Find Deals on Flights from Ontario to Seattle/Tacoma Intl (ONT - SEA)

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
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Book cheap flights from Ontario to Seattle/Tacoma Intl

(Round-trip)
Depart: Mon Sep 19 2016 Return: Wed Sep 21 2016 Trip spans 3 days
Depart: Mon Aug 29 2016 Return: Tue Sep 6 2016 Trip spans 9 days
Depart: Thu Nov 24 2016 Return: Tue Nov 29 2016 Trip spans 6 days
Depart: Sat Sep 24 2016 Return: Sat Oct 1 2016 Trip spans 8 days
Depart: Thu Jul 28 2016 Return: Fri Jul 29 2016 Trip spans 2 days
Depart: Wed Aug 17 2016 Return: Sat Aug 20 2016 Trip spans 4 days
Depart: Tue Sep 27 2016 Return: Mon Oct 3 2016 Trip spans 7 days
Depart: Sat Aug 20 2016 Return: Sat Aug 27 2016 Trip spans 8 days
Depart: Tue Oct 4 2016 Return: Mon Oct 10 2016 Trip spans 7 days
Depart: Wed Aug 24 2016 Return: Sat Aug 27 2016 Trip spans 4 days
Depart: Wed Jan 11 2017 Return: Wed Jan 18 2017 Trip spans 8 days
Depart: Tue Aug 16 2016 Return: Fri Aug 19 2016 Trip spans 4 days
Depart: Sat Aug 27 2016 Return: Thu Sep 1 2016 Trip spans 6 days
Depart: Thu Jan 26 2017 Return: Sun Jan 29 2017 Trip spans 4 days
Depart: Sat Sep 3 2016 Return: Tue Sep 6 2016 Trip spans 4 days
Depart: Tue Aug 30 2016 Return: Wed Aug 31 2016 Trip spans 2 days
Depart: Sat Jan 28 2017 Return: Mon Jan 30 2017 Trip spans 3 days
Depart: Wed Aug 31 2016 Return: Sat Sep 3 2016 Trip spans 4 days
Depart: Mon Oct 24 2016 Return: Thu Oct 27 2016 Trip spans 4 days
Depart: Tue Oct 11 2016 Return: Sat Oct 15 2016 Trip spans 5 days
Direct flights ONT to SEA on Delta
Flight # Depart ONT Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
9127 6:00 am 8:27 am Aug 20 - Aug 27
9127 6:00 am 8:27 am Aug 13 - Aug 13
9127 6:00 am 8:27 am Aug 6 - Aug 6
9128 6:00 am 8:29 am Sep 1 - Sep 9
9128 6:00 am 8:27 am Aug 21 - Aug 26
9128 6:00 am 8:27 am Aug 22 - Aug 22
9128 6:00 am 8:27 am Aug 9 - Aug 19
9128 6:00 am 8:29 am Aug 28 - Sep 3
9128 6:00 am 8:29 am Aug 29 - Sep 5
9128 6:00 am 8:27 am Aug 3 - Aug 5
9128 6:00 am 8:27 am Aug 14 - Aug 14
9128 6:00 am 8:27 am Aug 1 - Aug 8
9127 11:05 am 1:35 pm Sep 1 - Sep 8
9127 11:05 am 1:35 pm Aug 28 - Sep 6
9127 11:05 am 1:35 pm Aug 31 - Aug 31
9127 11:10 am 1:40 pm Aug 22 - Aug 22
9127 11:10 am 1:40 pm Aug 4 - Aug 5
9127 11:10 am 1:40 pm Aug 1 - Aug 7
9127 11:10 am 1:40 pm Aug 9 - Aug 16
9127 11:10 am 1:40 pm Aug 12 - Aug 17
9127 11:10 am 1:40 pm Aug 21 - Aug 26
9127 11:10 am 1:40 pm Aug 18 - Aug 25
9127 11:10 am 1:40 pm Aug 2 - Aug 8
9128 11:10 am 1:40 pm Aug 6 - Aug 13
9128 11:10 am 1:40 pm Aug 20 - Aug 20
9128 11:10 am 1:40 pm Aug 27 - Aug 27
* 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 email and someone from our team will get back to you promptly.

Airports
Origin

Ontario
$133
Destination

Seattle
$133
Airlines Airline reviews

21 travelers who booked a flight from Ontario to Seattle rated their chosen airlines with an average of 8.4.

Overall
8.5
Boarding
9.1
Crew
8.8
Comfort
8.2
Food
7.7
Entertainment
6.7