Find Cheap 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: Wed May 31 2017 Return: Tue Jun 6 2017 Trip spans 7 days
United
United
ONT
3:10p
SEA
9:13p
6h 03m
1 stop
SEA
9:57a
ONT
3:36p
5h 39m
1 stop
Depart: Mon Oct 9 2017 Return: Fri Oct 20 2017 Trip spans 12 days
Southwest
Southwest
ONT
1:30a
SEA
5:25a
3h 55m
1 stop
SEA
2:50p
ONT
6:55p
4h 05m
1 stop
Depart: Tue Oct 10 2017 Return: Sat Oct 14 2017 Trip spans 5 days
American Airlines
American Airlines
ONT
12:30p
SEA
7:34p
7h 04m
1 stop
SEA
5:10p
ONT
7:37p
2h 27m
nonstop
Depart: Mon Aug 21 2017 Return: Wed Aug 23 2017 Trip spans 3 days
Major Airline
Major Airline
ONT
2:58a
SEA
7:09a
4h 11m
1 stop
SEA
10:25p
ONT
2:20a
3h 55m
1 stop
Depart: Wed Sep 20 2017 Return: Tue Sep 26 2017 Trip spans 7 days
Delta
Delta
ONT
2:00a
SEA
8:20a
6h 20m
1 stop
SEA
2:25p
ONT
6:44p
4h 19m
1 stop
Depart: Wed Jul 5 2017 Return: Wed Jul 12 2017 Trip spans 8 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
4:58a
2h 38m
nonstop
SEA
3:50p
ONT
6:16p
2h 26m
nonstop
Depart: Fri Jun 2 2017 Return: Tue Jun 6 2017 Trip spans 5 days
United
United
ONT
4:10p
SEA
9:13p
5h 03m
1 stop
SEA
11:30a
ONT
3:36p
4h 06m
1 stop
Depart: Wed Aug 23 2017 Return: Wed Sep 6 2017 Trip spans 15 days
Southwest
Southwest
ONT
2:00a
SEA
5:40a
3h 40m
1 stop
SEA
7:40a
ONT
11:40a
4h 00m
1 stop
Depart: Sat Jun 3 2017 Return: Mon Jun 5 2017 Trip spans 3 days
United
United
ONT
3:10p
SEA
9:13p
6h 03m
1 stop
SEA
9:57a
ONT
3:36p
5h 39m
1 stop
Depart: Tue Aug 29 2017 Return: Wed Aug 30 2017 Trip spans 2 days
Major Airline
Major Airline
ONT
10:05p
SEA
12:38a
2h 33m
2 stops
SEA
7:54a
ONT
11:45a
3h 51m
2 stops
Depart: Tue Aug 8 2017 Return: Tue Aug 15 2017 Trip spans 8 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
5:03a
2h 43m
nonstop
SEA
3:50p
ONT
6:18p
2h 28m
nonstop
Depart: Thu Sep 14 2017 Return: Mon Sep 18 2017 Trip spans 5 days
Southwest
Southwest
ONT
7:20a
SEA
11:25a
4h 05m
1 stop
SEA
2:00a
ONT
7:20a
5h 20m
1 stop
Depart: Sat Sep 23 2017 Return: Tue Sep 26 2017 Trip spans 4 days
American Airlines
American Airlines
ONT
8:45a
SEA
4:24p
7h 39m
1 stop
SEA
7:15a
ONT
2:28p
7h 13m
1 stop
Depart: Tue Oct 3 2017 Return: Mon Oct 9 2017 Trip spans 7 days
Major Airline
Major Airline
ONT
3:40a
SEA
6:13a
2h 33m
nonstop
SEA
7:55a
ONT
11:48a
3h 53m
1 stop
Depart: Wed Aug 9 2017 Return: Tue Aug 15 2017 Trip spans 7 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
5:03a
2h 43m
nonstop
SEA
3:50p
ONT
6:18p
2h 28m
nonstop
Depart: Wed May 24 2017 Return: Wed May 31 2017 Trip spans 8 days
United
United
ONT
5:07a
SEA
12:21p
7h 14m
1 stop
SEA
9:57a
ONT
3:36p
5h 39m
1 stop
Depart: Tue Jul 18 2017 Return: Fri Jul 21 2017 Trip spans 4 days
Southwest
Southwest
ONT
1:50a
SEA
5:40a
3h 50m
1 stop
SEA
1:35a
ONT
5:50a
4h 15m
1 stop
Depart: Mon Aug 14 2017 Return: Thu Aug 17 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
5:03a
2h 43m
nonstop
SEA
3:50p
ONT
6:18p
2h 28m
nonstop
Depart: Fri Sep 29 2017 Return: Sat Oct 7 2017 Trip spans 9 days
American Airlines
American Airlines
ONT
7:50a
SEA
10:23a
2h 33m
nonstop
SEA
7:15a
ONT
2:28p
7h 13m
1 stop
Depart: Tue Jul 4 2017 Return: Thu Jul 13 2017 Trip spans 10 days
Major Airline
Major Airline
ONT
4:00a
SEA
6:38a
2h 38m
nonstop
SEA
12:40a
ONT
3:17a
2h 37m
nonstop
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 May 30 - Jun 3
7050 6:20 am 8:58 am Jun 25 - Jul 2
7050 6:20 am 8:58 am Jun 24 - Jun 26
7050 6:20 am 8:54 am Jun 20 - Jun 20
7050 6:20 am 8:58 am Jun 14 - Jun 23
7050 6:20 am 8:58 am Jun 13 - Jun 19
7050 6:20 am 8:58 am Jun 6 - Jun 10
7050 6:20 am 8:58 am Jun 4 - Jun 12
7613 12:00 pm 2:38 pm Jun 4 - Aug 26
7613 12:04 pm 2:50 pm May 20 - Jun 3
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Airports
Origin

Ontario
$194
Destination

Seattle
$194
Airlines Airline reviews

49 travelers who booked a flight from Ontario to Seattle rated their chosen airlines with an average of 8.3.

Overall
8.6
Boarding
9.0
Crew
8.8
Comfort
8.1
Food
7.5
Entertainment
6.8