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

Departure Date

2025/7
Sun	Mon	Tue	Wed	Thu	Fri	Sat
		1Search	2Search	3Search	4Search	5Search
6Search	7Search	8Search	9Search	10356	11Search	12Search
13Search	14Search	15Search	16Search	17Search	18Search	19Search
20Search	21Search	22Search	23Search	24Search	25Search	26Search
27Search	28Search	29325	30Search	31Search

Select Return Date　　 Change Departure Date

Return Date

2025/7
Sun	Mon	Tue	Wed	Thu	Fri	Sat
		1------	2------	3------	4------	5------
6------	7------	8------	9------	10------	11------	12------
13------	14------	15------	16------	17------	18------	19------
20------	21------	22------	23------	24------	25------	26------
27------	28------	29------	30------	31------

　　Select Departure Date

Currency:US Dollar Loading Searching Fares Updating Fares

Departure Date

―

Return Date

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

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

Ontario－Seattle-Tacoma Airport
July Lowest Airfares
USD325

The airfare displayed above is for Delta Air Lines

Set calendar for this month
Ontario－Seattle-Tacoma Airport
August Lowest Airfares
USD263

The airfare displayed above is for Delta Air Lines

Set calendar for this month

Ontario－Seattle-Tacoma Airport
September Lowest Airfares -----
Ontario－Seattle-Tacoma Airport
October Lowest Airfares
USD1,233

The airfare displayed above is for Alaska Airlines

Set calendar for this month
Ontario－Seattle-Tacoma Airport
November Lowest Airfares
USD386

The airfare displayed above is for Delta Air Lines

Set calendar for this month

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