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Cheap flights from Quebec to St. Louis from C$ 238

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 16/5. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — STL
3 May — 10 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Quebec to St. Louis

Enter your travel dates to find the best prices.

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 3 April 2026.

Mon 18/53:00 p.m.
YOW
-
STL
1 stop6h 25m
Air Canada
Sun 24/57:05 a.m.
STL
-
YOW
1 stop5h 00m
Air Canada
Deal found 30/3C$ 369
Sat 16/52:35 p.m.
YOW
-
STL
1 stop6h 50m
Air Canada
Sat 23/57:05 a.m.
STL
-
YOW
1 stop5h 00m
Air Canada
Deal found 1/4C$ 392
Wed 3/610:44 a.m.
YOW
-
STL
1 stop11h 32m
United Airlines
Sat 6/69:23 a.m.
STL
-
YOW
1 stop11h 12m
United Airlines
Deal found 30/3C$ 401
Tue 2/66:00 a.m.
YOW
-
STL
2 stops10h 46m
United Airlines
Fri 5/61:13 p.m.
STL
-
YOW
1 stop7h 22m
United Airlines
Deal found 2/4C$ 402
Wed 3/69:55 a.m.
YOW
-
STL
2 stops6h 51m
Air Canada
Sat 6/61:13 p.m.
STL
-
YOW
1 stop7h 22m
Air Canada
Deal found 30/3C$ 474
Sat 16/512:00 p.m.
YOW
-
STL
2 stops10h 13m
United Airlines
Sat 23/57:05 a.m.
STL
-
YOW
1 stop5h 00m
United Airlines
Deal found 1/4C$ 497
Fri 24/45:00 a.m.
YOW
-
STL
2 stops17h 13m
United Airlines
Wed 29/46:30 a.m.
STL
-
YOW
2 stops6h 57m
United Airlines
Deal found 1/4C$ 537
Thu 14/57:00 a.m.
YOW
-
STL
1 stop6h 06m
Air Canada
Thu 21/57:05 a.m.
STL
-
YOW
1 stop5h 00m
Air Canada
Deal found 29/3C$ 552
Thu 15/104:55 p.m.
YUL
-
STL
Nonstop2h 46m
Air Canada
Mon 19/1012:10 p.m.
STL
-
YUL
Nonstop2h 31m
Air Canada
Deal found 1/4C$ 620
Thu 15/107:00 a.m.
YUL
-
STL
1 stop6h 56m
Delta
Mon 19/101:30 p.m.
STL
-
YUL
1 stop9h 21m
Delta
Deal found 31/3C$ 629
Mon 20/46:45 p.m.
YUL
-
STL
1 stop5h 51m
Delta
Sat 25/45:59 p.m.
STL
-
YUL
1 stop4h 09m
Delta
Deal found 30/3C$ 632
Sun 10/57:45 a.m.
YUL
-
STL
1 stop12h 44m
American Airlines
Sat 16/55:21 p.m.
STL
-
YUL
1 stop17h 23m
American Airlines
Deal found 2/4C$ 647

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 3 April 2026.

Round-trip from

C$ 369

One-way from

C$ 238

Popular in

May

Cheapest in

July

Average price

C$ 698

Good one-way deal

C$ 499 or less
Air Canada
  • Air Canada
  • 18/5-24/5
  • 2 total stops
  • 11h 25m total
  • Quebec to St. Louis
Search Deals
Air Canada
  • Air Canada
  • 16/5
  • 1 total stop
  • 6h 50m total
  • Quebec to St. Louis
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 195 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a one-way flight from Quebec to Lambert-St Louis.
Search Deals

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 629,999 searches. Data last updated 3 April 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

Mon 18/5

3:00 p.m.-8:25 p.m.

1 stop6h 25m

Lambert-St Louis

Sun 24/5

7:05 a.m.-1:05 p.m.

1 stop5h 00m

C$ 369

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 24/4

7:30 p.m.-10:31 a.m.

1 stop16h 01m

Lambert-St Louis

Wed 29/4

11:15 a.m.-5:07 p.m.

1 stop4h 52m

C$ 401

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Wed 3/6

10:44 a.m.-9:16 p.m.

1 stop11h 32m

Lambert-St Louis

Sat 6/6

9:23 a.m.-9:35 p.m.

1 stop11h 12m

C$ 401

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Tue 2/6

5:20 p.m.-9:16 p.m.

1 stop4h 56m

Lambert-St Louis

Fri 5/6

1:13 p.m.-9:35 p.m.

1 stop7h 22m

C$ 402

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Wed 3/6

9:55 a.m.-3:46 p.m.

2 stops6h 51m

Lambert-St Louis

Sat 6/6

1:13 p.m.-9:35 p.m.

1 stop7h 22m

C$ 474
Quickest round-trip

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 20/4

6:45 p.m.-11:36 p.m.

1 stop5h 51m

Lambert-St Louis

Sat 25/4

5:59 p.m.-11:08 p.m.

1 stop4h 09m

C$ 632

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 20/4

6:00 a.m.-9:42 a.m.

1 stop4h 42m

Lambert-St Louis

Tue 28/4

9:59 a.m.-5:40 p.m.

1 stop6h 41m

C$ 655

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 29/4

6:00 a.m.-1:05 p.m.

1 stop8h 05m

Lambert-St Louis

Mon 4/5

5:35 p.m.-11:26 p.m.

1 stop4h 51m

C$ 655

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 27/8

6:00 a.m.-9:30 a.m.

1 stop4h 30m

Lambert-St Louis

Mon 31/8

2:18 p.m.-11:10 p.m.

1 stop7h 52m

C$ 658

Québec CitySt. Louis

YQB - STL

YQBSTL

Québec City

Tue 2/6

4:55 p.m.-11:36 p.m.

1 stop7h 41m

Lambert-St Louis

Sat 6/6

6:00 a.m.-2:08 p.m.

1 stop7h 08m

C$ 664

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/4

Showing 1-10 of 40 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, September is the cheapest month in which you can book a flight from Quebec to St. Louis (average of C$ 467). Flying from Quebec to St. Louis in January is currently the most expensive (average of C$ 890). 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.

How much does it cost to fly round-trip from Quebec to St. Louis?

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?

    Located just 20.4 km from the city centre, Lambert-St Louis (STL) is the airport most travelers will use when flying to St. Louis from Quebec.

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

    Airlines like Air Canada, United Airlines, and Delta fly from Quebec to St. Louis in about 5h 51m. The time it takes to get you to your destination can typically vary by up to 10h 10m. Quebec and St. Louis are separated by a distance of 1556 km. Both multi-stop and direct flights can be found to your destination and back.

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

    Most travellers choose Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis, Ottawa - Lambert-St Louis or Québec City - Lambert-St Louis when deciding on the best route from Quebec to St. Louis.

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

    On average you can expect to pay C$ 499 for a flight from Quebec to St. Louis. The cheapest flight overall is C$ 499 while the most popular route, (Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis) is currently priced at C$ 593.

  • 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, September is the cheapest month in which you can book a flight from Quebec to St. Louis (average of C$ 467). Flying from Quebec to St. Louis in January is currently the most expensive (average of C$ 890). 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

Travelling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Chesterfield

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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 629,999 searches. Data last updated 3 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 603AverageC$ 843FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Quebec to St. Louis?

Cheapflights makes it easy to find Quebec to St. Louis flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Quebec to St. Louis?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Quebec to St. Louis for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Quebec to St. Louis with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Quebec to St. Louis flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Quebec to St. Louis become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to St. Louis from Quebec today and book when prices fit your budget.

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