App
Customer Support
CAD
Find Bookings
Trip.com
>
Cheap Flights
>
Canada
>
Quebec
>
Montreal
>
St. Louis to Montreal flight
>
St. Louis Lambert International Airport to Montreal flight
Worldwide Coverage
Worldwide Coverage
Flights to over 5,000 cities
One-stop Service Guarantee
One-stop Service Guarantee
Price guaranteed upon confirmed payment, booking guaranteed once tickets issued
Secure Payment
Secure Payment
Convenient & reliable booking and payment system

Cheap Flights from St. Louis Lambert International Airport to Montreal

Search for flights from St. Louis Lambert International Airport to Montreal and check out affordable one-way and round-trip options.

  • One way
  • Round-trip
      • Cheapest nonstop
        STL13:30
        2h 30m
        Nonstop
        YUL17:00
        St. Louis - Montreal|Fri, May 2|United Airlines
        CAD 367CAD 416
        12% OFF
        12% OFF
        CAD 416CAD 367

        Choose United Airlines flights from St. Louis to Montreal. The one-way direct flight with United Airlines departs from St. Louis Lambert International Airport on Fri, May 2, arriving at Montreal-Trudeau International Airport. One-way Prices start from CAD 367 including taxes and charges.

      • STL13:30
        2h 29m
        Nonstop
        YUL16:59
        St. Louis - Montreal|Mon, May 12|United Airlines
        CAD 370CAD 416
        11% OFF
        11% OFF
        CAD 416CAD 370

        Choose United Airlines flights from St. Louis to Montreal. The one-way direct flight with United Airlines departs from St. Louis Lambert International Airport on Mon, May 12, arriving at Montreal-Trudeau International Airport. One-way Prices start from CAD 370 including taxes and charges.

      • STL16:57
        20h 43m
        1 stop
        YUL14:40
        St. Louis - Montreal|Sat, Apr 5|Frontier Airlines
        CAD 254CAD 416
        39% OFF
        39% OFF
        CAD 416CAD 254

        Choose Frontier Airlines flights from St. Louis to Montreal. The one-way connecting flight with Frontier Airlines departs from St. Louis Lambert International Airport on Sat, Apr 5, arriving at Montreal-Trudeau International Airport. One-way Prices start from CAD 254 including taxes and charges.

      • STL07:29
        25h 41m
        1 stop
        YUL10:10
        St. Louis - Montreal|Thu, Mar 20|American Airlines
        CAD 300
        CAD 300

        Choose American Airlines flights from St. Louis to Montreal. The one-way connecting flight with American Airlines departs from St. Louis Lambert International Airport on Thu, Mar 20, arriving at Montreal-Trudeau International Airport. One-way Prices start from CAD 300 including taxes and charges.

      • STL06:10
        14h 12m
        1 stop
        YUL21:22
        St. Louis - Montreal|Fri, Mar 28|Delta Air Lines
        CAD 305
        CAD 305

        Choose Delta Air Lines flights from St. Louis to Montreal. The one-way connecting flight with Delta Air Lines departs from St. Louis Lambert International Airport on Fri, Mar 28, arriving at Montreal-Trudeau International Airport. One-way Prices start from CAD 305 including taxes and charges.

      • STL06:10
        14h 12m
        1 stop
        YUL21:22
        St. Louis - Montreal|Tue, Mar 18|Delta Air Lines
        CAD 306
        CAD 306

        Choose Delta Air Lines flights from St. Louis to Montreal. The one-way connecting flight with Delta Air Lines departs from St. Louis Lambert International Airport on Tue, Mar 18, arriving at Montreal-Trudeau International Airport. One-way Prices start from CAD 306 including taxes and charges.

      • STL08:30
        12h 36m
        1 stop
        YUL22:06
        St. Louis - Montreal|Sat, Apr 5|Delta Air Lines
        CAD 309
        CAD 309

        Choose Delta Air Lines flights from St. Louis to Montreal. The one-way connecting flight with Delta Air Lines departs from St. Louis Lambert International Airport on Sat, Apr 5, arriving at Montreal-Trudeau International Airport. One-way Prices start from CAD 309 including taxes and charges.

      • STL05:45
        12h 6m
        1 stop
        YUL18:51
        St. Louis - Montreal|Sat, Apr 5|American Airlines
        CAD 310
        CAD 310

        Choose American Airlines flights from St. Louis to Montreal. The one-way connecting flight with American Airlines departs from St. Louis Lambert International Airport on Sat, Apr 5, arriving at Montreal-Trudeau International Airport. One-way Prices start from CAD 310 including taxes and charges.

      • STL06:10
        9h 20m
        1 stop
        YUL16:30
        St. Louis - Montreal|Thu, Apr 3|Delta Air Lines
        CAD 314
        CAD 314

        Choose Delta Air Lines flights from St. Louis to Montreal. The one-way connecting flight with Delta Air Lines departs from St. Louis Lambert International Airport on Thu, Apr 3, arriving at Montreal-Trudeau International Airport. One-way Prices start from CAD 314 including taxes and charges.

      • STL07:33
        10h 43m
        1 stop
        YUL19:16
        St. Louis - Montreal|Mon, Apr 28|American Airlines
        CAD 316
        CAD 316

        Choose American Airlines flights from St. Louis to Montreal. The one-way connecting flight with American Airlines departs from St. Louis Lambert International Airport on Mon, Apr 28, arriving at Montreal-Trudeau International Airport. One-way Prices start from CAD 316 including taxes and charges.

      • STL1:00 PM
        3h 5m
        Nonstop
        YMQ2:00 PM
        St. Louis - Montreal|Tue, Mar 18|United Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Find Suitable Airport in Montreal

Learn about different airports in Montreal, find the best flight and transfer options, and plan your journey.

  • 15.72 km from central Montreal
    Montreal-Trudeau International Airport
    Tickets From
    CAD 236

Flight Schedule from St. Louis Lambert International Airport to Montreal

Check the schedule for flights from St. Louis Lambert International Airport to Montreal and find the flight that best matches your travel plans.

Flight info.
Departure
Arrival
Weekly Schedule

  1. DL4981

    Delta Air Lines

    06:00

    STL

    2.5h

    09:30

    LGA

    SMTWT-S
    Search

  2. DL5197

    Delta Air Lines

    19:45

    LGA

    1.8h

    21:30

    YUL

    SMTWTFS

  3. DL4981

    Delta Air Lines

    06:00

    STL

    2.5h

    09:30

    LGA

    SMTWT-S
    Search

  4. DL5147

    Delta Air Lines

    14:30

    LGA

    1.6h

    16:05

    YUL

    SMTWT-S

  5. AA4606

    American Airlines

    07:29

    STL

    2.4h

    10:51

    LGA

    SMTWT--
    Search

  6. DL5197

    Delta Air Lines

    19:45

    LGA

    1.8h

    21:30

    YUL

    SMTWTFS

  7. UA3425

    United Airlines

    07:30

    STL

    2.5h

    11:02

    EWR

    SMTWTFS
    Search

  8. DL5197

    Delta Air Lines

    19:45

    LGA

    1.8h

    21:30

    YUL

    SMTWTFS

  9. UA3425

    United Airlines

    07:30

    STL

    2.5h

    11:02

    EWR

    SMTWTFS
    Search

  10. UA3715

    United Airlines

    14:41

    EWR

    1.7h

    16:21

    YUL

    SMTWTFS

  11. DL5474

    Delta Air Lines

    09:30

    STL

    2.4h

    12:53

    LGA

    SMTWTFS
    Search

  12. UA3613

    United Airlines

    20:17

    EWR

    1.8h

    22:06

    YUL

    SMTWTFS

  13. UA4432

    United Airlines

    11:20

    STL

    1.5h

    12:52

    ORD

    SMTWTFS
    Search

  14. PD2394

    Porter Airlines

    17:35

    MDW

    1.7h

    20:17

    YTZ

    SMTWT-S

  15. PD2487

    Porter Airlines

    20:55

    YTZ

    1.3h

    22:10

    YUL

    ---WT-S

  16. UA4454

    United Airlines

    13:00

    STL

    2.1h

    16:08

    IAD

    SMTWTFS
    Search

  17. UA3602

    United Airlines

    17:31

    IAD

    2.2h

    19:45

    YUL

    SMTWTFS

  18. AA3096

    American Airlines

    13:59

    STL

    2.0h

    16:57

    CLT

    SMTWTFS
    Search

  19. AA5137

    American Airlines

    20:25

    CLT

    2.4h

    22:50

    YUL

    SMTWTFS

  20. AC8970

    Air Canada

    16:15

    STL

    1.9h

    19:10

    YYZ

    SMTWTFS
    Search

  21. AC430

    Air Canada

    23:10

    YYZ

    1.3h

    00:28

    YUL

    SMTWTFS
Find more flights and airlines

Flight Info of Flights from St. Louis Lambert International Airport to Montreal

Cheapest return ticket priceCAD 706
Cheapest direct flight priceCAD 254
Off-season travel monthMarch
Peak season for travelDecember

FAQs for St. Louis Lambert International Airport to Montreal Flights

Contact Us

About

Other Services

Payment Methods
Our Partners
Copyright © 2025 Trip.com Travel Singapore Pte. Ltd. All rights reserved
Site Operator: Trip.com Travel Singapore Pte. Ltd.