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

Departure Date

2026/2
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2026/2
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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
February Lowest Airfares
USD246

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
March Lowest Airfares
USD258

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
April Lowest Airfares -----
Ontario－Seattle-Tacoma Airport
May Lowest Airfares -----
Ontario－Seattle-Tacoma Airport
June Lowest Airfares -----

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)
USD193〜
Ontario－Dallas(Love Field)
USD230〜
* Fares vary in accordance to seat availability
Other Departures to: Seattle

Philadelphia Airport－Seattle(-Tacoma)
USD257〜
Tri-Cities Airport－Seattle(-Tacoma)
USD154〜
Palm Springs Airport－Seattle(-Tacoma)
USD355〜
* Fares vary in accordance to seat availability