$109+ Cheap flights from Seattle to Ontario (SEA - ONT)

Booking a flight from Seattle/Tacoma Intl (SEA) to Ontario (ONT) is your only option if you wish to fly from Seattle to Ontario. On a typical day, there are 12 flights from Seattle/Tacoma Intl to Ontario, all of which are around 2h 39m for a nonstop flight. You can also purchase a plane ticket from 5 airlines when you book a flight from Seattle/Tacoma Intl to Ontario.

This flight path from Seattle/Tacoma Intl to Ontario was viewed by 50 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

A quick flight from Seattle to Ontario can take about 2h 40m. Alaska Airlines provides one of the quickest options available for as low as $227. The distance from Seattle to Ontario is about 956 mi. Both multi-stop and nonstop flights can be found to your destination and back.

Our cheapest airline available from Seattle to Ontario is Frontier. Our recent data shows that you can find tickets from as low as $73 on this airline. Additional options worth looking into are Hawaiian Airlines and Delta, starting at $98 and $110 round-trip. Frontier is priced at 72% lower than the current average price of a flight leaving 3 months from now.

For one-way options, check prices for Frontier. According to our data, you can fly for as low as $54. Users have also found prices from $62 and $79 on Southwest and Delta, respectively.

Before booking your flight to Ontario from Seattle, check out the most reliable airlines to get you to your destination on time: Qatar Airways (92%), Alaska Airlines (92%), SkyWest Airlines( 90%).

Looking at all options, your cheapest flight can be booked for $88. While the most popular route (Seattle/Tacoma Intl - Ontario) can be booked for $159 on average, our data indicates $298 when flying from Seattle to Ontario.

Yes. In addition to deals on Seattle to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Ontario.

Yes. Cheapflights offers flight deals from Seattle to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Currently, October is the cheapest month in which you can book a flight from Seattle to Ontario (average of $187). Flying from Seattle to Ontario in February is currently the most expensive (average of $377). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.