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Cheap flights from Quebec to St. Louis from C$ 337

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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — STL
27 Aug — 3 Sep1
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 28 July 2026.

Wed 2/912:30 p.m.
YUL
-
STL
1 stop12h 44m
American Airlines
Wed 9/97:26 a.m.
STL
-
YUL
2 stops13h 16m
American Airlines
Deal found 27/7C$ 590
Thu 15/1012:30 p.m.
YUL
-
STL
1 stop9h 38m
American Airlines
Mon 19/105:27 p.m.
STL
-
YUL
1 stop17h 17m
American Airlines
Deal found 28/7C$ 613
Fri 2/105:34 p.m.
YUL
-
STL
1 stop17h 46m
American Airlines
Wed 14/105:00 a.m.
STL
-
YUL
1 stop10h 52m
American Airlines
Deal found 25/7C$ 629
Fri 14/89:00 a.m.
YOW
-
STL
1 stop6h 04m
Air Canada
Sat 22/812:10 p.m.
STL
-
YOW
1 stop6h 35m
Air Canada
Deal found 24/7C$ 659
Fri 21/84:00 p.m.
YOW
-
STL
1 stop5h 24m
Air Canada
Fri 28/88:55 a.m.
STL
-
YOW
1 stop5h 15m
Air Canada
Deal found 24/7C$ 666
Sat 19/91:15 p.m.
YUL
-
STL
1 stop10h 44m
United Airlines
Mon 21/95:30 p.m.
STL
-
YUL
1 stop16h 10m
United Airlines
Deal found 23/7C$ 695
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 26/7C$ 705
Wed 2/98:40 a.m.
YUL
-
STL
1 stop24h 59m
United Airlines
Wed 9/98:00 a.m.
STL
-
YUL
1 stop10h 01m
United Airlines
Deal found 27/7C$ 709
Thu 27/81:15 p.m.
YUL
-
STL
1 stop9h 45m
United Airlines
Mon 31/86:54 p.m.
STL
-
YUL
1 stop21h 36m
United Airlines
Deal found 23/7C$ 712
Sat 19/96:00 a.m.
YOW
-
STL
1 stop4h 39m
United Airlines
Wed 23/910:53 a.m.
STL
-
YOW
1 stop5h 23m
United Airlines
Deal found 27/7C$ 733
Fri 21/86:00 a.m.
YOW
-
STL
3 stops10h 38m
United Airlines
Fri 28/812:59 p.m.
STL
-
YOW
2 stops8h 36m
United Airlines
Deal found 24/7C$ 735
Thu 10/92:27 p.m.
YQB
-
STL
1 stop11h 00m
American Airlines
Thu 17/96:30 a.m.
STL
-
YQB
1 stop7h 48m
American Airlines
Deal found 27/7C$ 759

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 28 July 2026.

Round-trip from

C$ 590

One-way from

C$ 337

Popular in

September

Cheapest in

June

Average price

C$ 778
American Airlines
  • American Airlines
  • 2/9-9/9
  • 3 total stops
  • 26h 00m total
  • Quebec to St. Louis
Search Deals
American Airlines
  • American Airlines
  • 10/9
  • 1 total stop
  • 9h 13m total
  • Quebec to St. Louis
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 227 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 55 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
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 28 July 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 14/8

9:00 a.m.-2:04 p.m.

1 stop6h 04m

Lambert-St Louis

Sat 22/8

12:10 p.m.-7:45 p.m.

1 stop6h 35m

C$ 659

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sat 19/9

1:15 p.m.-10:59 p.m.

1 stop10h 44m

Lambert-St Louis

Mon 21/9

5:30 p.m.-10:40 a.m.

1 stop16h 10m

C$ 695
Quickest round-trip

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 15/10

4:55 p.m.-6:41 p.m.

Nonstop2h 46m

Lambert-St Louis

Mon 19/10

12:10 p.m.-3:41 p.m.

Nonstop2h 31m

C$ 705

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 2/9

6:30 p.m.-2:57 p.m.

1 stop21h 27m

Lambert-St Louis

Wed 9/9

8:30 a.m.-7:01 p.m.

1 stop9h 31m

C$ 709

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 27/8

1:15 p.m.-10:00 p.m.

1 stop9h 45m

Lambert-St Louis

Mon 31/8

6:54 p.m.-5:30 p.m.

1 stop21h 36m

C$ 712

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 19/9

6:00 a.m.-3:38 p.m.

3 stops10h 38m

Lambert-St Louis

Wed 23/9

10:53 a.m.-5:16 p.m.

1 stop5h 23m

C$ 733

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 21/8

6:00 a.m.-3:38 p.m.

3 stops10h 38m

Lambert-St Louis

Fri 28/8

12:59 p.m.-10:35 p.m.

2 stops8h 36m

C$ 735

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 14/8

6:05 a.m.-11:17 a.m.

1 stop6h 12m

Lambert-St Louis

Sat 22/8

7:25 a.m.-6:55 p.m.

2 stops10h 30m

C$ 735

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 2/10

6:30 p.m.-7:41 p.m.

1 stop26h 11m

Lambert-St Louis

Wed 14/10

8:00 a.m.-9:55 p.m.

2 stops12h 55m

C$ 739

Québec CitySt. Louis

YQB - STL

YQBSTL

Québec City

Tue 25/8

4:55 p.m.-11:38 p.m.

1 stop7h 43m

Lambert-St Louis

Sat 29/8

6:00 a.m.-3:25 p.m.

2 stops8h 25m

C$ 776

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/7

Showing 1-10 of 30 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 C$ 773). Flying from Quebec to St. Louis in December is currently the most expensive (average of C$ 1,132). 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 28 July 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 28 July 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 C$ 623 and C$ 1,113 in September.
The cheapest round-trip price found within the last 5 days was C$ 590 on American Airlines (2 Sep-9 Sep).

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 and United Airlines fly from Quebec to St. Louis in about 6h 04m. The time it takes to get you to your destination can typically vary by up to 4h 40m. Quebec and St. Louis are separated by a distance of 1413 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 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.

  • 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 C$ 773). Flying from Quebec to St. Louis in December is currently the most expensive (average of C$ 1,132). 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
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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 28 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 569AverageC$ 776FlexibilityNo 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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