Question 1

How long does it take to travel from Ontario to Seattle?

Accepted Answer

A one-way nonstop (direct) flight between Ontario and Seattle takes around 2.7 hours.

Question 2

What is the flight distance between Ontario and Seattle?

Accepted Answer

The flight distance between Ontario and Seattle is 1542 km.

Question 3

What airlines offer nonstop (direct) flights between Ontario and Seattle?

Accepted Answer

Several carriers operate flights between Ontario and Seattle. Airlines offering nonstop (direct) flights include United Airlines, Frontier Airlines, Alaska Airlines.

Question 4

What are the most popular routes to and from Ontario?

Accepted Answer

Travelers frequently search for route combinations, such as Ontario and Orlando, New York, Denver, London, Austin, Las Vegas, Boston, San Francisco, Stockton, Richmond, Jacksonville, Detroit, Manchester, Indianapolis, Bengaluru, Minneapolis, Boise, Cincinnati, Oklahoma City, Guatemala City.

Question 5

What are the most popular routes to and from Seattle?

Accepted Answer

Travelers frequently search for route combinations, such as Seattle and London, Dublin, Manila, Bangkok, Tallinn, Detroit, New York, Manchester, Melbourne, Los Angeles, Chicago, Paris, Denver, Hong Kong, Washington, D.C., Toronto, Denpasar, Atlanta, Dallas, San Salvador.

Question 6

What airports are near Ontario?

Accepted Answer

The main airport in Ontario is Ontario International. It is also served by Tijuana International, San Diego International, Ontario International, John Wayne, Hollywood Burbank, Palm Springs International, Long Beach, Santa Barbara Municipal, Meadows Field, Imperial County.

Question 7

What airports are near Seattle?

Accepted Answer

The main airport in Seattle is Seattle–Tacoma International. It is also served by Vancouver International, Portland International, Abbotsford International, Bellingham International, Paine Field Everett, Yakima Air Terminal, Vancouver Harbour Flight Centre, Victoria Inner Harbour SPB, Pangborn Memorial.

Question 8

Is it possible to combine flights, buses, and trains in one itinerary when traveling between Ontario and Seattle?

Accepted Answer

Yes, it's possible to combine different modes of transport between Ontario and Seattle thanks to our Virtual Interlining technology. Making use of not only flights but also trains and buses between Ontario and Seattle can give rise to new adventures. Read more about how Virtual Interlining works on Kiwi.com Stories.

Question 9

What is Virtual Interlining and how do I use it?

Accepted Answer

Virtual Interlining provides a revolutionary way of traveling. You can combine different modes of transport like flights, trains, and buses into one itinerary. And this often saves money. Thanks to the world's largest carrier database, the Kiwi.com search function enables anyone to mix and match different modes of transport easily.

Question 10

Which airlines fly between Ontario and Seattle?

Accepted Answer

Currently, you can fly between Ontario and Seattle with Alaska Airlines, Frontier Airlines, United Airlines.

Question 11

When's the best time to travel between Ontario and Seattle?

Accepted Answer

If you don’t have specific dates for your trip between Ontario and Seattle, you can enter a date range into the departure and return fields. Most carriers on the Kiwi.com website allow you to search and book up to six months from the day of your search. Order the search results by the best, cheapest, or fastest route, or find the cheapest outbound and return combination in the pricing table.

Question 12

What flights operate between Ontario and Seattle?

Accepted Answer

Traveling between Ontario and Seattle, you can choose between direct (nonstop) flights or flights with one or more stops. You can select the number of stops on your journey, including an overnight stopover, and the duration of the stopover. What's more, you can also select where you want to have your stopover. Want to say "Hi" to a friend in another city en route to your destination? Or fancy a quick round of shopping? Go Multi-City or Nomad and add places to your search that you wish to visit.

Question 13

How many airports are there near Ontario?

Accepted Answer

There are a number of airports in and around Ontario. The main one is Ontario International and other nearby airports include Tijuana International, San Diego International, Ontario International, John Wayne, Hollywood Burbank, Palm Springs International, Long Beach, Santa Barbara Municipal, Meadows Field, Imperial County

Question 14

How many airports are there near Seattle?

Accepted Answer

There are a number of airports in and around Seattle. The main one is Seattle–Tacoma International and other nearby airports include Vancouver International, Portland International, Abbotsford International, Bellingham International, Paine Field Everett, Yakima Air Terminal, Vancouver Harbour Flight Centre, Victoria Inner Harbour SPB, Pangborn Memorial.

Question 15

What time do nonstop (direct) flights between Ontario and Seattle depart?

Accepted Answer

This depends on the airline's flight schedule. You can easily select your preferred departure time when you search on our website or mobile app. Choose the time of day you wish to depart from Ontario, such as morning, afternoon, evening, or night, or select the exact hours for departure.

Question 16

What time do nonstop (direct) flights between Ontario and Seattle arrive?

Accepted Answer

This depends on the airline's flight schedule. You can easily select your preferred arrival time when you search on our website or mobile app. Choose the time of day you wish to arrive at Seattle, such as morning, afternoon, evening, or night, or select the exact hours for arrival.

Question 17

What time do flights between Ontario and Seattle depart?

Accepted Answer

This depends on the airline's flight schedule. You can easily select your preferred departure time when you search on our website or mobile app. Choose the time of day you wish to depart from Ontario, such as morning, afternoon, evening, or night, or select the exact hours for departure.

Question 18

What time do flights between Ontario and Seattle arrive?

Accepted Answer

This depends on the airline's flight schedule. You can easily select your preferred arrival time when you search on our website or mobile app. Choose the time of day you wish to arrive at Seattle, such as morning, afternoon, evening, or night, or select the exact hours for arrival.

Cheapest one-way trip	£34
Cheapest round-trip	£72
Average round-trip	£143
Nonstop flights in June	£42 – £348
Most popular airline	Alaska Airlines

Airline	Mon 03.06	Tue 04.06	Wed 05.06	Thu 06.06	Fri 07.06	Sat 08.06	Sun 09.06
Alaska Airlines	4	4	4	4	4	2	4
Frontier Airlines	1	---	1	1	1	1	1
United Airlines	---	1	---	1	1	---	---

Airline	Mon 10.06	Tue 11.06	Wed 12.06	Thu 13.06	Fri 14.06	Sat 15.06	Sun 16.06
Alaska Airlines	4	4	4	4	4	4	4
Frontier Airlines	1	1	1	1	1	1	1
United Airlines	---	1	1	---	---	---	---

Airline	Mon 17.06	Tue 18.06	Wed 19.06	Thu 20.06	Fri 21.06	Sat 22.06	Sun 23.06
Alaska Airlines	4	4	4	4	4	4	4
Frontier Airlines	1	1	1	1	1	1	1
United Airlines	---	---	---	---	---	---	---

Airline	Mon 24.06	Tue 25.06	Wed 26.06	Thu 27.06	Fri 28.06	Sat 29.06	Sun 30.06
Alaska Airlines	4	4	4	4	4	4	4
Frontier Airlines	1	1	1	1	1	1	1
United Airlines	---	---	---	---	---	---	---

Cheap flights from Ontario, CA to Seattle, WA

Flights starting at £34. Choose between Alaska Airlines, Frontier Airlines, or United Airlines to find the best price.

Tips to know when travelling to Seattle

Cheapest one-way trip

Cheapest round-trip

Average round-trip

Nonstop flights in June

Most popular airline

Search by stops

Search by carrier

Search by price

Search by departure date

One-way trips

Round trips

Weekly direct flights

Weekly direct flights for Mon 03.06 - Sun 09.06

Weekly direct flights for Mon 10.06 - Sun 16.06

Weekly direct flights for Mon 17.06 - Sun 23.06

Weekly direct flights for Mon 24.06 - Sun 30.06

Check-in for a flight from Ontario to Seattle

Weather in Seattle

Average Weather

14 day forecast

Frequently asked questions

Explore alternative trips

Flights from Ontario

Flights to Seattle

Popular routes

The nearest countries with flights to Seattle

Other destination countries from Ontario

Airports near Ontario

Airports near Seattle

Kiwi.com: the best free travel app for Android and iPhone

Company

Platform

Features

Discover

Name	Carrier code	IATA Code	Passport needed during booking	Online check-in available
Alaska Airlines	ASA	AS	No	Opens 24 days before flight Closes 1 hours before flight
Frontier Airlines	FFT	F9	No	Opens 24 days before flight Closes 1 hours before flight
United Airlines	UAL	UA	Yes	No

Month	Average monthly max temperature	Average monthly min temperature
January	7°C	2°C
February	8°C	1°C
March	10°C	3°C
April	13°C	4°C
May	18°C	8°C
June	21°C	10°C
July	25°C	13°C
August	26°C	14°C
September	22°C	11°C
October	15°C	7°C
November	10°C	4°C
December	6°C	1°C