ONT to SEA (Ontario to Seattle) Flights

Last Minute Flights from ONT to SEA

Price found within the past 7 days for the specified period. Click for updated prices.

OriginDestinationTravel DatesFlights From*
ONTSeattleJune 22 to July 4$148
*Prices include taxes and fees

Cheapest ONT to SEA Flights

Price found within the past 7 days for the specified period. Click for updated prices.

OriginDestinationTravel DatesFlights From*
ONTSeattleAugust 6 to August 13$58
ONTSeattleOctober 26 to October 26$132
ONTSeattleSeptember 28 to October 5$137
ONTEverettSeptember 28 to October 5$462
*Prices include taxes and fees
ONT to SEA Flight Details
Origin airport
Los Angeles - Ontario Intl.
Origin airport IATA code
ONT
Destination airport
Seattle - Tacoma Intl.
Destination airport IATA code
SEA
Distance
956 mi

Frequently asked questions

Which airlines with flights from Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.) to SEA allow free cancellation due to COVID-19?
To find airlines that allow COVID-19 related changes, just use our handy filter function. Get started by entering your dates. Then, once the available flights are displayed, check the “No change fee” box under “Flexible change policies” on the left. Read through the airline’s rules and regulations before booking your ONT to Sea-Tac Airport airfare.
What airlines fly direct from ONT to Seattle, WA Airport (SEA-Seattle - Tacoma Intl.)?