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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. Find affordable one-way or round-trip flights.

  • One way
  • Round-trip
sortSort by: Lowest Price
  • Sort by: Lowest Price
  • Sort by: Earliest Flight
      • SEA13:57
        2h 44m
        Direct
        ONT16:41
        Seattle - Ontario|Sat, May 18|Frontier Airlines
        US$26US$50
        48% OFF
        48% OFF
        US$50US$26
      • SEA13:57
        2h 44m
        Direct
        ONT16:41
        Seattle - Ontario|Tue, May 21|Frontier Airlines
        US$30US$50
        39% OFF
        39% OFF
        US$50US$30
      • SEA13:53
        2h 37m
        Direct
        ONT16:30
        Seattle - Ontario|Sat, Jun 1|Frontier Airlines
        US$31US$50
        38% OFF
        38% OFF
        US$50US$31
      • SEA13:57
        2h 44m
        Direct
        ONT16:41
        Seattle - Ontario|Wed, May 22|Frontier Airlines
        US$35
        US$35
      • SEA13:57
        2h 44m
        Direct
        ONT16:41
        Seattle - Ontario|Mon, May 20|Frontier Airlines
        US$36
        US$36
      • SEA13:57
        2h 44m
        Direct
        ONT16:41
        Seattle - Ontario|Sat, May 25|Frontier Airlines
        US$39
        US$39
      • SEA13:37
        2h 37m
        Direct
        ONT16:14
        Seattle - Ontario|Wed, Jun 5|Frontier Airlines
        US$39
        US$39
      • SEA13:57
        2h 44m
        Direct
        ONT16:41
        Seattle - Ontario|Tue, Jun 11|Frontier Airlines
        US$39
        US$39
      • SEA14:17
        2h 44m
        Direct
        ONT17:01
        Seattle - Ontario|Fri, May 17|Frontier Airlines
        US$39
        US$39
      • SEA13:22
        2h 37m
        Direct
        ONT15:59
        Seattle - Ontario|Tue, May 28|Frontier Airlines
        US$39
        US$39
      • 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

View airlines operating flights from Seattle-Tacoma International Airport to Ontario. Compare prices and find the airline that meets your travel needs to enjoy a comfortable journey.

Frontier Airlines
From US$26
Spirit Airlines
From US$52
Alaska Airlines
From US$61
Delta Air Lines
From US$65
United Airlines
From US$111
Southwest Airlines
From US$127
American Airlines
From US$131
Hawaiian Airlines
From US$505
ANA airlines
Find more flights and airlines

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

Discover different airports in Ontario. Find the best flight and transfer option, and plan your trip accordingly.

  • 12517.03 km from downtown Ontario
    Ontario International Airport
    Tickets From
    US$26
Flight Schedule from Seattle-Tacoma International Airport to Ontario

Check on the flight schedule from Seattle-Tacoma International Airport to Ontario. Find the flight that matches your travel plan.

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

    14:45

    PHX

    1.2h

    15:58

    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 round-trip ticket price

$60

Cheapest nonstop flight price

$26

Off-season for travel

April

Peak season for travel

September

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