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

Departure Date

2025/8
Sun	Mon	Tue	Wed	Thu	Fri	Sat
					1437	2420
3425	4355	5316	6316	7254	8424	9424
10834	11825	12316	13178	14227	15266	16276
17277	18194	19138	20167	21194	22199	23167
24167	25167	26177	27156	28266	29300	30157
31207

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Return Date

2025/8
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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
August Lowest Airfares
USD138

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
September Lowest Airfares
USD139

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
October Lowest Airfares
USD138

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
November Lowest Airfares
USD176

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
December Lowest Airfares
USD242

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle
Estimated Flight Time
2 Hours 37 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)
USD232〜
Ontario－Washington D.C(Ronald Reagan Washington National)
USD209〜
Ontario－Washington D.C(Baltimore-Washington)
USD212〜
Ontario－Washington D.C(Washington Dulles)
USD275〜
Ontario－Chicago(O'Hare)
USD195〜
Ontario－Chicago(Midway)
USD202〜
Ontario－Dallas(/Fort Worth)
USD208〜
Ontario－Dallas(Love Field)
USD230〜
* Fares vary in accordance to seat availability
Other Departures to: Seattle

Philadelphia Airport－Seattle(-Tacoma)
USD276〜
Tri-Cities Airport－Seattle(-Tacoma)
USD154〜
Palm Springs Airport－Seattle(-Tacoma)
USD355〜
* Fares vary in accordance to seat availability