Cheap flights from Ontario to Seattle

Round-trip
1 adult
Economy
From?
To?
Fri 10/1
Fri 10/8

Travel Restriction Alert

The COVID-19 (coronavirus) outbreak may impact travel from Ontario to Seattle.
View current United States travel restrictions

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$83The best flight deal from Ontario to Seattle found on momondo in the last 72 hours is $83
Fastest flight time2h 45mThe fastest flight from Ontario to Seattle takes 2h 45m
Direct flightsFriDirect flights go from Ontario to Seattle on Friday. The only airline offering direct flights is Alaska Airlines.
Airports in Seattle3 airportsThere 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 20% more expensive in the morning than at noon

What is the cheapest airline that flies to Seattle from Ontario?

Frontier

Alaska Airlines, Delta, and Frontier 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

How far in advance should you book Ontario to Seattle flights?

50 days before

The cheapest time to buy a flight from Ontario to Seattle is approximately 50 days to departure


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
Oct 9
ONT12:03 pmOntario
2h 47m
SEA2:50 pmSeattle/Tacoma Intl
Oct 15
SEA2:44 amSeattle/Tacoma Intl
2h 30m
ONT5:14 amOntario
Alaska Airlines
Oct 12
ONT2:00 amOntario
2h 52m
SEA4:52 amSeattle/Tacoma Intl
Oct 12
SEA8:38 amSeattle/Tacoma Intl
2h 30m
ONT11:08 amOntario
Alaska Airlines
Oct 9
ONT7:00 amOntario
2h 52m
SEA9:52 amSeattle/Tacoma Intl
Oct 16
SEA8:38 amSeattle/Tacoma Intl
2h 30m
ONT11:08 amOntario
Multiple Airlines
Oct 16
ONT12:03 pmOntario
2h 47m
SEA2:50 pmSeattle/Tacoma Intl
Oct 22
SEA3:45 pmSeattle/Tacoma Intl
2h 37m
ONT6:22 pmOntario
Multiple Airlines
Oct 13
ONT5:48 amOntario
6h 45m
1 stop
SEA12:33 pmSeattle/Tacoma Intl
Oct 19
SEA2:34 pmSeattle/Tacoma Intl
2h 25m
ONT4:59 pmOntario
Multiple Airlines
Oct 19
ONT12:03 pmOntario
2h 47m
SEA2:50 pmSeattle/Tacoma Intl
Oct 23
SEA7:15 amSeattle/Tacoma Intl
10h 05m
1 stop
ONT5:20 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, Delta and Frontier
Delta
Oct 7
ONT7:05 amOntario
2h 47m
SEA9:52 amSeattle/Tacoma Intl
Delta
Oct 17
ONT2:00 amOntario
2h 49m
SEA4:49 amSeattle/Tacoma Intl
Alaska Airlines
Feb 5
ONT6:40 amOntario
2h 50m
SEA9:30 amSeattle/Tacoma Intl

Search last-minute flights to Seattle from Ontario

Find and compare flight prices for your last-minute flight from Ontario to Seattle
Multiple Airlines
Oct 1
ONT8:39 pmOntario
11h 38m
2 stops
SEA8:17 amSeattle/Tacoma Intl
Oct 9
SEA2:44 amSeattle/Tacoma Intl
2h 30m
ONT5:14 amOntario
Multiple Airlines
Oct 5
ONT6:05 pmOntario
12h 15m
1 stop
SEA6:20 amSeattle/Tacoma Intl
Oct 9
SEA2:34 pmSeattle/Tacoma Intl
2h 25m
ONT4:59 pmOntario
Multiple Airlines
Oct 5
ONT6:05 pmOntario
12h 15m
1 stop
SEA6:20 amSeattle/Tacoma Intl
Oct 7
SEA2:44 amSeattle/Tacoma Intl
2h 30m
ONT5:14 amOntario
Multiple Airlines
Oct 5
ONT6:05 pmOntario
12h 15m
1 stop
SEA6:20 amSeattle/Tacoma Intl
Oct 9
SEA10:15 amSeattle/Tacoma Intl
2h 43m
ONT12:58 pmOntario
Multiple Airlines
Oct 5
ONT6:05 pmOntario
12h 15m
1 stop
SEA6:20 amSeattle/Tacoma Intl
Oct 8
SEA10:15 amSeattle/Tacoma Intl
2h 43m
ONT12:58 pmOntario
Multiple Airlines
Oct 4
ONT9:53 amOntario
6h 31m
1 stop
SEA4:24 pmSeattle/Tacoma Intl
Oct 11
SEA8:29 amSeattle/Tacoma Intl
8h 51m
1 stop
ONT5:20 pmOntario

Best airlines flying from Ontario to Seattle

Compare and see reviews for airlines that fly from Ontario to Seattle with momondo
AirlineRatingFree CancellationPrice
JetBlue
PriceFrom $71
Free Cancellation
Rating
7.0
7.3

Boarding

7.6

Comfort

7.9

Crew

7.2

Entertainment

6.8

Food

Reviews

Outdated media

1 / 10
United Airlines
PriceFrom $77
Free Cancellation
Rating
6.8
7.2

Boarding

6.6

Comfort

7.5

Crew

6.6

Entertainment

6.1

Food

Reviews

Pros: Everything! From ticketing agent to all the crew on our flight back were awesome. Thank you!

1 / 10
Delta
PriceFrom $87
Free Cancellation
Rating
8.3
8.3

Boarding

8.5

Comfort

8.4

Crew

8.1

Entertainment

8.1

Food

Reviews

Great

1 / 10
American Airlines
PriceFrom $94
Free Cancellation
Rating
7.2
7.4

Boarding

7.1

Comfort

7.8

Crew

7.1

Entertainment

6.8

Food

Reviews

Flight attendant for first class is definitely not a morning person. Oh and the WiFi DID NOT WORK!

1 / 10
Alaska Airlines
PriceFrom $98
Free Cancellation
Rating
8.2
8.6

Boarding

8.4

Comfort

8.6

Crew

8.0

Entertainment

7.5

Food

Reviews

Great service

1 / 10
Frontier
PriceFrom $106
Free Cancellation
Rating
6.2
6.5

Boarding

5.9

Comfort

7.0

Crew

4.8

Entertainment

5.0

Food

Reviews

They cancel our flight for next day, refund $25 until September 28 (ridiculous) and for the terrible time that I pass and lost money on Friday because I suppose to work

1 / 10
Spirit Airlines
PriceFrom $149
Free Cancellation
Rating
6.2
6.4

Boarding

5.9

Comfort

6.9

Crew

4.8

Entertainment

5.1

Food

Reviews

Flight delay for 5 hrs agent not helpful. Make me late for other plans. Very disappointed.

1 / 10

  • 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.

  • How far is Ontario to Seattle/Tacoma Intl by plane?

    The straight-line distance from Ontario to Seattle/Tacoma Intl is 966.6 mi. By plane, this route typically takes 2h 43m.


Can I fly to Seattle/Tacoma Intl from Ontario right now?

Information is based on travel restrictions for travel to Seattle/Tacoma Intl within the United States

Most visitors from Ontario need to provide a negative COVID-19 test result and/or quarantine to enter Seattle/Tacoma Intl.

COVID-19 testing requirements
Visitors from Ontario must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Seattle/Tacoma Intl.

Quarantine requirements
Visitors from Ontario are not required to quarantine after entering Seattle/Tacoma Intl.

Can I fly back to Ontario from Seattle/Tacoma Intl?

Returning to Ontario from Seattle/Tacoma Intl

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Ontario.

Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering Ontario.

If you are planning to travel to Seattle at this time, it is recommended that you stay up to date on current restrictions and follow proper safety measures while in public.

Alternative routes for Ontario to Seattle

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Los Angeles to Seattle Flights
Fastest flight time2h 40m
Cheapest price$66
San Diego to Seattle Flights
Fastest flight time2h 45m
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Santa Ana to Seattle Flights
Fastest flight time2h 38m
Cheapest price$72
Oakland, California to Seattle Flights
Fastest flight time1h 58m
Cheapest price$76
Burbank to Seattle Flights
Fastest flight time2h 30m
Cheapest price$77
San Francisco to Seattle Flights
Fastest flight time1h 59m
Cheapest price$97
Sacramento to Seattle Flights
Fastest flight time2h 03m
Cheapest price$104
Reno to Seattle Flights
Fastest flight time1h 50m
Cheapest price$106
San Jose to Seattle Flights
Fastest flight time2h 05m
Cheapest price$107
Fresno to Seattle Flights
Fastest flight time2h 17m
Cheapest price$134
Los Angeles to Spokane Flights
Fastest flight time2h 31m
Cheapest price$137
San Diego to Spokane Flights
Fastest flight time2h 45m
Cheapest price$143

Similar Ontario to Seattle flights

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