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Cheap flights from St. Louis to Quebec from C$ 351

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 21/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YUL
22 Jan — 29 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from St. Louis to Quebec

Enter your travel dates to find the best prices.

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 23 December 2025.

Tue 30/125:59 p.m.STL - YUL
1 stop4h 20mDelta
Thu 8/12:40 p.m.YUL - STL
1 stop9h 45mDelta
Deal found 21/12C$ 1,202
Wed 31/124:53 p.m.STL - YUL
1 stop21h 17mAmerican Airlines
Mon 5/17:08 a.m.YUL - STL
1 stop17h 47mAmerican Airlines
Deal found 20/12C$ 1,331
Sat 27/129:08 a.m.STL - YUL
1 stop5h 02mAmerican Airlines
Wed 31/1212:59 p.m.YUL - STL
1 stop9h 07mAmerican Airlines
Deal found 21/12C$ 1,353
Fri 26/128:01 p.m.STL - YUL
1 stop18h 09mAmerican Airlines
Sun 28/1212:59 p.m.YUL - STL
1 stop9h 12mAmerican Airlines
Deal found 20/12C$ 1,410
Tue 30/127:10 a.m.STL - YUL
2 stops16h 33mWestJet
Thu 8/17:30 p.m.YUL - STL
2 stops23h 20mWestJet
Deal found 22/12C$ 1,465
Fri 26/128:42 p.m.STL - YUL
2 stops26h 48mMultiple Airlines
Fri 2/16:20 p.m.YUL - STL
1 stop6h 22mMultiple Airlines
Deal found 21/12C$ 1,498
Fri 26/125:59 p.m.STL - YUL
1 stop4h 20mDelta
Sun 28/1212:50 p.m.YUL - STL
1 stop8h 51mDelta
Deal found 21/12C$ 1,528
Tue 30/1211:05 a.m.STL - YUL
2 stops7h 43mUnited Airlines
Thu 8/19:15 a.m.YUL - STL
2 stops9h 28mUnited Airlines
Deal found 21/12C$ 1,543

Find 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 23 December 2025.

Round-trip from

C$ 480

One-way from

C$ 351

Popular in

October

Cheapest in

June

Average price

C$ 951
American Airlines
  • American Airlines
  • 19/2-24/2
  • 2 total stops
  • 38h 06m total
  • St. Louis to Quebec
Search Deals
Delta
  • Delta
  • 21/3
  • 1 total stop
  • 17h 56m total
  • St. Louis to Quebec
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 203 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 23 December 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. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 2/2

6:00 a.m.-3:08 p.m.

1 stop8h 08m

Montreal Pierre Elliott Trudeau Intl

Wed 4/2

3:50 p.m.-10:20 a.m.

1 stop19h 30m

C$ 493

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 4/2

6:00 a.m.-3:08 p.m.

1 stop8h 08m

Montreal Pierre Elliott Trudeau Intl

Wed 11/2

3:50 p.m.-9:34 a.m.

1 stop18h 44m

C$ 581

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 26/2

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

1 stop8h 05m

Montreal Pierre Elliott Trudeau Intl

Mon 2/3

3:55 p.m.-9:29 a.m.

1 stop18h 34m

C$ 588

St. LouisQuébec City

STL - YQB

STLYQB

Lambert-St Louis

Tue 3/3

3:49 p.m.-8:15 a.m.

2 stops15h 26m

Québec City

Fri 6/3

6:30 a.m.-11:19 p.m.

1 stop17h 49m

C$ 647

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 19/2

10:04 a.m.-10:59 p.m.

2 stops11h 55m

Montreal Pierre Elliott Trudeau Intl

Tue 24/2

7:12 a.m.-6:11 p.m.

2 stops11h 59m

C$ 681

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 20/1

6:00 a.m.-3:08 p.m.

1 stop8h 08m

Montreal Pierre Elliott Trudeau Intl

Tue 27/1

3:50 p.m.-10:20 a.m.

1 stop19h 30m

C$ 684

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 5/4

3:30 p.m.-12:30 a.m.

1 stop8h 00m

Montreal Pierre Elliott Trudeau Intl

Wed 8/4

4:35 p.m.-9:47 a.m.

2 stops18h 12m

C$ 730

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 18/1

6:44 p.m.-3:08 p.m.

1 stop19h 24m

Montreal Pierre Elliott Trudeau Intl

Sun 25/1

3:50 p.m.-10:20 a.m.

1 stop19h 30m

C$ 739

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 26/2

10:11 p.m.-7:05 a.m.

2 stops31h 54m

Montreal Pierre Elliott Trudeau Intl

Mon 2/3

4:35 p.m.-11:59 p.m.

1 stop8h 24m

C$ 775

St. LouisQuébec City

STL - YQB

STLYQB

Lambert-St Louis

Thu 22/1

5:42 p.m.-2:40 p.m.

1 stop19h 58m

Québec City

Sun 25/1

6:15 a.m.-11:33 p.m.

2 stops18h 18m

C$ 808

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/12

Showing 1-10 of 27 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, January is the cheapest month in which you can book a flight from St. Louis to Quebec (average of C$ 244). Flying from St. Louis to Quebec in November is currently the most expensive (average of C$ 705). 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.

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 6h 23m. Fly via American Airlines or Air Canada 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.

  • 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, January is the cheapest month in which you can book a flight from St. Louis to Quebec (average of C$ 244). Flying from St. Louis to Quebec in November is currently the most expensive (average of C$ 705). 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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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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