| Outbound | Return | Airlines | Shop | Baggage | Price | ||
|---|---|---|---|---|---|---|---|
| Seattle-Tacoma Ontario | Outbound 04/12/25 2 Stopovers (DEN, DFW) F93406, F92632, F91405 15h 07min | Return 04/27/25 1 Stopover (DEN) F91500, F93405 23h 45min |  Frontier Airlines |  | ? | $197 | |
| Best option Seattle-Tacoma Ontario | Outbound 04/12/25 direct AS1003 02h 36min | Return 04/27/25 direct AS1091 02h 46min |  Alaska Airlines |  | ? | $266 | |
| Seattle-Tacoma Ontario | Outbound 04/12/25 1 Stopover (DEN) F93406, F91499 07h 37min | Return 04/27/25 direct HA6288 02h 46min | Frontier Airlines |  | $262 | ||
| Seattle-Tacoma Ontario | Outbound 04/12/25 direct AS1003 02h 36min | Return 04/27/25 direct AS1091 02h 46min | Alaska Airlines |  | ? | $271 | |
| Seattle-Tacoma Ontario | Outbound 04/12/25 direct DL4027 02h 43min | Return 04/27/25 direct DL4042 02h 55min |  Delta Air Lines |  | ? | $276 | |
| Seattle-Tacoma Ontario | Outbound 04/12/25 1 Stopover (DEN) F93406, F91261 17h 00min | Return 04/27/25 1 Stopover (DEN) F91500, F93405 23h 45min | Frontier Airlines |  | $288 | ||
| Seattle-Tacoma Ontario | Outbound 04/12/25 1 Stopover (SFO) UA1620, UA0794 04h 48min | Return 04/27/25 1 Stopover (SFO) UA0277, UA1777 09h 58min |  United Airlines |  | ? | $370 |
Tips and tricks to help you find cheap flights from Seattle Tacoma to Ontario
Favorite airline: Frontier Airlines
The majority of passengers on the route Seattle-Tacoma – Ontario prefer to fly with Frontier Airlines.
Frontier Airlines
58 %
Alaska Airlines
26 %
Delta
12 %