Beginning of main content

Cheap SEA to ONT Flights

Prices were available within the past 7 days and starts at CA $106 for one-way flights and CA $212 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Seattle to Ontario route information

Origin Airport Seattle - Tacoma Intl.
Destination Airport Los Angeles - Ontario Intl.
Flight Price CA $211
Distance 1,530 km

Seattle to Los Angeles Flights

How Expedia save you money on your flight?

One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free!

Flight deals with Expedia


How to find cheap flights with Expedia?

When it comes to finding cheap Expedia flights, the best time to do it is during low season or shoulder season, which ranges between late January to May.

Book a cheap flight with Expedia

Feb 24, 2020

Affordable, excellent service and easy to book

Jan 1, 2017

Amazing and friendly flight crew staff!