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Cheap flights from Ontario (ONT) to Seattle (SEA)
Prices were available within the past 7 days and start at $29 for one-way flights and $58 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Origin airport | Los Angeles - Ontario Intl. |
Destination airport | Seattle - Tacoma Intl. |
Airlines serving | Alaska Airlines, American Airlines, Delta, Frontier Airlines, United |
Roundtrip price | $58 |
Distance | 956 mi |
Ontario to Seattle Flights
The cheapest times to fly from Ontario to Seattle
On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ontario to Seattle are during the month of October. You can find some of the cheapest flights from Ontario to Seattle with Expedia's search tool and vast selection of airlines.
The best time to book a flight from Ontario to Seattle
Sunday is one of the best days to book for cheap flights from Ontario to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.
How to find cheap round-trip tickets from Ontario to Seattle
Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ontario to Seattle in 2024. You can also book with separate airlines for your outbound and return journeys, from $29 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.
Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ontario to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.
You could also save big by booking one of Expedia's vacation packages. Bundling together your Ontario to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.
*Terms apply.
Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.
Frequently asked questions
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Top Routes from Ontario
- Ontario to Phoenix (ONT - PHX)
- Ontario to Newark Liberty Intl. Airport (ONT - EWR)
- Ontario to Portland (ONT - PDX)
- Ontario to Honolulu (ONT - HNL)
- Ontario to New York (ONT - LGA)
- Ontario to Manila (ONT - MNL)
- Ontario to Salt Lake City (ONT - SLC)
- Ontario to Denver (ONT - DEN)
- Ontario to New York (ONT - JFK)
- Ontario to Dallas (ONT - DAL)
- Ontario to Guadalajara (ONT - GDL)
- Ontario to Houston (ONT - IAH)
Top Routes to Seattle
- Chicago to Seattle (ORD - SEA)
- Newark Liberty Intl. Airport to Seattle (EWR - SEA)
- Phoenix to Seattle (PHX - SEA)
- San Diego to Seattle (SAN - SEA)
- Boston to Seattle (BOS - SEA)
- New York to Seattle (LGA - SEA)
- Minneapolis to Seattle (MSP - SEA)
- Denver to Seattle (DEN - SEA)
- Washington to Seattle (IAD - SEA)
- New York to Seattle (JFK - SEA)
- Dallas to Seattle (DAL - SEA)
- Houston to Seattle (IAH - SEA)
Top Routes from Ontario
- American Airlines Ontario to Phoenix
- American Airlines Ontario to Newark Liberty Intl. Airport
- Alaska Airlines Ontario to Portland
- Alaska Airlines Ontario to Honolulu
- American Airlines Ontario to New York
- China Airlines Ontario to Manila
- Frontier Airlines Ontario to Denver
- Volaris Ontario to Guadalajara
- Frontier Airlines Ontario to Houston
- Frontier Airlines Ontario to Dallas
Top Routes to Seattle
- Alaska Airlines Chicago to Seattle
- Alaska Airlines Newark Liberty Intl. Airport to Seattle
- Alaska Airlines Phoenix to Seattle
- Alaska Airlines San Diego to Seattle
- Alaska Airlines Boston to Seattle
- Alaska Airlines Minneapolis to Seattle
- Alaska Airlines Denver to Seattle
- Alaska Airlines Washington to Seattle
- Alaska Airlines New York to Seattle
- Alaska Airlines Dallas to Seattle
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Seattle Paine Field Intl. Airport
Los Angeles
Burbank
Orange County
Long Beach
Main Airports for Flights
- San Bernardino Intl. Airport (SBD)
- Fullerton Municipal Airport (FUL)
- John Wayne Airport (SNA)
- Long Beach Municipal Airport (LGB)
- French Valley Airport (RBK)
- Hawthorne Municipal Airport (HHR)
- Hollywood Burbank Airport (BUR)
- Los Angeles Intl. Airport (LAX)
- General William J. Fox Airfield Airport (WJF)
- Palmdale Regional Airport (PMD)