HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$193+ Cheap flights from Quebec to St. Louis (STL)

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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — STL
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Quebec to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 30, 2025.

Round-trip from

$326
(American Airlines)

One-way from

$193
(American Airlines)

Popular in

June

Cheapest in

July

Average price

$286

Good one-way deal

$279 or less
From Quebec to Lambert-St Louis
Search Deals
One-way flight from Quebec to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($55 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals
Price to beat on a one-way flight from Quebec to Lambert-St Louis.
Search Deals

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 July 30, 2025.

This American Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1312:31 pmYUL - STL
1 stop10h 22mAmerican Airlines
Sat 9/202:01 pmSTL - YUL
1 stop20h 45mAmerican Airlines
Deal found 7/30$326
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/86:00 amYUL - STL
1 stop27h 06mDelta
Tue 9/166:40 amSTL - YUL
1 stop4h 20mDelta
Deal found 7/29$408
This Air Canada deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/86:10 pmYUL - STL
Nonstop2h 47mAir Canada
Tue 9/169:15 amSTL - YUL
1 stop6h 05mAir Canada
Deal found 7/29$427
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/88:00 pmYUL - STL
2 stops20h 44mUnited Airlines
Tue 9/165:30 pmSTL - YUL
1 stop17h 27mUnited Airlines
Deal found 7/29$445
This Kiwi.com deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/24:25 pmYOW - STL
1 stop8h 22mMultiple Airlines
Tue 8/55:40 pmSTL - YOW
1 stop22h 26mMultiple Airlines
Deal found 7/29$463
This Mytrip deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/127:00 amYUL - STL
3 stops10h 35mMultiple Airlines
Fri 9/191:00 pmSTL - YUL
3 stops25h 20mMultiple Airlines
Deal found 7/29$481
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/267:29 pmYOW - STL
2 stops16h 17mUnited Airlines
Tue 9/27:04 pmSTL - YOW
2 stops18h 22mUnited Airlines
Deal found 7/29$570
This Air Canada deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/262:25 pmYOW - STL
1 stop6h 35mAir Canada
Tue 9/29:15 amSTL - YOW
1 stop6h 49mAir Canada
Deal found 7/29$611
This FlightHub deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/215:55 amYOW - STL
2 stops8h 25mWestJet
Mon 8/253:42 pmSTL - YOW
2 stops7h 40mWestJet
Deal found 7/29$655

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 2,558,603 searches. Data last updated July 30, 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

Sat 9/13

12:31 pm-9:53 pm

1 stop10h 22m

Lambert-St Louis

Sat 9/20

2:01 pm-11:46 am

1 stop20h 45m

$326

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 9/8

6:00 am-8:06 am

1 stop27h 06m

Lambert-St Louis

Tue 9/16

6:40 am-12:00 pm

1 stop4h 20m

$408

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 9/8

6:10 pm-7:57 pm

Nonstop2h 47m

Lambert-St Louis

Tue 9/16

9:15 am-4:20 pm

1 stop6h 05m

$427

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 9/8

8:00 pm-3:44 pm

2 stops20h 44m

Lambert-St Louis

Tue 9/16

5:30 pm-11:57 am

1 stop17h 27m

$445

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 8/2

4:25 pm-11:47 pm

1 stop8h 22m

Lambert-St Louis

Tue 8/5

5:40 pm-5:06 pm

1 stop22h 26m

$463

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 9/12

7:00 am-4:35 pm

3 stops10h 35m

Lambert-St Louis

Fri 9/19

1:00 pm-3:20 pm

3 stops25h 20m

$481

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Tue 8/26

5:25 pm-3:44 pm

1 stop23h 19m

Lambert-St Louis

Tue 9/2

7:04 pm-5:06 pm

1 stop21h 02m

$555

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Tue 8/26

2:25 pm-8:00 pm

1 stop6h 35m

Lambert-St Louis

Tue 9/2

9:15 am-5:04 pm

1 stop6h 49m

$611

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Thu 8/21

5:55 am-1:20 pm

2 stops8h 25m

Lambert-St Louis

Mon 8/25

3:42 pm-12:22 am

2 stops7h 40m

$655

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 8/2

5:55 am-6:47 pm

2 stops13h 52m

Lambert-St Louis

Fri 8/8

1:29 pm-12:22 am

2 stops9h 53m

$989

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 19 results
1
2

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, August is the cheapest month in which you can book a flight from Quebec to St. Louis (average of $311). Flying from Quebec to St. Louis in March is currently the most expensive (average of $356). 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 July 30, 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 July 30, 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).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated July 30, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Quebec to St. Louis. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
WestJet
7.2
Good
2,975 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air Canada
7.1
Good
9,837 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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?

    Lambert-St Louis (STL) is the airport you will fly into if you book a flight from Quebec to St. Louis. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.

  • What are the cheapest airlines to fly from Quebec to St. Louis one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $193. However, be on the lookout for offers from Iberia and Delta, as they are both options that can get you from Quebec to St. Louis for a low price.

  • 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 Jazz (67%), Air Canada (63%) or United Airlines (62%) 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?

    The cheapest flight price from Quebec to St. Louis is $241. On average you can expect to pay $332. The most popular route, (Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis), can usually be booked for $384.

  • 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, August is the cheapest month in which you can book a flight from Quebec to St. Louis (average of $311). Flying from Quebec to St. Louis in March is currently the most expensive (average of $356). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Festus
Farmington

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Quebec to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to St. Louis flights
Pearson Intl to Kansas City flights
Pierre Elliott Trudeau Intl to Kansas City flights
Pierre Elliott Trudeau Intl to St. Louis flights
Vancouver Intl to St. Louis flights
Calgary to Kansas City flights
Edmonton to Kansas City flights
Halifax to Kansas City flights
Ottawa to Kansas City flights
Vancouver Intl to Springfield flights
Winnipeg to St. Louis flights
Ottawa to St. Louis flights
Winnipeg to Kansas City flights
Pearson Intl to Springfield flights
Edmonton to St. Louis flights
Calgary to St. Louis flights
Vancouver Intl to Kansas City flights
Halifax to St. Louis flights
Kelowna to Kansas City flights
Victoria to St. Louis flights
Pearson Intl to Joplin flights
Saskatoon to Kansas City flights
Charlottetown to St. Louis flights

Top 2 airlines flying from Quebec to St. Louis

Discover the top 2 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 2,558,603 searches. Data last updated July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$433Average$584FlexibilityNo cancel feeOn-time67%
DeltaCheapest$452Average$511FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.