Direct flights from Ontario to Seattle (ONT → SEA)

Distance 1,540 km (957 mi)
Est. duration 1h 49m
ONT
Ontario
Ontario International Airport, USA
SEA
Seattle
Seattle Tacoma International, USA
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Live fares · ONT → SEA

Available flights

Frontier AirlinesNon-stop
from$159
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Frequently asked questions

How far is the flight from Ontario to Seattle? The flight distance from ONT to SEA is approximately 1,540 km (957 miles).
How long is the flight from ONT to SEA? The estimated flight time from Ontario to Seattle is approximately 1h 49m.
What airlines fly from ONT to SEA? Airlines operating direct flights from Ontario to Seattle include: AS, DL, F9.

Cheapest fares Ontario → Seattle

Ontario ONT
Seattle SEA
May from $154 June from $179 July — August — September — October —

Related guides for this route

Sibling pages from across Flightmaps — fares, visa rules, country aggregations, and per-airline routes for Ontario → Seattle.

Cheap flights from Ontario to Seattle Cheapest month to fly to Seattle Flights from USA Flights to USA Visa-free with USA passport All airports in USA AS routes & destinations All routes by this carrier DL routes & destinations All routes by this carrier F9 routes & destinations All routes by this carrier

Try a nearby airport to Ontario

Flights to Seattle (SEA) from other airports within 350 km of Ontario. Often unlocks cheaper fares or better times.

SNA → SEA 48 km from ONT Santa Ana → Seattle USA · 48 destinations LGB → SEA 57 km from ONT Long Beach → Seattle USA · 18 destinations BUR → SEA 71 km from ONT Burbank → Seattle USA · 31 destinations LAX → SEA 75 km from ONT Los Angeles → Seattle USA · 181 destinations VNY → SEA 84 km from ONT Los Angeles → Seattle USA · 9 destinations

Or try a nearby airport to Seattle

Flights from Ontario (ONT) to other airports within 350 km of Seattle.

ONT → PAE 52 km from SEA Ontario → Everett USA · 9 destinations ONT → BLI 151 km from SEA Ontario → Bellingham USA · 7 destinations ONT → YYJ 157 km from SEA Ontario → Victoria Canada · 15 destinations ONT → YVR 205 km from SEA Ontario → Vancouver Canada · 123 destinations ONT → PDX 207 km from SEA Ontario → Portland USA · 90 destinations

Other flights from Ontario (ONT)

Atlanta (ATL) Austin (AUS) Baltimore (BWI) Boise (BOI) Charlotte (CLT) Chicago (MDW) Chicago (ORD) Dallas (DAL) All 31 destinations →

Other flights from Seattle (SEA)

Albuquerque (ABQ) Amsterdam (AMS) Anchorage (ANC) Arcata (ACV) Atlanta (ATL) Austin (AUS) Baltimore (BWI) Barcelona (BCN) All 139 destinations →