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
Flights from Seattle (SEA) to Ontario (ONT)
Route intelligence for SEA → ONT: direct flights, stopover options, and timetable coverage in one place.
Direct flights
9 direct option(s) across 9 airline(s) · 1,540 km route distance.
- WestJet · 161 min · 1540 km
- Korean Air · 161 min · 1540 km
- Alaska Airlines · 164 min · 1540 km
- Qatar Airways · 164 min · 1540 km
- Delta Air Lines · 165 min · 1540 km
- Virgin Atlantic Airways · 165 min · 1540 km
- KLM Royal Dutch Airlines · 165 min · 1540 km
- Scandinavian Airlines System · 165 min · 1540 km
- Japan Airlines · 167 min · 1540 km
Explore these airlines on this city pair
Open each airline route-map page to compare broader network depth before committing to a nonstop or one-stop strategy.
Stopover options
- 1 stop(s) · 4h 26m · SEA → ONT
- 1 stop(s) · 4h 27m · SEA → ONT
- 1 stop(s) · 4h 27m · SEA → ONT
- 1 stop(s) · 4h 27m · SEA → ONT
- 1 stop(s) · 4h 27m · SEA → ONT
- 1 stop(s) · 4h 27m · SEA → ONT
- 1 stop(s) · 4h 28m · SEA → ONT
- 1 stop(s) · 5h 30m · SEA → ONT
- 1 stop(s) · 5h 31m · SEA → ONT
- 1 stop(s) · 5h 31m · SEA → ONT
- 1 stop(s) · 5h 31m · SEA → ONT
- 1 stop(s) · 5h 32m · SEA → ONT
Timetable coverage
Published flight numbers: AS378, AS529, DL3840, DL3884, DL4031, DL4070, JL6388, KE3070, KL6269, KL6270, QR2043, QR3355, VS5376, VS5470, WS8373
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.
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.