App
Customer Support
THB
Search Bookings
Trip.com
>
Flights
>
Flights to Ontario
>
St. Louis to Ontario flight
>
St. Louis Lambert International Airport to Ontario 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 Ontario

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

  • One way
  • Round-trip
sortSort by: Lowest Price
  • Sort by: Lowest Price
  • Sort by: Earliest Flight
      • STL19:23
        16h 6m
        1 stop
        ONT09:29
        St. Louis - Ontario|Tue, Jun 4|Frontier Airlines
        THB 1,721THB 3,607
        52% OFF
        52% OFF
        THB 3,607THB 1,721
      • STL19:29
        13h 34m
        1 stop
        ONT07:03
        St. Louis - Ontario|Wed, Jun 5|Frontier Airlines
        THB 1,762THB 3,607
        51% OFF
        51% OFF
        THB 3,607THB 1,762
      • STL19:23
        15h 41m
        1 stop
        ONT09:04
        St. Louis - Ontario|Mon, Jun 3|Frontier Airlines
        THB 1,843THB 3,607
        49% OFF
        49% OFF
        THB 3,607THB 1,843
      • STL15:47
        10h 12m
        1 stop
        ONT23:59
        St. Louis - Ontario|Tue, Jun 11|Frontier Airlines
        THB 2,133
        THB 2,133
      • STL19:29
        13h 34m
        1 stop
        ONT07:03
        St. Louis - Ontario|Wed, Jun 12|Frontier Airlines
        THB 2,173
        THB 2,173
      • STL17:36
        5h 47m
        Direct
        ONT21:23
        St. Louis - Ontario|Fri, Jun 21|Frontier Airlines
        THB 2,280
        THB 2,280
      • STL17:36
        5h 47m
        Direct
        ONT21:23
        St. Louis - Ontario|Fri, Jun 7|Frontier Airlines
        THB 2,305
        THB 2,305
      • STL19:29
        13h 34m
        1 stop
        ONT07:03
        St. Louis - Ontario|Wed, Jun 26|Frontier Airlines
        THB 2,422
        THB 2,422
      • STL20:22
        5h 37m
        1 stop
        ONT23:59
        St. Louis - Ontario|Mon, Jun 10|Frontier Airlines
        THB 2,589
        THB 2,589
      • STL13:55
        19h 8m
        1 stop
        ONT07:03
        St. Louis - Ontario|Wed, Jun 5|Spirit Airlines
        THB 2,589
        THB 2,589
      • STL13:00
        3h 5m
        Direct
        ONT14:00
        St. Louis - Ontario|Wed, Jun 5|Frontier Airlines
        Find More Flights
        Find More Flights

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

Selected Airlines from St. Louis Lambert International Airport to Ontario

See which airlines fly from St. Louis Lambert International Airport to Ontario. Find the airline that best meets your travel needs by comparing prices and treat yourself to an enjoyable journey.

Frontier Airlines
From THB 1,721
Spirit Airlines
From THB 2,589
American Airlines
From THB 3,508
Delta Air Lines
From THB 4,854
Sun Country Airlines
From THB 5,265
United Airlines
From THB 5,677
Alaska Airlines
From THB 7,022
Southwest Airlines
From THB 7,063
ANA airlines

Find more flights and airlines

There are 1 airport(s) in Ontario. Discover the top routes now!

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

  • 12517.03 km from downtown Ontario
    Ontario International Airport
    Tickets From
    THB 1,721
Flight Schedule from St. Louis Lambert International Airport to Ontario

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

Flight info.
Departure
Arrival
Weekly Schedule

  1. AA2574

    American Airlines

    07:39

    STL

    3.2h

    08:53

    PHX

    SMTWTFS
    Search

  2. F91625

    Frontier Airlines

    15:36

    PHX

    1.2h

    16:50

    ONT

    S-TWTFS

  3. F92017

    Frontier Airlines

    17:38

    STL

    3.5h

    19:10

    LAS

    -M-WT-S
    Search

  4. F94757

    Frontier Airlines

    08:00

    LAS

    1.1h

    09:06

    ONT

    SMTWTFS

  5. F92017

    Frontier Airlines

    17:38

    STL

    3.5h

    19:10

    LAS

    -M-WT-S
    Search

  6. F94205

    Frontier Airlines

    17:00

    LAS

    1.1h

    18:09

    ONT

    SM-W-F-

  7. F93641

    Frontier Airlines

    19:29

    STL

    3.6h

    21:06

    LAS

    SMTW-FS
    Search

  8. F91357

    Frontier Airlines

    11:38

    LAS

    1.1h

    12:47

    ONT

    SMT----

  9. F93641

    Frontier Airlines

    19:29

    STL

    3.6h

    21:06

    LAS

    SMTW-FS
    Search

  10. F91283

    Frontier Airlines

    06:20

    LAS

    1.1h

    07:24

    ONT

    ---W--S

  11. F93641

    Frontier Airlines

    19:29

    STL

    3.6h

    21:06

    LAS

    SMTW-FS
    Search

  12. F94757

    Frontier Airlines

    08:00

    LAS

    1.1h

    09:06

    ONT

    SMTWTFS

  13. F94567

    Frontier Airlines

    20:00

    STL

    2.5h

    21:28

    DEN

    --T-T--
    Search

  14. F91261

    Frontier Airlines

    11:12

    DEN

    2.3h

    12:32

    ONT

    SMTW-FS

  15. F94567

    Frontier Airlines

    20:00

    STL

    2.5h

    21:28

    DEN

    --T-T--
    Search

  16. F92907

    Frontier Airlines

    18:15

    DEN

    2.4h

    19:37

    ONT

    ---WT--

  17. F94567

    Frontier Airlines

    20:00

    STL

    2.5h

    21:28

    DEN

    --T-T--
    Search

  18. F91499

    Frontier Airlines

    22:20

    DEN

    2.3h

    23:39

    ONT

    SMTWTFS

  19. F94477

    Frontier Airlines

    22:32

    STL

    2.5h

    00:01

    DEN

    -M-W--S
    Search

  20. F91499

    Frontier Airlines

    22:20

    DEN

    2.3h

    23:39

    ONT

    SMTWTFS
Find more flights and airlines

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

Cheapest round-trip ticket price

THB 4,534

Cheapest nonstop flight price

THB 1,721

Off-season for travel

October

Peak season for travel

November

Contact Us

About

Other Services

Payment Methods
Our Partners
Copyright © 2024 Trip.com Travel Singapore Pte. Ltd. All rights reserved
Site Operator: Trip.com Travel Singapore Pte. Ltd.