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: Tue Apr 4 2017 Return: Tue Apr 11 2017 Trip spans 8 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
4:55a
2h 35m
nonstop
SEA
3:50p
ONT
6:14p
2h 24m
nonstop
Depart: Mon Apr 17 2017 Return: Fri Apr 21 2017 Trip spans 5 days
Major Airline
Major Airline
ONT
10:20p
SEA
1:03a
2h 43m
nonstop
SEA
6:00a
ONT
8:27a
2h 27m
nonstop
Depart: Wed Mar 15 2017 Return: Tue Mar 21 2017 Trip spans 7 days
United
United
ONT
1:45a
SEA
7:19a
5h 34m
1 stop
SEA
1:40a
ONT
6:11a
4h 31m
1 stop
Depart: Wed Mar 8 2017 Return: Tue Mar 14 2017 Trip spans 6 days
American Airlines
American Airlines
ONT
7:45a
SEA
3:24p
7h 39m
1 stop
SEA
1:00a
ONT
7:48a
6h 48m
1 stop
Depart: Tue Mar 7 2017 Return: Mon Mar 13 2017 Trip spans 6 days
Delta
Delta
ONT
1:00a
SEA
5:55a
4h 55m
1 stop
SEA
2:25p
ONT
6:52p
4h 27m
1 stop
Depart: Wed Apr 5 2017 Return: Tue Apr 11 2017 Trip spans 7 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
4:55a
2h 35m
nonstop
SEA
3:50p
ONT
6:14p
2h 24m
nonstop
Depart: Thu May 11 2017 Return: Mon May 15 2017 Trip spans 5 days
Major Airline
Major Airline
ONT
10:20p
SEA
12:55a
2h 35m
nonstop
SEA
12:15p
ONT
2:40p
2h 25m
nonstop
Depart: Wed Apr 12 2017 Return: Sat Apr 15 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
5:03a
2h 43m
nonstop
SEA
3:50p
ONT
6:14p
2h 24m
nonstop
Depart: Wed Mar 22 2017 Return: Tue Mar 28 2017 Trip spans 7 days
United
United
ONT
1:45a
SEA
8:50a
7h 05m
1 stop
SEA
1:40a
ONT
6:11a
4h 31m
1 stop
Depart: Tue Apr 18 2017 Return: Fri Apr 21 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
5:03a
2h 43m
nonstop
SEA
3:25a
ONT
5:52a
2h 27m
nonstop
Depart: Wed Apr 19 2017 Return: Mon Apr 24 2017 Trip spans 6 days
Alaska Airlines
Alaska Airlines
ONT
7:45a
SEA
10:30a
2h 45m
nonstop
SEA
4:15p
ONT
6:38p
2h 23m
nonstop
Depart: Fri Mar 17 2017 Return: Mon Mar 20 2017 Trip spans 4 days
Major Airline
Major Airline
ONT
3:00a
SEA
7:16a
4h 16m
1 stop
SEA
10:15p
ONT
2:23a
4h 08m
1 stop
Depart: Thu Apr 20 2017 Return: Sun Apr 23 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
5:03a
2h 43m
nonstop
SEA
3:25a
ONT
5:52a
2h 27m
nonstop
Depart: Thu Mar 2 2017 Return: Sat Mar 4 2017 Trip spans 3 days
American Airlines
American Airlines
ONT
4:55a
SEA
12:04p
7h 09m
1 stop
SEA
10:00a
ONT
4:39p
6h 39m
1 stop
Depart: Fri Apr 21 2017 Return: Sun Apr 23 2017 Trip spans 3 days
Alaska Airlines
Alaska Airlines
ONT
7:45a
SEA
10:27a
2h 42m
nonstop
SEA
3:25a
ONT
5:52a
2h 27m
nonstop
Depart: Sat Jul 1 2017 Return: Sun Jul 9 2017 Trip spans 9 days
Major Airline
Major Airline
ONT
9:15a
SEA
11:40a
2h 25m
nonstop
SEA
5:40a
ONT
8:17a
2h 37m
nonstop
Depart: Fri Mar 10 2017 Return: Mon Mar 13 2017 Trip spans 3 days
Delta
Delta
ONT
1:00a
SEA
7:18a
6h 18m
1 stop
SEA
12:57p
ONT
6:52p
5h 55m
1 stop
Depart: Sat Mar 11 2017 Return: Tue Mar 14 2017 Trip spans 3 days
American Airlines
American Airlines
ONT
11:30a
SEA
6:34p
7h 04m
1 stop
SEA
1:00a
ONT
7:48a
6h 48m
1 stop
Depart: Sat Apr 22 2017 Return: Sun Apr 23 2017 Trip spans 2 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
5:03a
2h 43m
nonstop
SEA
3:25a
ONT
5:52a
2h 27m
nonstop
Depart: Tue Aug 1 2017 Return: Wed Aug 9 2017 Trip spans 9 days
Major Airline
Major Airline
ONT
10:20p
SEA
1:03a
2h 43m
2 stops
SEA
11:50a
ONT
2:18p
2h 28m
2 stops
Direct flights ONT to SEA on American Airlines
Flight # Depart ONT Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
7050 6:20 am 8:55 am Apr 4 - Apr 4
7050 6:20 am 8:55 am Apr 5 - Apr 9
7036 11:00 am 1:38 pm Mar 3 - Mar 8
7036 11:00 am 1:38 pm Mar 7 - Mar 10
7036 11:00 am 1:38 pm Mar 11 - Mar 11
7036 11:45 am 2:20 pm Apr 3 - Apr 3
7036 11:45 am 2:17 pm Mar 12 - Mar 19
7036 11:45 am 2:17 pm Apr 1 - Apr 5
7036 11:45 am 2:17 pm Mar 31 - Apr 7
7036 11:45 am 2:20 pm Mar 24 - Mar 28
7036 11:45 am 2:17 pm Mar 23 - Mar 30
7036 11:45 am 2:17 pm Mar 18 - Mar 25
7036 11:45 am 2:20 pm Mar 17 - Mar 17
7036 11:45 am 2:20 pm Mar 15 - Mar 20
7467 3:25 pm 6:03 pm Mar 3 - Mar 11
7467 3:25 pm 6:03 pm Mar 12 - Mar 15
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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.

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^ The fares displayed in KAYAK ads found on other sites include all taxes and fees for economy class travel and were found by KAYAK users in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.
Airports
Origin

Ontario
$137
Destination

Seattle
$137
Airlines Airline reviews

41 travelers who booked a flight from Ontario to Seattle rated their chosen airlines with an average of 8.1.

Overall
8.4
Boarding
8.9
Crew
8.7
Comfort
7.8
Food
7.2
Entertainment
6.3