and Get up to C$15 OFF
◊ Applies to bookings for 3+ travelers. Book by Sep 30, 2018.  Learn more
Best Price Guarantee

Find our lowest price to destinations worldwide, guaranteed

Easy Booking

Search, select and save - the fastest way to book your trip

24/7 Customer Care

Get award-winning service and special deals by calling 1-888-766-3163

Free Mobile App

Our deals are mobile,
just like you

Book Flights from Seattle to Ontario

CheapOair.ca will help you to find the best deals on flights from Seattle to Ontario. With our search technology, effortlessly searching flight routes across hundreds of airlines has never been easier or more convenient. With CheapOair.ca, we aim to make it simple and quick to search, select and save on the flights that best suit your needs and budget.

No matter if you are traveling for business or pleasure, we offer a wide range of deals from business class discounts to last minute flight deals to destinations like Ontario. Whether you are planning ahead or looking for last minute tickets, CheapOair has the right flights at the right price. After booking your ticket, explore this page to view blog posts about this destination, learn more about hotels near ONT and read reviews from others who booked their flights with CheapOair.ca.

  • When does the first flight of the day depart from SEA? 5:55AM Alaska Airlines Flight #535
  • When does the last flight depart to ONT? 9:16PM Alaska Airlines Flight #535
  • What is the travel distance between Seattle and Ontario?1,665 miles
  • How many weekly flights are there are between SEA to ONT?There are 21 weekly flights between SEA and ONT.
  • How many daily flights fly between Seattle to Ontario? There are 2 daily flights between SEA and ONT
  • Which is the busiest day in terms of passengers flying from SEA to ONT?Thursday
  • In last 30 days, what is the %age of ONT visitors who spent less than 3 days in the city?100.00 %
  • Which is the nearest airport to Ontario, California?Ogoki Post Airport
  • Which is the nearest airport to Seattle, Washington?Kenmore Air Harbor