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Cheap flights from Quebec to St. Louis from C$ 248

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 15/12. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — STL
4 Dec — 11 Dec1
1 adult
1 adult, Economy, 0 bags

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 4 November 2025.

Round-trip from

C$ 361

One-way from

C$ 248

Popular in

June

Cheapest in

July

Average price

C$ 917

Good one-way deal

C$ 504 or less
16/1-25/1
  • 16/1-25/1
  • 2 total stops
  • 37h 09m total
  • Quebec to St. Louis
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United Airlines
  • United Airlines
  • 15/12
  • 2 total stops
  • 17h 45m total
  • Quebec to St. Louis
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Highest demand for flights based on searches. 4% potential increase in price (C$ 49 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 44 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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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

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 4 November 2025.

Thu 4/128:00 a.m.YUL - STL
2 stops26h 47mMultiple Airlines
Sun 7/129:54 a.m.STL - YUL
1 stop13h 36mMultiple Airlines
Deal found 4/11C$ 493
Thu 4/128:00 a.m.YUL - STL
2 stops15h 33mMultiple Airlines
Thu 11/122:47 p.m.STL - YUL
1 stop24h 36mMultiple Airlines
Deal found 4/11C$ 563
Sun 28/124:35 p.m.YUL - STL
1 stop18h 10mMultiple Airlines
Mon 5/14:27 p.m.STL - YUL
2 stops23h 28mMultiple Airlines
Deal found 4/11C$ 611
Fri 5/128:00 a.m.YUL - STL
2 stops15h 33mMultiple Airlines
Sun 7/129:54 a.m.STL - YUL
1 stop13h 36mMultiple Airlines
Deal found 3/11C$ 615
Sat 20/125:09 p.m.YOW - STL
1 stop5h 34mUnited Airlines
Mon 5/18:15 a.m.STL - YOW
1 stop14h 39mUnited Airlines
Deal found 4/11C$ 647
Thu 4/122:37 p.m.YUL - STL
1 stop18h 43mDelta
Sun 7/126:05 a.m.STL - YUL
1 stop25h 40mDelta
Deal found 4/11C$ 657
Sat 20/125:40 a.m.YOW - STL
2 stops17h 53mMultiple Airlines
Mon 5/14:27 p.m.STL - YOW
1 stop30h 31mMultiple Airlines
Deal found 4/11C$ 696
Thu 4/127:00 a.m.YUL - STL
1 stop10h 06mDelta
Thu 11/129:30 a.m.STL - YUL
1 stop6h 55mDelta
Deal found 4/11C$ 715
Thu 25/127:08 a.m.YUL - STL
1 stop13h 22mAmerican Airlines
Thu 1/15:30 a.m.STL - YUL
1 stop5h 50mAmerican Airlines
Deal found 3/11C$ 727
Thu 25/127:00 a.m.YUL - STL
2 stops13h 18mUnited Airlines
Thu 1/19:55 a.m.STL - YUL
1 stop7h 45mUnited Airlines
Deal found 3/11C$ 755
Fri 5/123:00 p.m.YUL - STL
2 stops8h 45mUnited Airlines
Sun 7/126:30 a.m.STL - YUL
2 stops7h 46mUnited Airlines
Deal found 3/11C$ 769
Fri 19/1210:10 a.m.YUL - STL
1 stop6h 19mAir Canada
Sat 3/14:05 p.m.STL - YUL
1 stop6h 47mAir Canada
Deal found 4/11C$ 778

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 4 November 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

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 16/1

9:30 a.m.-10:37 p.m.

1 stop14h 07m

Lambert-St Louis

Sun 25/1

5:11 p.m.-5:13 p.m.

1 stop23h 02m

C$ 361

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 23/1

5:11 p.m.-10:58 p.m.

1 stop6h 47m

Lambert-St Louis

Sun 25/1

6:30 a.m.-9:18 p.m.

1 stop13h 48m

C$ 421

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 16/1

5:55 p.m.-11:59 p.m.

1 stop7h 04m

Lambert-St Louis

Sun 25/1

6:30 a.m.-4:30 p.m.

2 stops9h 00m

C$ 421

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 4/12

8:00 a.m.-9:47 a.m.

2 stops26h 47m

Lambert-St Louis

Sun 7/12

9:54 a.m.-12:30 a.m.

1 stop13h 36m

C$ 493

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 23/1

2:50 p.m.-10:58 p.m.

2 stops9h 08m

Lambert-St Louis

Sun 25/1

6:30 a.m.-5:42 p.m.

2 stops10h 12m

C$ 494

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Tue 7/4

12:30 p.m.-9:48 p.m.

1 stop10h 18m

Lambert-St Louis

Wed 8/4

11:14 a.m.-11:15 a.m.

1 stop23h 01m

C$ 522

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Tue 17/2

3:55 p.m.-9:28 a.m.

1 stop18h 33m

Lambert-St Louis

Wed 25/2

6:00 a.m.-3:05 p.m.

1 stop8h 05m

C$ 578

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 20/12

5:09 p.m.-9:43 p.m.

1 stop5h 34m

Lambert-St Louis

Mon 5/1

8:15 a.m.-11:54 p.m.

1 stop14h 39m

C$ 647

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 4/12

2:37 p.m.-8:20 a.m.

1 stop18h 43m

Lambert-St Louis

Sun 7/12

6:05 a.m.-8:45 a.m.

1 stop25h 40m

C$ 657

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 4/12

7:00 a.m.-4:06 p.m.

1 stop10h 06m

Lambert-St Louis

Thu 11/12

9:30 a.m.-5:25 p.m.

1 stop6h 55m

C$ 715

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 38 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, March is the cheapest month in which you can book a flight from Quebec to St. Louis (average of C$ 550). Flying from Quebec to St. Louis in August is currently the most expensive (average of C$ 817). 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 4 November 2025.

One of the essential ways to save on airfare from Quebec to St. Louis is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 28% on airfare.

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 United Airlines, American Airlines, and Delta fly from Quebec to St. Louis in about 6h 47m. The time it takes to get you to your destination can typically vary by up to 11h 56m. 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 cheapest airlines to fly from Quebec to St. Louis one-way?

    C$ 248 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Air Canada and Delta, with prices starting from C$ 250 and C$ 331, respectively.

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

    Most travellers choose Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis, Québec City - Lambert-St Louis or Ottawa - 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 Sun Country Air (100%), Air Canada (70%) or Jazz (70%) 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$ 504 for a flight from Quebec to St. Louis. The cheapest flight overall is C$ 504 while the most popular route, (Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis) is currently priced at C$ 615.

  • 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, March is the cheapest month in which you can book a flight from Quebec to St. Louis (average of C$ 550). Flying from Quebec to St. Louis in August is currently the most expensive (average of C$ 817). 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 4 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 550AverageC$ 756FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 602AverageC$ 641FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 752AverageC$ 1,037FlexibilityNo 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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