Ontario to Seattle Flight Tickets
Compare the best flight deals from Ontario to Seattle
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About Ontario - Seattle Flights
Find the best prices for flights between Ontario (United States) and Seattle (United States) on Tripuck. We compare prices from hundreds of airlines to offer you the best options.
Ontario has 1 airports, while Seattle has 2 airports. Compare flights between all airports to find the best deal.
Cheapest Months for Ontario - Seattle Flights
Best month to fly
May 2026 - 3,361 ₺
May 2026
3,361 ₺
Direct
CheapestApril 2026
3,485 ₺
1 stops
August 2026
6,889 ₺
1 stops
March 2026
7,371 ₺
1 stops
December 2026
14,496 ₺
Direct
| Ay | Flight Type | Price |
|---|---|---|
| May 2026Cheapest | Direct | 3.361 ₺ |
| April 2026 | 1 stops | 3.485 ₺ |
| August 2026 | 1 stops | 6.889 ₺ |
| March 2026 | 1 stops | 7.371 ₺ |
| December 2026 | Direct | 14.496 ₺ |
Prices may change. Based on recent searches.
Popular Ontario - Seattle Flights
Ontario - Seattle
Seattle - Ontario
Airlines on Ontario - Seattle Route
| Havayolu | Uçuş Tipi | Fiyat |
|---|---|---|
 Southwest Airlines | 1 stops | 3.485 ₺ |
Ontario Airports
Seattle Airports
Alternative Routes
Alternative Routes from Ontario
Ontario - Seattle Flight Summary
AIRLINES
American Airlines, Alaska Airlines
Cheaper tickets are usually available on weekdays and with early bookings.
Frequently Asked Questions About Ontario - Seattle Flights
The cheapest Ontario to Seattle flight tickets start from 3,485 ₺. Prices may vary depending on the season, airline, and booking time.
For Ontario, you can use Ontario International Airport (ONT). For Seattle, you can use Seattle-Tacoma International Airport (SEA), Boeing Field International Airport (BFI).
The flight duration from Ontario to Seattle varies for direct flights. Connecting flights may take longer depending on the number of layovers.
American Airlines and Alaska Airlines operate direct flights from Ontario to Seattle.
The cheapest Ontario to Seattle flights are usually found in Nisan and on Çarşambas.
Southwest Airlines offers the cheapest Ontario to Seattle flights starting from 3,485 ₺.