Cheap flights from Ontario to Seattle

Direct flight: 1,540 km, ~1h 49m from Ontario (ONT) to Seattle (SEA).

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Live fares · ONT → SEA

Frequently asked questions

  • How long is the flight from Ontario to Seattle?

    Direct flights from ONT to SEA cover approximately 1,540 km (957 miles), with an estimated flight time of 1h 49m. Operating airlines: AS, DL, F9.

Related guides for this route

Sibling pages — full route detail, airport overviews, visa context, per-airline routes.

Full route page: ONT → SEA Cheapest month to fly to Seattle All flights from Ontario All flights to Seattle Flights to USA Visa-free with USA passport AS routes DL routes F9 routes