Cheap flights from Seattle to Ontario

Round-trip
1 adult
Economy
From?
To?
Fri 8/6
Fri 8/13

Travel Restriction Alert

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

Flight information for Seattle to Ontario
(SEA to ONT)

Find info about flight duration, direct flights, and airports for your flight from Seattle to Ontario
Best Price Found$134The best flight deal from Seattle to Ontario found on momondo in the last 72 hours is $134
Fastest flight time2h 34mThe fastest flight from Seattle to Ontario takes 2h 34m
Direct flightsSatDirect flights go from Seattle to Ontario on Saturday. Airlines offering direct flights are: Alaska Airlines and Qatar Airways.
Airports in Ontario1 airportThere is 1 airport near Ontario: Ontario (ONT)

How to get the cheapest flight ticket from Seattle to Ontario

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 Seattle to Ontario?

July

The cheapest time of year to fly to Ontario from Seattle is July. Most expensive is December

What is the cheapest day to depart Seattle for Ontario?

Wednesday

The cheapest day of the week is typically Wednesday. The most expensive is typically Sunday

When is the cheapest time to fly from Seattle to Ontario?

in the afternoon

Seattle to Ontario flights are approximately 30% more expensive at noon than in the afternoon

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

Spirit Airlines

Alaska Airlines, Delta, and Frontier are the most popular carriers operating from Seattle to Ontario

What is the cheapest Seattle to Ontario flight route?

Seattle/Tacoma Intl - Ontario

Fly from Seattle/Tacoma Intl to Ontario for the best Seattle - Ontario flight prices

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

31 days before

The cheapest time to buy a flight from Seattle to Ontario is approximately 31 days to departure


Easily compare round-trip flights from Seattle to Ontario

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 Seattle to Ontario by changing tabs
Multiple Airlines
Sep 7
SEA3:20 amSeattle/Tacoma Intl
2h 27m
ONT5:47 amOntario
Sep 14
ONT6:54 amOntario
7h 11m
1 stop
SEA2:05 pmSeattle/Tacoma Intl
Alaska Airlines
Sep 5
SEA3:20 amSeattle/Tacoma Intl
2h 27m
ONT5:47 amOntario
Sep 5
ONT7:50 amOntario
2h 39m
SEA10:29 amSeattle/Tacoma Intl
Alaska Airlines
Sep 17
SEA2:44 amSeattle/Tacoma Intl
2h 37m
ONT5:21 amOntario
Sep 19
ONT2:00 amOntario
2h 45m
SEA4:45 amSeattle/Tacoma Intl
Multiple Airlines
Oct 27
SEA1:55 pmSeattle/Tacoma Intl
2h 25m
ONT4:20 pmOntario
Oct 28
ONT7:15 amOntario
2h 42m
SEA9:57 amSeattle/Tacoma Intl
Multiple Airlines
Aug 26
SEA10:09 amSeattle/Tacoma Intl
2h 47m
ONT12:56 pmOntario
Sep 3
ONT10:50 amOntario
2h 35m
SEA1:25 pmSeattle/Tacoma Intl
Multiple Airlines
Aug 14
SEA12:40 pmSeattle/Tacoma Intl
5h 38m
1 stop
ONT6:18 pmOntario
Aug 21
ONT3:25 pmOntario
2h 35m
SEA6:00 pmSeattle/Tacoma Intl

Find the cheapest one-way flights from Seattle to Ontario

If you're looking for one-way flights from Seattle to Ontario, view some of our deals below provided by Alaska Airlines and Frontier
Alaska Airlines
Sep 15
SEA11:59 amSeattle/Tacoma Intl
2h 30m
ONT2:29 pmOntario
Alaska Airlines
Sep 29
SEA2:44 amSeattle/Tacoma Intl
2h 37m
ONT5:21 amOntario
Multiple Airlines
Aug 17
SEA12:40 pmSeattle/Tacoma Intl
5h 38m
1 stop
ONT6:18 pmOntario

Best airlines flying from Seattle to Ontario

Compare and see reviews for airlines that fly from Seattle to Ontario with momondo
AirlineRatingFree CancellationPrice
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
8.2
8.3

Boarding

8.5

Comfort

8.3

Crew

7.9

Entertainment

8.0

Food

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
Alaska Airlines
PriceFrom $88
Free Cancellation
Rating
8.3
8.7

Boarding

8.4

Comfort

8.7

Crew

8.1

Entertainment

7.6

Food

Reviews

Pros: The comfort of the plane was great! Lots of room and very comfortable seating.

Cons: I found some members of staff to be a bit rude. When other passengers asked questions or did something wrong (that was a minor issue), one of the staff members in particular talked down to them and treated them like they were stupid.

1 / 10
Spirit Airlines
PriceFrom $91
Free Cancellation
Rating
6.3
6.5

Boarding

6.0

Comfort

7.0

Crew

5.3

Entertainment

5.4

Food

Reviews

Pros: Well, it was not very comfortable and we were delayed for an hour. And a crew member was sick.

Cons: Mostly everything.

1 / 10
JetBlue
PriceFrom $95
Free Cancellation
Rating
7.1
7.4

Boarding

7.6

Comfort

8.0

Crew

7.2

Entertainment

6.8

Food

Reviews

Cons: Boarding at a tourist location is tough but cabin space is prestigious nowadays. Passengers need to be given clear guidance for carry-on baggage since it delays the onboarding process.

1 / 10
American Airlines
PriceFrom $97
Free Cancellation
Rating
7.2
7.4

Boarding

7.1

Comfort

7.8

Crew

7.0

Entertainment

6.8

Food

Reviews

Pros: Delayed flight no reasons seems like American Airlines don’t know what to do in these situations

Cons: I believe this airlines should have figured the answer to this question by now.

1 / 10
Frontier
PriceFrom $106
Free Cancellation
Rating
6.0
6.3

Boarding

5.8

Comfort

6.7

Crew

4.9

Entertainment

5.1

Food

Reviews

Pros: Nothing.

Cons: Provide Atleast water. Seats were terribly uncomfortable. No cushion and barely enough leg room to cross your legs.

1 / 10
Southwest
PriceFrom $258
Free Cancellation
Rating
8.3
8.5

Boarding

8.4

Comfort

8.7

Crew

7.5

Entertainment

7.7

Food

Reviews

Pros: The plane was new and the seats were nice.

1 / 10

  • Are airlines flying from Seattle/Tacoma Intl to Ontario offering flexible cancellation due to COVID-19?

    Some of our partner airlines flying from Seattle/Tacoma Intl to Ontario are adopting new policies due to the global impact of COVID-19. Some of the airlines that may be waiving their cancellation fees are Alaska Airlines, United Airlines, and Delta. You can search for the full list of airlines like Alaska Airlines that are offering this flexibility.

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

    The distance between Seattle/Tacoma Intl and Ontario is about 966.6 mi. A reasonable flight in good conditions will take 2h 25m.


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

Information is based on travel restrictions for travel to Ontario within the United States

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

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.

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

Returning to Seattle/Tacoma Intl from Ontario

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.

If you are planning to travel to Ontario 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 Seattle to Ontario

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
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