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Find Deals on Flights 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: Tue Aug 18 2015 Return: Wed Aug 26 2015 Trip spans 9 days
Delta
Delta
ONT
12:30p
SEA
6:50p
6h 20m
1 stop
SEA
2:15p
ONT
6:42p
4h 27m
1 stop
Depart: Thu Sep 17 2015 Return: Sat Sep 19 2015 Trip spans 3 days
American Airlines
American Airlines
ONT
8:35a
SEA
3:30p
6h 55m
1 stop
SEA
1:15a
ONT
7:33a
6h 18m
1 stop
Depart: Fri Oct 2 2015 Return: Sun Oct 4 2015 Trip spans 3 days
US Airways
US Airways
ONT
8:35a
SEA
3:30p
6h 55m
1 stop
SEA
1:15a
ONT
7:33a
6h 18m
1 stop
Depart: Sun Aug 30 2015 Return: Tue Sep 1 2015 Trip spans 3 days
Delta
Delta
ONT
2:05a
SEA
6:45a
4h 40m
1 stop
SEA
2:20p
ONT
6:31p
4h 11m
1 stop
Depart: Tue Sep 1 2015 Return: Sat Sep 5 2015 Trip spans 5 days
Delta
Delta
ONT
2:15a
SEA
7:05a
4h 50m
1 stop
SEA
6:20a
ONT
1:34p
7h 14m
1 stop
Depart: Wed Sep 2 2015 Return: Sat Sep 5 2015 Trip spans 4 days
Delta
Delta
ONT
2:17p
SEA
7:13p
4h 56m
1 stop
SEA
2:00a
ONT
8:11a
6h 11m
1 stop
Depart: Wed Sep 9 2015 Return: Tue Sep 15 2015 Trip spans 7 days
Delta
Delta
ONT
2:15a
SEA
7:00a
4h 45m
1 stop
SEA
9:08a
ONT
1:42p
4h 34m
1 stop
Depart: Mon Sep 14 2015 Return: Wed Sep 23 2015 Trip spans 10 days
Delta
Delta
ONT
2:15a
SEA
7:00a
4h 45m
1 stop
SEA
2:20p
ONT
6:31p
4h 11m
1 stop
Depart: Tue Sep 15 2015 Return: Wed Sep 23 2015 Trip spans 9 days
Delta
Delta
ONT
2:15a
SEA
7:00a
4h 45m
1 stop
SEA
2:20p
ONT
6:31p
4h 11m
1 stop
Depart: Fri Sep 18 2015 Return: Tue Sep 22 2015 Trip spans 5 days
Delta
Delta
ONT
2:15a
SEA
7:00a
4h 45m
1 stop
SEA
2:20p
ONT
6:31p
4h 11m
1 stop
Depart: Mon Sep 21 2015 Return: Mon Sep 28 2015 Trip spans 8 days
Delta
Delta
ONT
2:15a
SEA
7:00a
4h 45m
1 stop
SEA
2:20p
ONT
6:31p
4h 11m
1 stop
Depart: Tue Sep 22 2015 Return: Tue Sep 29 2015 Trip spans 8 days
Delta
Delta
ONT
2:20p
SEA
7:13p
4h 53m
1 stop
SEA
2:20p
ONT
6:31p
4h 11m
1 stop
Depart: Wed Sep 23 2015 Return: Mon Sep 28 2015 Trip spans 6 days
Delta
Delta
ONT
2:15a
SEA
7:00a
4h 45m
1 stop
SEA
2:20p
ONT
6:31p
4h 11m
1 stop
Depart: Thu Sep 24 2015 Return: Tue Sep 29 2015 Trip spans 6 days
American Airlines
American Airlines
ONT
8:35a
SEA
3:30p
6h 55m
1 stop
SEA
1:15a
ONT
7:33a
6h 18m
1 stop
Depart: Fri Sep 25 2015 Return: Mon Sep 28 2015 Trip spans 4 days
Delta
Delta
ONT
2:15a
SEA
7:00a
4h 45m
1 stop
SEA
2:20p
ONT
6:31p
4h 11m
1 stop
Depart: Sat Sep 26 2015 Return: Mon Sep 28 2015 Trip spans 3 days
Delta
Delta
ONT
2:15a
SEA
8:25a
6h 10m
1 stop
SEA
2:20p
ONT
6:31p
4h 11m
1 stop
Depart: Wed Sep 30 2015 Return: Mon Oct 5 2015 Trip spans 6 days
American Airlines
American Airlines
ONT
8:35a
SEA
3:30p
6h 55m
1 stop
SEA
1:15a
ONT
7:33a
6h 18m
1 stop
Depart: Thu Oct 1 2015 Return: Sun Oct 4 2015 Trip spans 4 days
Delta
Delta
ONT
2:15a
SEA
8:25a
6h 10m
1 stop
SEA
2:15p
ONT
6:31p
4h 16m
1 stop
Depart: Tue Jul 28 2015 Return: Wed Jul 29 2015 Trip spans 2 days
United
United
ONT
3:14p
SEA
8:58p
5h 44m
1 stop
SEA
1:56p
ONT
8:34p
6h 38m
1 stop
Depart: Wed Aug 26 2015 Return: Sat Sep 12 2015 Trip spans 18 days
Alaska Airlines
Alaska Airlines
ONT
2:20p
SEA
4:45p
2h 25m
nonstop
SEA
3:05a
ONT
5:35a
2h 30m
nonstop
Direct flights ONT to SEA on Delta
Flight # Depart ONT Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
7570 6:00 am 8:43 am Jul 25 - Jul 31
7570 6:00 am 8:43 am Jul 12 - Jul 19
7631 6:00 am 8:43 am Aug 1 - Aug 14
7631 6:00 am 8:43 am Jul 20 - Jul 24
7574 10:25 am 12:50 pm Aug 9 - Aug 15
7574 10:25 am 12:50 pm Aug 8 - Aug 13
7574 10:25 am 12:50 pm Aug 7 - Aug 14
7574 10:25 am 12:50 pm Jul 12 - Aug 6
Airports
Origin

Ontario
$191
Destination

Seattle
$191