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Cheap flights from Ontario to Seattle
Round-trip
Economy
Flight information for Ontario to Seattle
(ONT to SEA)
Find info about flight duration, direct flights, and airports for your flight from Ontario to Seattle
| Best Price Found | $137 | The best flight deal from Ontario to Seattle found on momondo in the last 72 hours is $137 |
| Fastest flight time | 2h 38m | The fastest flight from Ontario to Seattle takes 2h 38m |
| Direct flights | We and Fr | Direct flights go from Ontario to Seattle on Wednesday and Friday. The only airline offering direct flights is Alaska Airlines. |
| Airports in Seattle | 3 airports | There are 3 airports near Seattle: Seattle King County/Boeing (BFI), Seattle Lake Union Spb (LKE), Seattle/Tacoma Intl (SEA) |
How to get the cheapest flight ticket from Ontario to Seattle
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly from Ontario to Seattle?
January
The cheapest time of year to fly to Seattle from Ontario is January. Most expensive is November
What is the cheapest day to depart Ontario for Seattle?
Wednesday
The cheapest day of the week is typically Wednesday. The most expensive is typically Sunday
When is the cheapest time to fly from Ontario to Seattle?
at noon
Ontario to Seattle flights are approximately 21% more expensive in the morning than at noon
What is the cheapest airline that flies to Seattle from Ontario?
Frontier
Frontier, Major Airline, and United Airlines are the most popular carriers operating from Ontario to Seattle
What is the cheapest Ontario to Seattle flight route?
Ontario - Seattle/Tacoma Intl
Fly from Ontario to Seattle/Tacoma Intl for the best Ontario - Seattle flight prices
ONT
Ontario
SEA
Seattle/Tacoma Intl
How far in advance should you book Ontario to Seattle flights?
52 days before
The cheapest time to buy a flight from Ontario to Seattle is approximately 52 days to departure
60
Days before departure
0
Easily compare round-trip flights from Ontario to Seattle
Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Ontario to Seattle by changing tabs
Alaska Airlines![Alaska Airlines]()
Aug 19![Alaska Airlines]()
Aug 23
ONT8:15 amOntario
2h 35m
SEA10:50 amSeattle/Tacoma Intl
SEA4:50 amSeattle/Tacoma Intl
2h 29m
ONT7:19 amOntario
Alaska Airlines![Alaska Airlines]()
Jun 11![Alaska Airlines]()
Jun 11
ONT10:45 amOntario
2h 38m
SEA1:23 pmSeattle/Tacoma Intl
SEA3:30 pmSeattle/Tacoma Intl
2h 29m
ONT5:59 pmOntario
Find the cheapest one-way flights from Ontario to Seattle
If you're looking for one-way flights from Ontario to Seattle, view some of our deals below provided by Alaska Airlines
Best airlines flying from Ontario to Seattle
Compare and see reviews for airlines that fly from Ontario to Seattle with momondo
AirlineFree CancellationPrice
PriceFrom $71
Free Cancellation
Reviews
Cons: Todo fue Exelente...
1 / 10
PriceFrom $77
Free Cancellation
Reviews
Pros: everything
Cons: nono
1 / 10
PriceFrom $87
Free Cancellation
Reviews
Cons: Wouldn't let us on the flight when there was plenty of time to get there. Manager was arrogant and slow - didn't care. Poor policies at that airport.
1 / 10
PriceFrom $94
Free Cancellation
Reviews
Pros: Yes made sure mask was in place
Cons: No
1 / 10
PriceFrom $98
Free Cancellation
Reviews
Pros: Accommodated to an earlier flight without questions asked.
Cons: Always been a delight!
1 / 10
PriceFrom $106
Free Cancellation
Reviews
Cons: Everything is ok
1 / 10
PriceFrom $149
Free Cancellation
Reviews
Cons: Too many of the passengers were out of control
1 / 10
Which airlines flying from Ontario to Seattle/Tacoma Intl have COVID-19 safety policies in place?
Airlines such as Alaska Airlines have taken additional precautions to make sure you’re safer while traveling. When flying from Ontario to Seattle/Tacoma Intl, expect masks to be provided - they are required onboard. Aircrafts are also being cleaned thoroughly with enhanced products regularly. Additional policies include the installation of HEPA filters and pre-flight testing. Some airlines are even offering socially-distanced seating for a limited time. Keep in mind that policies will vary by airline.
Are airlines flying from Ontario to Seattle/Tacoma Intl offering flexible cancellation due to COVID-19?
To ease the stress of booking flights, some of our airline partners flying from Ontario to Seattle/Tacoma Intl are responding to the global pandemic. The following airlines may have a flexible cancellation policy to help accommodate travelers: Alaska Airlines, United Airlines, and Delta.