Find Cheap Flights from Ontario to Washington

Search hundreds of travel sites at once for deals on flights to Washington

Sat 2/24
Sat 3/3
Any month
Compare vs. KAYAK |

Book cheap flights from Ontario to Washington (round-trip)

Airports
Origin
Ontario
$141
only
$141
Destination
Seattle
$141
only
$141
Wed, Mar 14
ONT
SEA
2h 41m
Mon, Apr 23
SEA
ONT
8h 12m
Trip: 41 days
Overall null null
Based on null reviews
Wed, Apr 4
ONT
SEA
6h 12m
Wed, Apr 11
SEA
ONT
13h 58m
Trip: 8 days
Overall null null
Based on null reviews
Wed, Mar 14
ONT
SEA
2h 41m
Sat, Apr 28
SEA
ONT
2h 27m
Trip: 46 days
Overall null null
Based on null reviews
Wed, Mar 14
ONT
SEA
5h 53m
Mon, Apr 30
SEA
ONT
6h 08m
Trip: 48 days
Overall null null
Based on null reviews
Wed, Mar 7
ONT
SEA
4h 45m
Wed, Mar 14
SEA
ONT
5h 44m
Trip: 7 days
Overall null null
Based on null reviews
Wed, Mar 7
ONT
SEA
6h 12m
Sat, Mar 10
SEA
ONT
5h 40m
Trip: 4 days
Overall null null
Based on null reviews
Tue, May 1
ONT
SEA
4h 26m
Wed, May 9
SEA
ONT
4h 55m
Trip: 9 days
Overall null null
Based on null reviews
Thu, Mar 8
ONT
SEA
2h 40m
Sun, Mar 11
SEA
ONT
2h 25m
Trip: 4 days
Overall null null
Based on null reviews
Fri, Mar 9
ONT
SEA
5h 06m
Sat, Mar 10
SEA
ONT
4h 40m
Trip: 2 days
Overall null null
Based on null reviews
Wed, May 2
ONT
SEA
7h 34m
Fri, Jun 1
SEA
ONT
6h 06m
Trip: 31 days
Overall null null
Based on null reviews
Tue, Mar 13
ONT
SEA
20h 52m
Sat, Apr 28
SEA
ONT
8h 12m
Trip: 47 days
Overall null null
Based on null reviews
Wed, Mar 14
ONT
SEA
2h 44m
Fri, Apr 27
SEA
ONT
2h 27m
Trip: 45 days
Overall null null
Based on null reviews
Thu, Mar 8
ONT
SEA
6h 20m
Wed, Mar 21
SEA
ONT
5h 44m
Trip: 13 days
Overall null null
Based on null reviews
Wed, Mar 14
ONT
SEA
6h 12m
Tue, Mar 20
SEA
ONT
6h 15m
Trip: 7 days
Overall null null
Based on null reviews
Thu, May 3
ONT
SEA
5h 02m
Wed, May 9
SEA
ONT
4h 55m
Trip: 7 days
Overall null null
Based on null reviews
Wed, Apr 11
ONT
SEA
15h 37m
Thu, Apr 19
SEA
ONT
22h 33m
Trip: 9 days
Overall null null
Based on null reviews
Wed, Apr 18
ONT
SEA
2h 44m
Wed, Apr 25
SEA
ONT
2h 27m
Trip: 8 days
Overall null null
Based on null reviews
Mon, Mar 12
ONT
SEA
4h 38m
Wed, Mar 21
SEA
ONT
5h 44m
Trip: 10 days
Overall null null
Based on null reviews
Wed, Apr 18
ONT
SEA
5h 10m
Mon, Apr 23
SEA
ONT
8h 12m
Trip: 6 days
Overall null null
Based on null reviews
Sat, May 5
ONT
SEA
4h 26m
Fri, Jun 1
SEA
ONT
6h 06m
Trip: 28 days
Overall null null
Based on null reviews

Ontario to Washington Flight Information

Flights Arrive in Washington
Flights Depart from Ontario
Flight Price $141
Airlines Frontier, Alaska Airlines, United, Delta
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.