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Cheap flights from St. Louis to Quebec from C$ 160

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 30/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YUL
16 Oct — 23 Oct1
1 adult
1 adult, Economy

Cheap 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 16 September 2025.

Round-trip from

C$ 485

One-way from

C$ 160

Popular in

February

Cheapest in

June

Average price

C$ 956
United Airlines
  • United Airlines
  • 22/10-25/10
  • 3 total stops
  • 19h 40m total
  • St. Louis to Quebec
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American Airlines
  • American Airlines
  • 30/10
  • 1 total stop
  • 22h 21m total
  • St. Louis to Quebec
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 184 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
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Find 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 16 September 2025.

Wed 22/105:00 a.m.STL - YQB
1 stop8h 16mUnited Airlines
Sat 25/105:20 a.m.YQB - STL
2 stops11h 24mUnited Airlines
Deal found 15/9C$ 485
Wed 15/105:00 a.m.STL - YQB
2 stops16h 10mUnited Airlines
Wed 22/104:55 p.m.YQB - STL
2 stops18h 54mUnited Airlines
Deal found 15/9C$ 513
Tue 21/103:23 p.m.STL - YQB
1 stop21h 53mUnited Airlines
Wed 12/112:55 p.m.YQB - STL
1 stop25h 51mUnited Airlines
Deal found 14/9C$ 519
Thu 30/1010:57 a.m.STL - YUL
1 stop27h 13mMultiple Airlines
Thu 6/112:30 p.m.YUL - STL
2 stops24h 27mMultiple Airlines
Deal found 15/9C$ 519
Wed 22/108:42 a.m.STL - YQB
1 stop27h 54mAmerican Airlines
Sat 25/104:14 p.m.YQB - STL
1 stop24h 50mAmerican Airlines
Deal found 14/9C$ 537
Fri 5/129:45 a.m.STL - YUL
1 stop13h 45mMultiple Airlines
Sat 6/125:25 p.m.YUL - STL
2 stops18h 36mMultiple Airlines
Deal found 14/9C$ 558
Thu 30/107:16 a.m.STL - YUL
1 stop8h 23mAmerican Airlines
Thu 6/113:52 p.m.YUL - STL
1 stop9h 04mAmerican Airlines
Deal found 15/9C$ 564
Tue 21/108:04 p.m.STL - YUL
1 stop14h 36mAmerican Airlines
Wed 12/117:30 a.m.YUL - STL
2 stops13h 53mAmerican Airlines
Deal found 14/9C$ 577
Sun 26/1010:57 a.m.STL - YUL
1 stop27h 13mMultiple Airlines
Fri 31/102:30 p.m.YUL - STL
2 stops26h 26mMultiple Airlines
Deal found 15/9C$ 584
Thu 2/1010:35 a.m.STL - YUL
1 stop27h 15mMultiple Airlines
Sat 11/107:20 p.m.YUL - STL
2 stops16h 17mMultiple Airlines
Deal found 13/9C$ 590
Sun 26/1010:57 a.m.STL - YUL
2 stops28h 58mMultiple Airlines
Sun 2/114:35 p.m.YUL - STL
1 stop18h 05mMultiple Airlines
Deal found 15/9C$ 597
Mon 27/109:59 p.m.STL - YUL
2 stops40h 13mMultiple Airlines
Sun 2/114:35 p.m.YUL - STL
1 stop18h 05mMultiple Airlines
Deal found 15/9C$ 619

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 629,999 searches. Data last updated 16 September 2025.
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. LouisQuébec City

STL - YQB

STLYQB

Lambert-St Louis

Wed 22/10

5:00 a.m.-2:16 p.m.

1 stop8h 16m

Québec City

Sat 25/10

5:20 a.m.-3:44 p.m.

2 stops11h 24m

C$ 485

St. LouisQuébec City

STL - YQB

STLYQB

Lambert-St Louis

Wed 15/10

5:00 a.m.-10:10 p.m.

2 stops16h 10m

Québec City

Wed 22/10

4:55 p.m.-10:49 a.m.

2 stops18h 54m

C$ 513

St. LouisQuébec City

STL - YQB

STLYQB

Lambert-St Louis

Tue 21/10

3:23 p.m.-2:16 p.m.

1 stop21h 53m

Québec City

Wed 12/11

2:55 p.m.-3:46 p.m.

1 stop25h 51m

C$ 519

St. LouisQuébec City

STL - YQB

STLYQB

Lambert-St Louis

Wed 22/10

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

1 stop27h 54m

Québec City

Sat 25/10

4:14 p.m.-4:04 p.m.

1 stop24h 50m

C$ 537

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 30/10

7:16 a.m.-4:39 p.m.

1 stop8h 23m

Montreal Pierre Elliott Trudeau Intl

Thu 6/11

3:52 p.m.-11:56 p.m.

1 stop9h 04m

C$ 564

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 21/10

4:34 p.m.-11:40 a.m.

1 stop18h 06m

Montreal Pierre Elliott Trudeau Intl

Wed 12/11

7:30 a.m.-8:23 p.m.

2 stops13h 53m

C$ 577

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 2/10

10:35 a.m.-2:50 p.m.

1 stop27h 15m

Montreal Pierre Elliott Trudeau Intl

Sun 12/10

5:30 p.m.-7:26 p.m.

2 stops26h 56m

C$ 623

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 3/12

5:40 p.m.-3:10 p.m.

1 stop20h 30m

Montreal Pierre Elliott Trudeau Intl

Sun 7/12

3:52 p.m.-8:11 a.m.

1 stop17h 19m

C$ 641

St. LouisQuébec City

STL - YQB

STLYQB

Lambert-St Louis

Mon 24/11

6:43 p.m.-3:58 p.m.

2 stops20h 15m

Québec City

Fri 28/11

5:00 a.m.-7:39 p.m.

2 stops15h 39m

C$ 656

St. LouisQuébec City

STL - YQB

STLYQB

Lambert-St Louis

Fri 10/10

5:28 p.m.-3:40 p.m.

2 stops21h 12m

Québec City

Tue 14/10

4:40 p.m.-10:49 a.m.

2 stops19h 09m

C$ 667

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/9

Showing 1-10 of 28 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, October is the cheapest month in which you can book a flight from St. Louis to Quebec (average of C$ 241). Flying from St. Louis to Quebec in April is currently the most expensive (average of C$ 317). 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 STL to QC?

Find hourly flight availability from St. Louis to Quebec. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 September 2025.

When flying from St. Louis to Quebec, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from St. Louis to Quebec

Explore weekly flight availability from St. Louis to Quebec. 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 16 September 2025.

The most flights from STL to CAQC 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 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) is the airport you will fly out of if you book a flight from St. Louis to Quebec. It is only a 20.4 km journey to Lambert-St Louis (STL) from St. Louis’s city centre.

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

    There are many flights that can get you from St. Louis to Quebec in 8h 16m. Fly via United Airlines or American Airlines to get the fastest option. Airlines will cover a distance of 1782 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most reliable airlines from St. Louis to Quebec?

    No one likes to see their flight delayed. When booking a flight from St. Louis to Quebec consider choosing Sun Country Air (100%), Air Canada (82%) or Jazz (82%) as they are the most reliable in getting you off to your destination on time.

  • 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, October is the cheapest month in which you can book a flight from St. Louis to Quebec (average of C$ 241). Flying from St. Louis to Quebec in April is currently the most expensive (average of C$ 317). 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

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Alternative routes for St. Louis to Quebec

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Fly with Cheapflights

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

Cheapflights helps you search for flights from St. Louis to Quebec via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from St. Louis to Quebec.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from St. Louis to Quebec, users can toggle the no change fees filter when performing a flight search.

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

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

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