Cheap flights from Ontario to Seattle

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How to get the best price from Ontario to Seattle?

Depending on when you travel and how far in advance you book, fares between Ontario and Seattle can differ a lot.

Pick a travel date to see today’s available fares.

Search engines like Jetcost can highlight price changes in just seconds. For example, some users find better prices by flying on one day of the week over another — try several searches to spot the cheapest day.

Airport options between Ontario and Seattle

Even for routes around 1540 km, using different airports might affect flight cost and travel time.

  • Airports in Ontario: Only Ontario operates here.
  • Airports in Seattle: Seattle offers flights from 2 airports - Boeing Field, Lake Union.

Checking the average travel time to the airport can help you plan better. For some routes, changing your arrival or departure airport might also affect the price.

Flights from Ontario to Seattle - Tacoma

Adjust your flight filters for Ontario – Seattle

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Other popular destinations

Planning a trip to United States? These cities are popular too: Las Vegas, Los Angeles, Miami, New York City, Orlando.

Sorting options let you see the most affordable flights first. Some results may include extra fees shown only at checkout — always read carefully to see what’s included.
Frequently Asked Questions

Frequently asked questions about flights from Ontario to Seattle.

How much does an airline ticket from Ontario to Seattle cost?

Flight prices can vary a lot depending on the period and destination. At the moment, this information is not available for flights from Ontario to Seattle.

How far is Ontario from Seattle?

Ontario is about 1540 km from Seattle.

What are the airports in Seattle?

Seattle has 2 airports: Boeing Field, Lake Union.

What are the airports in Ontario?

Ontario has one airport: Ontario.

What are the most popular cities in United States?

The most popular cities in United States according to our users' searches are: Las Vegas, Los Angeles, Miami, New York City, Orlando.

When should I book a flight from Ontario to Seattle?

This information is not available at the moment.

What is the cheapest month to fly from Ontario to Seattle?

This information is not available at the moment.

What is the most expensive month to fly from Ontario to Seattle?

This information is not available at the moment.

What is the best day of the week to fly from Ontario to Seattle?

This information is not available at the moment.