Cheap Flights from Ontario International Airport to Seattle (SEA) Find and Compare the Best Airline Deals | Skyticket

Departure Date

2025/10
Sun	Mon	Tue	Wed	Thu	Fri	Sat
			1179	2200	3Search	4180
5189	6Search	7Search	8Search	9Search	101,288	11180
12Search	13256	14Search	15Search	16Search	17200	18Search
19Search	20Search	21Search	22Search	23Search	24Search	25Search
26Search	27Search	28Search	29Search	30187	31Search

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2025/10
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Total Fares（Round-Trip/Economy）: USD /Per Person

* Displayed fare(s) may differ from the actual search result

Ontario－Seattle-Tacoma Airport
October Lowest Airfares
USD179

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
November Lowest Airfares
USD180

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
December Lowest Airfares
USD260

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
January Lowest Airfares
USD244

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
February Lowest Airfares -----

Ontario－Seattle
Estimated Flight Time
2 Hours 36 Minutes
Ontario－Seattle
Number of Operating Airlines
5

Operating Airlines for Ontario－Seattle-Tacoma Airport Route
Non-StopAmerican Airlines

Non-StopAlaska Airlines

Delta Air Lines

Hawaiian Airlines

United Airlines

Other Destinations from:Ontario

Ontario－Boston(Logan)
USD242〜
Ontario－Washington D.C(Ronald Reagan Washington National)
USD250〜
Ontario－Washington D.C(Washington Dulles)
USD282〜
Ontario－Washington D.C(Baltimore-Washington)
USD298〜
Ontario－Chicago(O'Hare)
USD176〜
Ontario－Chicago(Midway)
USD207〜
Ontario－Dallas(Love Field)
USD236〜
Ontario－Dallas(/Fort Worth)
USD236〜
* Fares vary in accordance to seat availability
Other Departures to: Seattle

Philadelphia Airport－Seattle(-Tacoma)
USD306〜
Pensacola Airport－Seattle(-Tacoma)
USD506〜
Tri-Cities Airport－Seattle(-Tacoma)
USD158〜
Palm Springs Airport－Seattle(-Tacoma)
USD319〜
* Fares vary in accordance to seat availability