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Cheap flights from Quebec to St. Louis from C$ 260

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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — STL
15 Oct — 22 Oct1
1 adult
1 adult, Economy

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 15 September 2025.

Round-trip from

C$ 501

One-way from

C$ 260

Popular in

June

Cheapest in

July

Average price

C$ 774

Good round-trip deal

C$ 1,244 or less

Good one-way deal

C$ 496 or less
American Airlines
  • American Airlines
  • 29/10-5/11
  • 3 total stops
  • 32h 01m total
  • Quebec to St. Louis
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11/10
  • 11/10
  • 1 total stop
  • 19h 12m total
  • Quebec to St. Louis
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Highest demand for flights based on searches. 7% potential increase in price (C$ 87 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 46 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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Price to beat on a one-way 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 15 September 2025.

Wed 29/107:50 a.m.YUL - STL
2 stops11h 30mAmerican Airlines
Wed 5/115:40 p.m.STL - YUL
1 stop20h 31mAmerican Airlines
Deal found 14/9C$ 501
Tue 28/1012:30 p.m.YUL - STL
1 stop8h 56mAmerican Airlines
Tue 4/116:00 a.m.STL - YUL
2 stops15h 39mAmerican Airlines
Deal found 13/9C$ 506
Sat 11/103:50 p.m.YOW - STL
1 stop19h 12mMultiple Airlines
Sat 18/107:15 p.m.STL - YOW
2 stops20h 42mMultiple Airlines
Deal found 14/9C$ 521
Fri 24/1011:55 a.m.YOW - STL
2 stops25h 49mUnited Airlines
Tue 28/101:35 p.m.STL - YOW
2 stops19h 51mUnited Airlines
Deal found 14/9C$ 600
Tue 28/106:15 p.m.YUL - STL
1 stop19h 13mUnited Airlines
Tue 4/1110:00 a.m.STL - YUL
1 stop7h 40mUnited Airlines
Deal found 13/9C$ 622
Sat 8/115:10 p.m.YUL - STL
2 stops18h 02mMultiple Airlines
Sun 16/1112:20 p.m.STL - YUL
1 stop25h 50mMultiple Airlines
Deal found 14/9C$ 623
Wed 5/117:30 p.m.YUL - STL
1 stop13h 43mDelta
Wed 12/119:35 a.m.STL - YUL
1 stop8h 05mDelta
Deal found 14/9C$ 642
Wed 29/106:00 a.m.YUL - STL
1 stop10h 49mUnited Airlines
Wed 5/116:30 a.m.STL - YUL
1 stop8h 27mUnited Airlines
Deal found 14/9C$ 662
Fri 3/104:55 p.m.YQB - STL
2 stops20h 33mUnited Airlines
Mon 13/109:20 a.m.STL - YQB
1 stop27h 56mUnited Airlines
Deal found 15/9C$ 678
Mon 17/113:49 p.m.YUL - STL
1 stop9h 07mAmerican Airlines
Thu 20/116:00 a.m.STL - YUL
1 stop8h 22mAmerican Airlines
Deal found 13/9C$ 696
Fri 3/104:14 p.m.YQB - STL
1 stop24h 10mAmerican Airlines
Mon 13/108:42 a.m.STL - YQB
1 stop27h 54mAmerican Airlines
Deal found 15/9C$ 702
Tue 30/96:00 a.m.YUL - STL
3 stops27h 40mMultiple Airlines
Thu 2/1010:35 a.m.STL - YUL
2 stops12h 52mMultiple Airlines
Deal found 14/9C$ 707

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 15 September 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

Tue 28/10

12:30 p.m.-8:26 p.m.

1 stop8h 56m

Lambert-St Louis

Tue 4/11

6:00 a.m.-10:39 p.m.

2 stops15h 39m

C$ 506

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 29/10

7:50 a.m.-6:20 p.m.

2 stops11h 30m

Lambert-St Louis

Wed 5/11

6:00 a.m.-10:39 p.m.

2 stops15h 39m

C$ 508

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 11/10

3:50 p.m.-10:02 a.m.

1 stop19h 12m

Lambert-St Louis

Sat 18/10

7:15 p.m.-4:57 p.m.

2 stops20h 42m

C$ 521

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 24/10

11:55 a.m.-12:44 p.m.

2 stops25h 49m

Lambert-St Louis

Tue 28/10

1:35 p.m.-10:26 a.m.

2 stops19h 51m

C$ 600

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Tue 28/10

6:15 p.m.-12:28 p.m.

1 stop19h 13m

Lambert-St Louis

Tue 4/11

10:00 a.m.-6:40 p.m.

1 stop7h 40m

C$ 622

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 5/11

7:30 p.m.-8:13 a.m.

1 stop13h 43m

Lambert-St Louis

Wed 12/11

9:35 a.m.-6:40 p.m.

1 stop8h 05m

C$ 642

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 5/11

6:00 a.m.-5:39 p.m.

1 stop12h 39m

Lambert-St Louis

Wed 12/11

6:30 a.m.-9:12 p.m.

2 stops13h 42m

C$ 662

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 29/10

6:00 a.m.-3:49 p.m.

1 stop10h 49m

Lambert-St Louis

Wed 5/11

6:30 a.m.-3:57 p.m.

1 stop8h 27m

C$ 662

Québec CitySt. Louis

YQB - STL

YQBSTL

Québec City

Fri 3/10

4:55 p.m.-12:28 p.m.

2 stops20h 33m

Lambert-St Louis

Mon 13/10

9:20 a.m.-2:16 p.m.

1 stop27h 56m

C$ 678

Québec CitySt. Louis

YQB - STL

YQBSTL

Québec City

Fri 3/10

4:14 p.m.-3:24 p.m.

1 stop24h 10m

Lambert-St Louis

Mon 13/10

8:42 a.m.-1:36 p.m.

1 stop27h 54m

C$ 702

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/9

Showing 1-10 of 26 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, January is the cheapest month in which you can book a flight from Quebec to St. Louis (average of C$ 365). Flying from Quebec to St. Louis in September is currently the most expensive (average of C$ 491). 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 15 September 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 15 September 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?

    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 American Airlines and United Airlines fly from Quebec to St. Louis in about 8h 56m. The time it takes to get you to your destination can typically vary by up to 16h 53m. 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 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 Air Canada (65%), Jazz (65%) or United Airlines (65%) 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?

    On average you can expect to pay C$ 959 for a flight from Quebec to St. Louis. The cheapest flight overall is C$ 496 while the most popular route, (Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis) is currently priced at C$ 594.

  • 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, January is the cheapest month in which you can book a flight from Quebec to St. Louis (average of C$ 365). Flying from Quebec to St. Louis in September is currently the most expensive (average of C$ 491). 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
St. Peters

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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 3 airlines flying from Quebec to St. Louis

Discover the top 3 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 629,999 searches. Data last updated 15 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 542AverageC$ 744FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 592AverageC$ 631FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 740AverageC$ 1,052FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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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