How much should you expect to spend for a flight from Seattle to Ontario?

Flight prices from Seattle to Ontario change depending on demand and time of booking.

$44 is the lowest fare found in the past 15 days.

Studies show that flying midweek — like on a Tuesday or Wednesday — can be cheaper than weekend flights. Still, airfares change frequently, so check updated prices on Jetcost.

Best airport options between Seattle and Ontario

If you're open to flying into or out of more than one airport, you’ll have more routes to compare.

• Airports in Seattle: Seattle is served by 2 airports - Boeing Field, Lake Union.
• Airports in Ontario: Ontario is the sole airport currently available.

Some airports offer extras like lounges, fast track, or self check-in — good to keep in mind. Comparing airports by services offered helps you balance cost and comfort.

Plan smarter: flights from Seattle to Ontario

Find the flight that fits your plans with Jetcost. You can filter results by stops, agencies, budget, time of day, and airline — all in one search.

Other popular destinations

Travelers flying to United States also checked out: Las Vegas, Los Angeles, Miami, New York City, Orlando.

Comparing offers from multiple agencies helps you find the best price for the same route. You can also spot exclusive deals from individual airlines right in the results list.