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$128+ 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YUL
Mar 7 — Mar 141
Sat 3/7
Sat 3/14
1 adult, Economy
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Cheap 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 February 5, 2026.

This American Airlines deal was found by Cheapflights users on 2/3. 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 4/75:21 pm
STL
-
YUL
1 stop17h 23m
American Airlines
Thu 4/912:30 pm
YUL
-
STL
1 stop12h 16m
American Airlines
Deal found 2/3$342
This American Airlines deal was found by Cheapflights users on 2/4. 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 5/58:03 pm
STL
-
YUL
1 stop14h 41m
American Airlines
Sat 5/91:03 pm
YUL
-
STL
2 stops11h 53m
American Airlines
Deal found 2/4$352
This American Airlines deal was found by Cheapflights users on 2/3. 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 4/175:21 pm
STL
-
YUL
1 stop17h 23m
American Airlines
Tue 4/2112:30 pm
YUL
-
STL
1 stop12h 16m
American Airlines
Deal found 2/3$394
This United Airlines deal was found by Cheapflights users on 2/4. 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 4/227:45 am
STL
-
YUL
1 stop8h 45m
United Airlines
Sun 4/266:30 pm
YUL
-
STL
1 stop27h 38m
United Airlines
Deal found 2/4$396
This Gotogate deal was found by Cheapflights users on 2/2. 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 3/195:00 am
STL
-
YOW
2 stops9h 23m
Air Canada
Thu 3/2610:20 am
YOW
-
STL
1 stop6h 09m
Air Canada
Deal found 2/2$413
This American Airlines deal was found by Cheapflights users on 2/2. 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 4/175:21 pm
STL
-
YUL
1 stop17h 23m
American Airlines
Mon 4/2012:30 pm
YUL
-
STL
1 stop10h 47m
American Airlines
Deal found 2/2$422
This Air Canada deal was found by Cheapflights users on 2/3. 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 9/2512:10 pm
STL
-
YOW
1 stop6h 35m
Air Canada
Mon 9/289:05 am
YOW
-
STL
1 stop10h 36m
Air Canada
Deal found 2/3$443
This Air Canada deal was found by Cheapflights users on 2/3. 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.
Sat 9/268:55 am
STL
-
YOW
1 stop5h 15m
Air Canada
Mon 9/286:00 am
YOW
-
STL
1 stop13h 41m
Air Canada
Deal found 2/3$448
This American Airlines deal was found by Cheapflights users on 2/3. 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 4/212:33 pm
STL
-
YUL
1 stop20h 11m
American Airlines
Fri 4/247:29 am
YUL
-
STL
1 stop11h 35m
American Airlines
Deal found 2/3$455
This United Airlines deal was found by Cheapflights users on 2/2. 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 3/195:00 am
STL
-
YOW
1 stop4h 26m
United Airlines
Thu 3/265:11 pm
YOW
-
STL
1 stop6h 48m
United Airlines
Deal found 2/2$466
This Air Canada deal was found by Cheapflights users on 2/3. 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.
Thu 9/248:55 am
STL
-
YOW
1 stop14h 50m
Air Canada
Mon 9/289:05 am
YOW
-
STL
1 stop10h 36m
Air Canada
Deal found 2/3$472
This American Airlines deal was found by Cheapflights users on 2/2. 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 4/37:05 am
STL
-
YUL
1 stop14h 43m
American Airlines
Mon 4/63:45 pm
YUL
-
STL
1 stop17h 41m
American Airlines
Deal found 2/2$482

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 February 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$342
(American Airlines)

One-way from

$128
(American Airlines)

Popular in

October

Cheapest in

June

Good round-trip deal

$738 or less

Good one-way deal

$299 or less
Provider with most accurate pricing for Lambert-St Louis-Montreal (YMQ) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Montreal (YMQ) flights.
Search Deals
From Lambert-St Louis to Quebec
Search Deals
One-way flight from Lambert-St Louis to Quebec
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($105 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Price to beat on a round-trip flight from Lambert-St Louis to Quebec.
Search Deals
Price to beat on a one-way flight from Lambert-St Louis to Quebec.
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 2,558,603 searches. Data last updated February 5, 2026.
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

Tue 4/21

5:21 pm-11:44 am

1 stop17h 23m

Montreal Pierre Elliott Trudeau Intl

Thu 4/23

12:30 pm-11:46 pm

1 stop12h 16m

$342

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 4/7

5:21 pm-11:44 am

1 stop17h 23m

Montreal Pierre Elliott Trudeau Intl

Thu 4/9

12:30 pm-11:46 pm

1 stop12h 16m

$342

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 5/5

8:03 pm-11:44 am

1 stop14h 41m

Montreal Pierre Elliott Trudeau Intl

Sat 5/9

12:30 pm-11:56 pm

1 stop12h 26m

$342

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 4/17

5:21 pm-11:44 am

1 stop17h 23m

Montreal Pierre Elliott Trudeau Intl

Tue 4/21

12:30 pm-11:46 pm

1 stop12h 16m

$394

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 4/22

7:45 am-5:30 pm

1 stop8h 45m

Montreal Pierre Elliott Trudeau Intl

Sun 4/26

6:30 pm-9:08 pm

1 stop27h 38m

$396

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Thu 3/19

5:00 am-3:23 pm

2 stops9h 23m

Ottawa

Thu 3/26

10:20 am-3:29 pm

1 stop6h 09m

$413

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 4/17

5:21 pm-11:44 am

1 stop17h 23m

Montreal Pierre Elliott Trudeau Intl

Mon 4/20

12:30 pm-10:17 pm

1 stop10h 47m

$422

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 4/22

8:03 pm-11:44 am

1 stop14h 41m

Montreal Pierre Elliott Trudeau Intl

Fri 4/24

7:45 am-7:29 pm

1 stop12h 44m

$455

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Thu 3/19

5:00 am-10:26 am

1 stop4h 26m

Ottawa

Thu 3/26

5:11 pm-10:59 pm

1 stop6h 48m

$466

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 4/3

7:05 am-10:48 pm

1 stop14h 43m

Montreal Pierre Elliott Trudeau Intl

Mon 4/6

3:45 pm-8:26 am

1 stop17h 41m

$482

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

Showing 1-10 of 40 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, June is the cheapest month in which you can book a flight from St. Louis to Quebec (average of $190). Flying from St. Louis to Quebec in January is currently the most expensive (average of $646). 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.

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 February 5, 2026.
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
7.9
Good
8,151 reviews

Overall

7.9

Comfort

7.9

Entertainment

7.8

Food

7.2

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,151 reviews
Delta
7.9
Good
8,151 reviews

Overall

7.9

Comfort

7.9

Entertainment

7.8

Food

7.2

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,240 reviews
Delta
7.9
Good
8,151 reviews

Overall

7.9

Comfort

7.9

Entertainment

7.8

Food

7.2

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,237 reviews
Delta
7.9
Good
8,151 reviews

Overall

7.9

Comfort

7.9

Entertainment

7.8

Food

7.2

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air Canada
7.1
Good
10,694 reviews
Delta
7.9
Good
8,151 reviews

Overall

7.9

Comfort

7.9

Entertainment

7.8

Food

7.2

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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.

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

    American Airlines, Air Canada, and United Airlines can get you from St. Louis to Quebec in just under 4h 26m. Your travel time can differ by up to 12h 57m. The distance between St. Louis and Quebec 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 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 $167. Air Canada flights start at $182 while deals on Delta start at $197 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 cheapest flights from St. Louis to Quebec?

    On average you can expect to pay $1,401 for a flight from St. Louis to Quebec. The cheapest flight overall is $233 while the most popular route, (Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl) is currently priced at $396.

  • 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, June is the cheapest month in which you can book a flight from St. Louis to Quebec (average of $190). Flying from St. Louis to Quebec in January is currently the most expensive (average of $646). 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

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 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 February 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$193Average$734FlexibilityNo cancel feeOn-time67%
DeltaCheapest$212Average$634FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$246Average$676FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$348Average$683FlexibilityNo cancel feeOn-time71%

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