at $227 one-way.

  • What are the most popular routes from St. Louis to Quebec?

    The most popular flight routes from St. Louis to Quebec are Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl, Lambert-St Louis - Québec City and Lambert-St Louis - Ottawa.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from St. Louis to Quebec on time: United Airlines (53%), Air Canada (51%), Jazz (47%).

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

    On average you can expect to pay $2,044 for a flight from St. Louis to Quebec. The cheapest flight overall is $297 while the most popular route, (Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl) is currently priced at $339.

  • 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, January is the cheapest month in which you can book a flight from St. Louis to Quebec (average of $270). Flying from St. Louis to Quebec in July is currently the most expensive (average of $409). 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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Alternative routes for St. Louis to Quebec

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Pearson Intl flights
Kansas City to Pierre Elliott Trudeau Intl flights
St. Louis to Pierre Elliott Trudeau Intl flights
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Kansas City to Pearson Intl flights
Kansas City to Calgary flights
Kansas City to Vancouver Intl flights
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St. Louis to Québec City flights
Kansas City to Edmonton flights
St. Louis to Edmonton flights
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Kansas City to Victoria flights
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St. Louis to Ottawa flights
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Columbia to Pearson Intl flights
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Kansas City to Winnipeg flights
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Springfield to Toronto Island flights
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Kansas City to Kelowna flights
Joplin to Pearson Intl flights
Columbia to Pierre Elliott Trudeau Intl flights
St. Louis to Grande Prairie flights
St. Louis to Sydney flights
Kansas City to Moncton flights
St. Louis to Saskatoon flights
Joplin to Pierre Elliott Trudeau Intl flights

Top 4 airlines flying from St. Louis to Quebec

Discover the top 4 airlines that operate flights from St. Louis to Quebec. 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 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$211Average$693FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$246Average$709FlexibilityNo cancel feeOn-time69%
DeltaCheapest$255Average$659FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$330Average$617FlexibilityNo cancel feeOn-time71%

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