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

Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from Ontario to Seattle/Tacoma Intl

(Round-trip)
Depart: Sun Sep 13 2015 Return: Wed Sep 16 2015 Trip spans 4 days
US Airways
US Airways
ONT
2:28a
SEA
9:25a
6h 57m
1 stop
SEA
1:15a
ONT
7:31a
6h 16m
1 stop
Depart: Thu Oct 1 2015 Return: Sun Oct 4 2015 Trip spans 4 days
American Airlines
American Airlines
ONT
3:30p
SEA
9:30p
6h 00m
1 stop
SEA
1:15a
ONT
7:31a
6h 16m
1 stop
Depart: Sat Oct 3 2015 Return: Mon Oct 5 2015 Trip spans 3 days
Delta
Delta
ONT
2:05a
SEA
8:05a
6h 00m
1 stop
SEA
2:15p
ONT
6:26p
4h 11m
1 stop
Depart: Sat Oct 17 2015 Return: Mon Oct 19 2015 Trip spans 3 days
Delta
Delta
ONT
2:05a
SEA
8:05a
6h 00m
1 stop
SEA
2:15p
ONT
6:26p
4h 11m
1 stop
Depart: Sat Oct 24 2015 Return: Mon Oct 26 2015 Trip spans 3 days
Delta
Delta
ONT
2:05a
SEA
8:05a
6h 00m
1 stop
SEA
2:15p
ONT
6:26p
4h 11m
1 stop
Depart: Sat Oct 31 2015 Return: Mon Nov 2 2015 Trip spans 3 days
US Airways
US Airways
ONT
2:28a
SEA
9:25a
6h 57m
1 stop
SEA
12:15a
ONT
6:31a
6h 16m
1 stop
Depart: Thu Nov 12 2015 Return: Sun Nov 15 2015 Trip spans 4 days
Delta
Delta
ONT
1:15p
SEA
5:55p
4h 40m
1 stop
SEA
1:15p
ONT
5:26p
4h 11m
1 stop
Depart: Tue Jul 28 2015 Return: Tue Aug 4 2015 Trip spans 8 days
American Airlines
American Airlines
ONT
3:25p
SEA
9:29p
6h 04m
1 stop
SEA
3:00a
ONT
5:34a
2h 34m
nonstop
Depart: Tue Sep 15 2015 Return: Tue Sep 22 2015 Trip spans 8 days
American Airlines
American Airlines
ONT
6:25a
SEA
8:55a
2h 30m
nonstop
SEA
1:15a
ONT
7:31a
6h 16m
1 stop
Depart: Wed Sep 16 2015 Return: Wed Sep 23 2015 Trip spans 8 days
American Airlines
American Airlines
ONT
6:25a
SEA
8:55a
2h 30m
nonstop
SEA
1:15a
ONT
7:31a
6h 16m
1 stop
Depart: Wed Sep 23 2015 Return: Thu Sep 24 2015 Trip spans 2 days
American Airlines
American Airlines
ONT
6:25a
SEA
8:55a
2h 30m
nonstop
SEA
1:15a
ONT
7:31a
6h 16m
1 stop
Depart: Mon Jul 13 2015 Return: Tue Aug 11 2015 Trip spans 30 days
American Airlines
American Airlines
ONT
3:25p
SEA
9:29p
6h 04m
1 stop
SEA
3:00a
ONT
5:34a
2h 34m
nonstop
Depart: Mon Jul 27 2015 Return: Tue Aug 4 2015 Trip spans 9 days
American Airlines
American Airlines
ONT
3:25p
SEA
9:29p
6h 04m
1 stop
SEA
3:00a
ONT
5:34a
2h 34m
nonstop
Depart: Mon Aug 3 2015 Return: Wed Aug 5 2015 Trip spans 3 days
American Airlines
American Airlines
ONT
3:25p
SEA
9:29p
6h 04m
1 stop
SEA
3:00a
ONT
5:34a
2h 34m
nonstop
Depart: Sun Aug 9 2015 Return: Wed Aug 12 2015 Trip spans 4 days
American Airlines
American Airlines
ONT
3:25p
SEA
9:29p
6h 04m
1 stop
SEA
3:00a
ONT
5:34a
2h 34m
nonstop
Depart: Mon Aug 10 2015 Return: Tue Aug 11 2015 Trip spans 2 days
American Airlines
American Airlines
ONT
3:25p
SEA
9:29p
6h 04m
1 stop
SEA
3:00a
ONT
5:34a
2h 34m
nonstop
Depart: Tue Aug 18 2015 Return: Wed Aug 19 2015 Trip spans 2 days
American Airlines
American Airlines
ONT
2:00a
SEA
4:43a
2h 43m
nonstop
SEA
3:00a
ONT
5:34a
2h 34m
nonstop
Depart: Tue Aug 25 2015 Return: Sat Aug 29 2015 Trip spans 5 days
American Airlines
American Airlines
ONT
6:25a
SEA
8:55a
2h 30m
nonstop
SEA
3:05a
ONT
5:35a
2h 30m
nonstop
Depart: Thu Jun 18 2015 Return: Mon Jun 29 2015 Trip spans 12 days
United
United
ONT
5:03p
SEA
9:10p
4h 07m
1 stop
SEA
1:15a
ONT
6:11a
4h 56m
1 stop
Depart: Tue Jul 21 2015 Return: Thu Jul 23 2015 Trip spans 3 days
Alaska Airlines
Alaska Airlines
ONT
2:00a
SEA
4:43a
2h 43m
nonstop
SEA
3:00a
ONT
5:34a
2h 34m
nonstop
Direct flights ONT to SEA on Delta
Flight # Depart ONT Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
7558 6:00 am 8:37 am Jun 6 - Jun 6
7558 6:00 am 8:37 am May 30 - Jun 1
7558 6:00 am 8:37 am May 29 - Jun 5
7558 6:00 am 8:37 am May 24 - May 31
7609 6:05 am 8:35 am Jun 29 - Jun 30
7609 6:05 am 8:35 am Jun 28 - Jul 1
7609 6:05 am 8:35 am Jun 27 - Jun 27
7609 6:05 am 8:35 am Jun 22 - Jun 26
7609 6:05 am 8:35 am Jun 19 - Jun 19
7609 6:05 am 8:35 am Jun 17 - Jun 25
7609 6:05 am 8:35 am Jun 12 - Jun 16
7609 6:05 am 8:35 am Jun 8 - Jun 15
7609 6:05 am 8:35 am Jun 7 - Jun 11
7574 10:25 am 12:58 pm Jun 7 - Jul 5
7628 10:30 am 1:02 pm May 30 - Jun 5
7628 10:30 am 1:02 pm Jun 4 - Jun 6
7628 10:30 am 1:02 pm May 21 - May 29
Airports
Origin

Ontario
$185
Destination

Seattle
$185