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

Departure Date

2025/9
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2025/9
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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
September Lowest Airfares
USD251

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
October Lowest Airfares
USD1,297

The airfare displayed above is for Alaska Airlines

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Ontario－Seattle-Tacoma Airport
November Lowest Airfares
USD405

The airfare displayed above is for Delta Air Lines

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Ontario－Seattle-Tacoma Airport
December Lowest Airfares
USD4,477

The airfare displayed above is for Alaska Airlines

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Ontario－Seattle-Tacoma Airport
January 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)
USD257〜
Ontario－Washington D.C(Ronald Reagan Washington National)
USD240〜
Ontario－Washington D.C(Washington Dulles)
USD312〜
Ontario－Washington D.C(Baltimore-Washington)
USD319〜
Ontario－Chicago(O'Hare)
USD228〜
Ontario－Chicago(Midway)
USD254〜
Ontario－Dallas(/Fort Worth)
USD245〜
Ontario－Dallas(Love Field)
USD248〜
* Fares vary in accordance to seat availability
Other Departures to: Seattle

Philadelphia Airport－Seattle(-Tacoma)
USD308〜
Pensacola Airport－Seattle(-Tacoma)
USD371〜
Tri-Cities Airport－Seattle(-Tacoma)
USD139〜
* Fares vary in accordance to seat availability