Flights from Ontario to Seattle

Flights tailored to your budget

Selected dates may not give results due to COVID-19. We suggest you change the dates.
Multi-city Round trip One way
Round trip
One way
Multi-city
From
No results match your search criteria
To
No results match your search criteria
{{ weekDay }}
Dates
{{ panel.label }}
Looking for a one-way flight?

Flexible dates can save you money

Explore nearby dates to find lower fares

{{ fromDate | dateToLongNamedDate }}
?
Flexible dates
Depart {{ flexibleFromDateLabel }}
{{ option.label }}
?
Return {{ flexibleToDateLabel }}
{{ option.label }}
Passengers / Class
Number of passengers
Adults
{{ adults }}
Children
{{ children }}
Infants
{{ infants }}
Class
Economy
Available for Economy only
New Multi-city experience

Discover a new Multi-city search experience from Jetcost, designed to handle more complex itineraries. By continuing, you’ll be taken to a dedicated page powered by Kiwi.com.
How do we get the info you see here? Please note that we offer an online comparison service and that all information and prices regarding services and/or products available on our website are provided by our third-party partners. We do our best to show you up-to-date information, but please note that we are not responsible for the completeness or accuracy of the information published, so please check all conditions carefully on the website of the partner before making a booking. Please check our Terms and Conditions for more details. Read more

Find out what a flight from Ontario to Seattle might cost

Prices vary based on date, airline, and availability. Compare several options if you're flying between Ontario and Seattle.

Select your dates to check current offers.

Try shifting your departure forward or backward by a day to find better options. If you’re looking for a good deal, consider flying outside peak hours as well.

Exploring all airports near Ontario and Seattle

Checking all the airports available in the area can give you more departure and arrival options for your trip.

  • Airports in Ontario: Ontario is currently the only one operating.
  • Airports in Seattle: Seattle is served by 2 airports - Boeing Field, Lake Union.

Looking at expected traffic to the airport can help avoid surprises on departure day. On busy routes, flying from a quieter airport might also save you money.

Flights from Ontario to Seattle - Tacoma

Customize your flight from Ontario to Seattle

Jetcost allows you to filter by travel dates, duration, layovers, carriers, and booking providers. You’ll find direct and connecting flights, one-way or round-trip, from the best airlines and travel agencies.

Other popular destinations

Thinking about United States? You might also consider: Atlanta, Los Angeles, Miami, New York City, Orlando.

You can sort results by price, duration, or departure time to find the best option for you. When available, results always include both low-cost and traditional airlines.
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: Atlanta, Los Angeles, Miami, New York City, Orlando.

When should I book a flight from Ontario to Seattle?

The best time to book a flight from Ontario to Seattle is 1 month in advance, while the worst time is 6 weeks in advance.

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.