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

Departure Date

2025/4
Sun	Mon	Tue	Wed	Thu	Fri	Sat
		1------	2Search	3Search	4458	5458
6322	7321	8Search	9311	10Search	11340	12Search
13Search	14403	15Search	16179	17Search	18239	19Search
20Search	21264	22Search	23Search	24200	25Search	26Search
27270	28198	29Search	30189

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Return Date

2025/4
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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
April Lowest Airfares
USD179

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
May Lowest Airfares
USD189

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
June Lowest Airfares
USD189

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
July Lowest Airfares
USD325

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
August Lowest Airfares
USD263

The airfare displayed above is for Delta Air Lines

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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)
USD244〜
Ontario－Washington D.C(Ronald Reagan Washington National)
USD270〜
Ontario－Washington D.C(Baltimore-Washington)
USD303〜
Ontario－Washington D.C(Washington Dulles)
USD310〜
Ontario－Chicago(O'Hare)
USD255〜
Ontario－Chicago(Midway)
USD262〜
Ontario－Dallas(/Fort Worth)
USD258〜
Ontario－Dallas(Love Field)
USD407〜
* Fares vary in accordance to seat availability
Other Departures to: Seattle

Philadelphia Airport－Seattle(-Tacoma)
USD359〜
* Fares vary in accordance to seat availability