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

4 direct option(s) across 4 airline(s).

  • Delta Air Lines · 0 min · 0 km
  • Frontier Airlines · 0 min · 0 km
  • American Airlines · 143 min · 1540 km
  • Alaska Airlines · 143 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.

Delta Air Lines route map →Frontier Airlines route map →American Airlines route map →Alaska Airlines route map →

Stopover options

  • 1 stop(s) · 4h 5m · SEA → ONT
  • 1 stop(s) · 4h 5m · SEA → ONT
  • 1 stop(s) · 4h 5m · SEA → ONT
  • 1 stop(s) · 4h 5m · SEA → ONT
  • 1 stop(s) · 4h 8m · SEA → ONT
  • 1 stop(s) · 4h 8m · SEA → ONT
  • 1 stop(s) · 4h 8m · SEA → ONT
  • 1 stop(s) · 4h 12m · SEA → ONT
  • 1 stop(s) · 4h 12m · SEA → ONT
  • 1 stop(s) · 4h 12m · SEA → ONT
  • 1 stop(s) · 4h 13m · SEA → ONT
  • 1 stop(s) · 4h 13m · SEA → ONT

Timetable coverage

Published flight numbers: DL4070, DL3840, DL4031, KE3070, KL6270, VS5376, WS8373, AS529, JL6388, QR3355, DL3884, KE3106, KL6269, SK3259, VS5470, WS7896, WS7898, AS467, QR3354

Flight number: DL 4070

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

  • SEA 08:25 → ONT 11:14

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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