Flights from Seattle (SEA) to Ontario (ONT)

Route intelligence for SEA → ONT: direct flights, stopover options, and timetable coverage in one place.

Show route on mapAll flights from SEAAll flights to ONT

Direct flights

No direct flights currently listed. See stopover options below.

Stopover options

  • No stopover itineraries available.

Timetable coverage

Published flight numbers: AS378, AS529, DL3840, DL3884, DL4031, DL4070, JL6388, KE3070, KL6269, KL6270, QR2043, QR3355, VS5376, VS5470, WS8373

Published schedule snapshot may be stale

Flight number: AS 378

Operating days: 1, 2, 3, 4, 5, 6, 7

  • SEA 19:55 → ONT 22:39

Plan this city pair

Compare nearby alternatives and airline networks to decide whether a direct trip, one-stop connection, or reverse search gives you better options.

Explore all departures from SEA →Explore all arrivals to ONT →Compare airline network coverage →Browse airports by country →

Route planning checklist

  • Compare direct duration with one-stop total duration before committing to a fare.
  • Check inbound alternatives on flights to ONT when return timing is important.
  • Use Guides for alliance and hub strategy playbooks.
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