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Seattle-Tacoma International Airport to Ontario flight
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Cheap Flights from Seattle-Tacoma International Airport to Ontario

Search for flights from Seattle-Tacoma International Airport to Ontario and check out affordable one-way and round-trip options.

  • One way
  • Round-trip
sortSort: Price (Lowest)
  • Sort: Price (Lowest)
  • Sort: Departure (Earliest)
      • SEA13:57
        2h 44m
        Direct
        ONT16:41
        Seattle - Ontario|Sat, May 18|Frontier Airlines
        CAD 36CAD 68
        48% OFF
        48% OFF
        CAD 68CAD 36
      • SEA13:57
        2h 44m
        Direct
        ONT16:41
        Seattle - Ontario|Tue, May 21|Frontier Airlines
        CAD 41CAD 68
        39% OFF
        39% OFF
        CAD 68CAD 41
      • SEA13:53
        2h 37m
        Direct
        ONT16:30
        Seattle - Ontario|Sat, Jun 1|Frontier Airlines
        CAD 42CAD 68
        38% OFF
        38% OFF
        CAD 68CAD 42
      • SEA13:57
        2h 44m
        Direct
        ONT16:41
        Seattle - Ontario|Wed, May 22|Frontier Airlines
        CAD 48
        CAD 48
      • SEA13:57
        2h 44m
        Direct
        ONT16:41
        Seattle - Ontario|Mon, May 20|Frontier Airlines
        CAD 49
        CAD 49
      • SEA13:57
        2h 44m
        Direct
        ONT16:41
        Seattle - Ontario|Sat, May 25|Frontier Airlines
        CAD 53
        CAD 53
      • SEA13:37
        2h 37m
        Direct
        ONT16:14
        Seattle - Ontario|Wed, Jun 5|Frontier Airlines
        CAD 53
        CAD 53
      • SEA13:57
        2h 44m
        Direct
        ONT16:41
        Seattle - Ontario|Tue, Jun 11|Frontier Airlines
        CAD 54
        CAD 54
      • SEA14:17
        2h 44m
        Direct
        ONT17:01
        Seattle - Ontario|Fri, May 17|Frontier Airlines
        CAD 54
        CAD 54
      • SEA13:22
        2h 37m
        Direct
        ONT15:59
        Seattle - Ontario|Tue, May 28|Frontier Airlines
        CAD 54
        CAD 54
      • SEA13:00
        3h 5m
        Direct
        ONT14:00
        Seattle - Ontario|Sat, May 4|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 Seattle-Tacoma International Airport to Ontario

See which airlines fly from Seattle-Tacoma 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 CAD 36
Spirit Airlines
From CAD 71
Alaska Airlines
From CAD 83
Delta Air Lines
From CAD 89
United Airlines
From CAD 151
Southwest Airlines
From CAD 174
American Airlines
From CAD 179
Hawaiian Airlines
From CAD 690
ANA airlines
Find more flights and airlines

Find Suitable Airport in Ontario

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

  • 12517.03 km from central Ontario
    Ontario International Airport
    Tickets From
    CAD 36
Flight Schedule from Seattle-Tacoma International Airport to Ontario

Check the schedule for flights from Seattle-Tacoma International Airport to Ontario and find the flight that best matches your travel plans.

Flight info.
Departure
Arrival
Weekly Schedule

  1. AS1254

    Alaska Airlines

    06:30

    SEA

    2.6h

    Direct

    09:05

    ONT

    S-TWTFS
    Search

  2. F91312

    Frontier Airlines

    10:06

    SEA

    3.1h

    13:10

    PHX

    SMT-TFS
    Search

  3. F91625

    Frontier Airlines

    20:50

    PHX

    1.3h

    22:09

    ONT

    SMTWT-S

  4. F91312

    Frontier Airlines

    10:06

    SEA

    3.1h

    13:10

    PHX

    SMT-TFS
    Search

  5. F92097

    Frontier Airlines

    15:40

    PHX

    1.3h

    16:59

    ONT

    -----F-

  6. F94668

    Frontier Airlines

    17:49

    SEA

    2.3h

    20:07

    LAS

    S--WT--
    Search

  7. F91283

    Frontier Airlines

    06:00

    LAS

    1.1h

    07:03

    ONT

    SMTWT-S

  8. AS1088

    Alaska Airlines

    18:55

    SEA

    2.5h

    Direct

    21:28

    ONT

    -MT--F-
    Search

  9. F92150

    Frontier Airlines

    21:35

    SEA

    2.8h

    01:25

    DEN

    -M-----
    Search

  10. F91261

    Frontier Airlines

    05:06

    DEN

    2.4h

    06:31

    ONT

    SMTWTFS

  11. F92146

    Frontier Airlines

    23:14

    SEA

    2.8h

    03:01

    DEN

    --TWTFS
    Search

  12. F91261

    Frontier Airlines

    05:06

    DEN

    2.4h

    06:31

    ONT

    SMTWTFS
Find more flights and airlines

Flight Info of Flights from Seattle-Tacoma International Airport to Ontario

Cheapest return ticket price

CAD 82

Cheapest direct flight price

CAD 35

Cheapest month

April

Peak season for travel

September

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