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 18 2017 Return: Tue Apr 25 2017 Trip spans 8 days
United
United
ONT
5:05p
SEA
9:12p
4h 07m
1 stop
SEA
11:40a
ONT
4:31p
4h 51m
1 stop
Depart: Mon May 1 2017 Return: Tue May 23 2017 Trip spans 23 days
Major Airline
Major Airline
ONT
10:20p
SEA
1:03a
2h 43m
nonstop
SEA
12:25a
ONT
3:23a
2h 58m
nonstop
Depart: Tue May 2 2017 Return: Wed May 3 2017 Trip spans 2 days
Alaska Airlines
Alaska Airlines
ONT
7:45a
SEA
10:27a
2h 42m
nonstop
SEA
3:50p
ONT
6:14p
2h 24m
nonstop
Depart: Tue Apr 11 2017 Return: Sat Apr 22 2017 Trip spans 12 days
Delta
Delta
ONT
2:00a
SEA
6:55a
4h 55m
1 stop
SEA
12:50p
ONT
5:02p
4h 12m
1 stop
Depart: Sun Apr 2 2017 Return: Wed Apr 5 2017 Trip spans 4 days
American Airlines
American Airlines
ONT
3:35p
SEA
9:53p
6h 18m
1 stop
SEA
1:00a
ONT
7:41a
6h 41m
1 stop
Depart: Wed Apr 19 2017 Return: Tue Apr 25 2017 Trip spans 7 days
United
United
ONT
5:05p
SEA
9:13p
4h 08m
1 stop
SEA
11:40a
ONT
4:31p
4h 51m
1 stop
Depart: Thu Apr 20 2017 Return: Tue Apr 25 2017 Trip spans 6 days
United
United
ONT
5:05p
SEA
9:13p
4h 08m
1 stop
SEA
11:40a
ONT
4:31p
4h 51m
1 stop
Depart: Wed May 3 2017 Return: Tue May 9 2017 Trip spans 7 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
5:03a
2h 43m
nonstop
SEA
3:50p
ONT
6:15p
2h 25m
nonstop
Depart: Fri Apr 28 2017 Return: Mon May 1 2017 Trip spans 4 days
Major Airline
Major Airline
ONT
12:45p
SEA
9:46p
9h 01m
1 stop
SEA
3:10p
ONT
2:23a
11h 13m
1 stop
Depart: Fri Apr 21 2017 Return: Tue Apr 25 2017 Trip spans 5 days
United
United
ONT
5:05p
SEA
9:12p
4h 07m
1 stop
SEA
11:40a
ONT
4:31p
4h 51m
1 stop
Depart: Tue May 9 2017 Return: Wed May 10 2017 Trip spans 2 days
Alaska Airlines
Alaska Airlines
ONT
7:45a
SEA
10:20a
2h 35m
nonstop
SEA
3:25a
ONT
5:59a
2h 34m
nonstop
Depart: Sat Apr 29 2017 Return: Tue May 2 2017 Trip spans 4 days
Major Airline
Major Airline
ONT
12:45p
SEA
10:49p
10h 04m
1 stop
SEA
8:00a
ONT
12:10p
4h 10m
1 stop
Depart: Sat Apr 22 2017 Return: Sat Apr 29 2017 Trip spans 8 days
United
United
ONT
5:05p
SEA
9:13p
4h 08m
1 stop
SEA
11:40a
ONT
4:31p
4h 51m
1 stop
Depart: Wed May 10 2017 Return: Tue May 16 2017 Trip spans 7 days
Alaska Airlines
Alaska Airlines
ONT
1:30p
SEA
4:08p
2h 38m
nonstop
SEA
3:50p
ONT
6:15p
2h 25m
nonstop
Depart: Sat Aug 19 2017 Return: Sun Aug 20 2017 Trip spans 2 days
Major Airline
Major Airline
ONT
2:58a
SEA
8:15a
5h 17m
1 stop
SEA
10:25p
ONT
2:18a
3h 53m
1 stop
Depart: Fri Apr 7 2017 Return: Tue Apr 11 2017 Trip spans 5 days
Delta
Delta
ONT
2:00a
SEA
8:25a
6h 25m
1 stop
SEA
2:15p
ONT
6:49p
4h 34m
1 stop
Depart: Tue Apr 25 2017 Return: Wed May 3 2017 Trip spans 9 days
United
United
ONT
5:05p
SEA
9:12p
4h 07m
1 stop
SEA
1:57a
ONT
6:11a
4h 14m
1 stop
Depart: Tue May 16 2017 Return: Tue May 23 2017 Trip spans 8 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
4:55a
2h 35m
nonstop
SEA
3:50p
ONT
6:15p
2h 25m
nonstop
Depart: Wed Apr 26 2017 Return: Sat Apr 29 2017 Trip spans 4 days
United
United
ONT
4:05p
SEA
9:13p
5h 08m
1 stop
SEA
11:40a
ONT
4:31p
4h 51m
1 stop
Depart: Sat Jun 24 2017 Return: Mon Jun 26 2017 Trip spans 3 days
Major Airline
Major Airline
ONT
11:50a
SEA
9:42p
9h 52m
1 stop
SEA
10:25p
ONT
2:23a
3h 58m
1 stop
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 9:03 am Apr 21 - Apr 26
7050 6:20 am 9:03 am Apr 12 - Apr 19
7050 6:20 am 9:03 am Apr 11 - Apr 20
7050 6:20 am 8:55 am Apr 5 - Apr 9
7050 6:20 am 8:55 am Apr 4 - Apr 7
7050 6:20 am 9:03 am Apr 22 - May 2
7613 6:20 am 9:03 am Apr 10 - Apr 10
7036 11:45 am 2:27 pm Apr 18 - Apr 24
7036 11:45 am 2:27 pm Apr 20 - Apr 28
7036 11:45 am 2:17 pm Mar 26 - Apr 2
7036 11:45 am 2:17 pm Apr 1 - Apr 6
7036 11:45 am 2:20 pm Apr 3 - Apr 3
7036 11:45 am 2:17 pm Apr 7 - Apr 8
7036 11:45 am 2:27 pm Apr 10 - Apr 17
7036 11:45 am 2:30 pm May 1 - May 1
7036 11:45 am 2:27 pm Apr 26 - May 3
7036 11:45 am 2:27 pm Apr 11 - Apr 16
7036 11:45 am 2:30 pm Apr 19 - Apr 19
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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
$144
Destination

Seattle
$144
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