Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Quebec to St. Louis from $191

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Quebec to St. Louis departing on 9/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Quebec to St. Louis

Cheap round-trip flights

American Airlines Logo
12:31 pm - 8:32 pmYUL-STL
9h 01m1 stop
American Airlines Logo
5:25 pm - 11:46 amSTL-YUL
17h 21m1 stop
$324American Airlines
Find Deal
Sat, Sep 20 - Sat, Sep 27
American Airlines Logo
10:34 am - 9:53 pmYUL-STL
12h 19m2 stops
American Airlines Logo
7:23 am - 4:33 pmSTL-YUL
8h 10m1 stop
$334American Airlines
Find Deal
Sat, Sep 20 - Sat, Sep 27
Delta Logo
6:00 am - 2:43 pmYUL-STL
9h 43m1 stop
Delta Logo
7:00 am - 8:04 pmSTL-YUL
12h 04m2 stops
$385Delta
Find Deal
Wed, Sep 3 - Sat, Sep 6
Delta Logo
6:00 am - 4:06 pmYUL-STL
11h 06m2 stops
Delta Logo
7:00 am - 8:04 pmSTL-YUL
12h 04m2 stops
$412Delta
Find Deal
Wed, Sep 3 - Sat, Sep 6
United Airlines Logo
6:20 pm - 10:49 amYUL-STL
17h 29m2 stops
United Airlines Logo
5:00 am - 5:26 pmSTL-YUL
11h 26m1 stop
$444United Airlines
Find Deal
Mon, Oct 20 - Wed, Oct 22
United Airlines Logo
6:20 pm - 2:19 pmYUL-STL
20h 59m2 stops
United Airlines Logo
7:04 pm - 5:00 pmSTL-YUL
20h 56m2 stops
$474United Airlines
Find Deal
Fri, Sep 12 - Mon, Sep 15
Logo
1:10 pm - 9:40 amYUL-STL
21h 30m2 stops
Logo
1:00 pm - 10:15 pmSTL-YUL
32h 15m3 stops
$508
Find Deal
Wed, Sep 3 - Wed, Sep 10
Air Canada Logo
6:10 pm - 7:57 pmYUL-STL
2h 47mnonstop
Air Canada Logo
1:30 pm - 5:00 pmSTL-YUL
2h 30mnonstop
$512Air Canada
Find Deal
Sat, Sep 20 - Sat, Sep 27
Air Canada Logo
6:10 pm - 7:57 pmYUL-STL
2h 47mnonstop
Air Canada Logo
1:30 pm - 5:00 pmSTL-YUL
2h 30mnonstop
$519Air Canada
Find Deal
Thu, Sep 25 - Mon, Sep 29
Logo
6:35 pm - 1:32 pmYUL-STL
19h 57m2 stops
Logo
9:20 am - 10:15 pmSTL-YUL
35h 55m3 stops
$529
Find Deal
Thu, Aug 21 - Mon, Sep 1

United Airlines flights from Quebec to St. Louis

Our best United Airlines deals on Quebec to St. Louis flight tickets
United Airlines
Oct 20
YUL6:20 pmMontreal Pierre Elliott Trudeau Intl
17h 29m
2 stops
STL10:49 amLambert-St Louis
Oct 22
STL5:00 amLambert-St Louis
11h 26m
1 stop
YUL5:26 pmMontreal Pierre Elliott Trudeau Intl
$444
Find similar
United Airlines
Sep 12
YUL6:20 pmMontreal Pierre Elliott Trudeau Intl
20h 59m
2 stops
STL2:19 pmLambert-St Louis
Sep 15
STL7:04 pmLambert-St Louis
20h 56m
2 stops
YUL5:00 pmMontreal Pierre Elliott Trudeau Intl
$474
Find similar
United Airlines
Sep 3
YUL9:45 amMontreal Pierre Elliott Trudeau Intl
9h 38m
1 stop
STL6:23 pmLambert-St Louis
Sep 10
STL9:17 amLambert-St Louis
9h 28m
2 stops
YUL7:45 pmMontreal Pierre Elliott Trudeau Intl
$523
Find similar

American Airlines flights from Quebec to St. Louis

Our best American Airlines deals on Quebec to St. Louis flight tickets
American Airlines
Sep 20
YUL12:31 pmMontreal Pierre Elliott Trudeau Intl
9h 01m
1 stop
STL8:32 pmLambert-St Louis
Sep 27
STL5:25 pmLambert-St Louis
17h 21m
1 stop
YUL11:46 amMontreal Pierre Elliott Trudeau Intl
$324
Find similar
American Airlines
Sep 20
YUL10:34 amMontreal Pierre Elliott Trudeau Intl
12h 19m
2 stops
STL9:53 pmLambert-St Louis
Sep 27
STL7:23 amLambert-St Louis
8h 10m
1 stop
YUL4:33 pmMontreal Pierre Elliott Trudeau Intl
$334
Find similar
American Airlines
Oct 20
YUL5:24 pmMontreal Pierre Elliott Trudeau Intl
15h 45m
1 stop
STL8:09 amLambert-St Louis
Oct 22
STL8:04 pmLambert-St Louis
14h 36m
1 stop
YUL11:40 amMontreal Pierre Elliott Trudeau Intl
$335
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated August 7, 2025.
Use the filters below to find and compare flights from Quebec to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sat 9/20

12:31 pm-8:32 pm

1 stop9h 01m

Lambert-St Louis

Sat 9/27

5:25 pm-11:46 am

1 stop17h 21m

$324

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sat 9/20

10:34 am-9:53 pm

2 stops12h 19m

Lambert-St Louis

Sat 9/27

7:23 am-4:33 pm

1 stop8h 10m

$334

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 9/3

6:00 am-2:43 pm

1 stop9h 43m

Lambert-St Louis

Sat 9/6

7:00 am-8:04 pm

2 stops12h 04m

$385

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 9/3

6:00 am-4:06 pm

2 stops11h 06m

Lambert-St Louis

Sat 9/6

7:00 am-8:04 pm

2 stops12h 04m

$412

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 10/20

6:20 pm-10:49 am

2 stops17h 29m

Lambert-St Louis

Wed 10/22

5:00 am-5:26 pm

1 stop11h 26m

$444

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 9/12

6:20 pm-2:19 pm

2 stops20h 59m

Lambert-St Louis

Mon 9/15

7:04 pm-5:00 pm

2 stops20h 56m

$474

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 9/3

1:10 pm-9:40 am

2 stops21h 30m

Lambert-St Louis

Wed 9/10

1:00 pm-10:15 pm

3 stops32h 15m

$508

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sat 9/20

6:10 pm-7:57 pm

Nonstop2h 47m

Lambert-St Louis

Sat 9/27

1:30 pm-5:00 pm

Nonstop2h 30m

$512

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 9/25

6:10 pm-7:57 pm

Nonstop2h 47m

Lambert-St Louis

Mon 9/29

1:30 pm-5:00 pm

Nonstop2h 30m

$519

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 8/21

6:35 pm-1:32 pm

2 stops19h 57m

Lambert-St Louis

Mon 9/1

9:20 am-10:15 pm

3 stops35h 55m

$529

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to St. Louis from

How to get the cheapest flight ticket from Quebec to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to St. Louis?

In general, July is the cheapest month to fly from Quebec to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $286. The month of August is another great option to travel to St. Louis, with average flight prices from Quebec averaging around $469.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Friday when prices can be found for as low as $256. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around $609. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Quebec in the evening is the least expensive time of day to depart. momondo users have found prices as low as $283 when looking at flights departing in the evening. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $593 per ticket.

What is the cheapest Quebec to Lambert-St Louis flight route?

Fly from Montreal Pierre Elliott Trudeau Intl to Lambert-St Louis for the best Quebec - Lambert-St Louis flight prices

What cabin class options are available on Quebec to Lambert-St Louis flights?

There are 3 cabin classes available to choose from on Quebec to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Quebec to St. Louis flights?

You could potentially save up to 15% on your flight if you consider stops on a Quebec to St. Louis flight.

Cheap Quebec to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Quebec to St. Louis

Best Price Found

$191

Fastest flight time

2h 47m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Quebec in the past 72 hours is $191. The best round-trip flight deal from Quebec to St. Louis found on momondo in the last 72 hours is $324.
The fastest flight from Quebec to St. Louis takes 2h 47m
Direct flights go from Quebec to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
Search flight deals

  • When did momondo last update prices for flights from Quebec to Lambert-St Louis Airport?

    Prices for flights from Quebec to Lambert-St Louis Airport were last updated today.

  • How many operators does momondo search for flights from Quebec to Lambert-St Louis Airport?

  • How old do you have to be to fly from Quebec to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Quebec to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Quebec to St. Louis?

Best airlines flying from Quebec to St. Louis

Compare and see reviews for airlines that fly from Quebec to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $433Free CancellationRating
7.1
9,893 reviews
Search Air Canada flights
DeltaPriceFrom $452Free CancellationRating
8.0
7,985 reviews
Search Delta flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
Maryland Heights
Florissant
Fenton
O'Fallon
Collinsville
Alton
Wentzville
St. Peters
Farmington
Festus
Glencoe
Eureka
Edwardsville
Clayton
Litchfield
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Quebec to St. Louis?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Quebec to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Quebec to St. Louis with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to St. Louis from Quebec with this policy.

How can momondo help me find flights from Quebec to St. Louis?

momondo helps you find the best flight between Quebec and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Quebec to St. Louis right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Quebec to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 8/12
Tue 8/19
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States