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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: Sat Feb 14 2015 Return: Tue Feb 17 2015 Trip spans 4 days
Delta
Delta
ONT
1:10a
SEA
7:15a
6h 05m
1 stop
SEA
11:30a
ONT
5:45p
6h 15m
1 stop
Depart: Sun Feb 15 2015 Return: Tue Feb 17 2015 Trip spans 3 days
Delta
Delta
ONT
8:30a
SEA
1:09p
4h 39m
1 stop
SEA
1:30p
ONT
5:45p
4h 15m
1 stop
Depart: Tue Feb 17 2015 Return: Wed Feb 18 2015 Trip spans 2 days
Delta
Delta
ONT
11:30a
SEA
6:28p
6h 58m
1 stop
SEA
11:30a
ONT
5:45p
6h 15m
1 stop
Depart: Wed Feb 18 2015 Return: Sat Feb 21 2015 Trip spans 4 days
Delta
Delta
ONT
11:30a
SEA
6:28p
6h 58m
1 stop
SEA
11:30a
ONT
3:53p
4h 23m
1 stop
Depart: Thu Feb 19 2015 Return: Fri Feb 20 2015 Trip spans 2 days
Delta
Delta
ONT
1:10a
SEA
7:09a
5h 59m
1 stop
SEA
1:30p
ONT
5:45p
4h 15m
1 stop
Depart: Tue Feb 24 2015 Return: Thu Feb 26 2015 Trip spans 3 days
Delta
Delta
ONT
1:10a
SEA
7:09a
5h 59m
1 stop
SEA
1:30p
ONT
5:45p
4h 15m
1 stop
Depart: Wed Feb 25 2015 Return: Fri Feb 27 2015 Trip spans 3 days
Delta
Delta
ONT
5:10a
SEA
11:25a
6h 15m
1 stop
SEA
1:30p
ONT
5:45p
4h 15m
1 stop
Depart: Thu Feb 26 2015 Return: Sat Feb 28 2015 Trip spans 3 days
Delta
Delta
ONT
1:10a
SEA
7:09a
5h 59m
1 stop
SEA
11:30a
ONT
3:47p
4h 17m
1 stop
Depart: Fri Feb 6 2015 Return: Tue Feb 17 2015 Trip spans 12 days
Delta
Delta
ONT
11:27a
SEA
6:16p
6h 49m
1 stop
SEA
1:30p
ONT
5:45p
4h 15m
1 stop
Depart: Sat Feb 7 2015 Return: Tue Feb 17 2015 Trip spans 11 days
Delta
Delta
ONT
1:15a
SEA
7:25a
6h 10m
1 stop
SEA
1:30p
ONT
5:45p
4h 15m
1 stop
Depart: Mon Feb 9 2015 Return: Tue Feb 17 2015 Trip spans 9 days
Delta
Delta
ONT
11:27a
SEA
4:24p
4h 57m
1 stop
SEA
1:30p
ONT
5:45p
4h 15m
1 stop
Depart: Tue Feb 10 2015 Return: Tue Feb 17 2015 Trip spans 8 days
Delta
Delta
ONT
5:10a
SEA
9:59a
4h 49m
1 stop
SEA
1:30p
ONT
5:45p
4h 15m
1 stop
Depart: Wed Feb 11 2015 Return: Tue Feb 17 2015 Trip spans 7 days
Delta
Delta
ONT
1:15a
SEA
7:29a
6h 14m
1 stop
SEA
1:30p
ONT
5:45p
4h 15m
1 stop
Depart: Fri Feb 27 2015 Return: Mon Mar 2 2015 Trip spans 4 days
Delta
Delta
ONT
1:10a
SEA
7:09a
5h 59m
1 stop
SEA
11:21a
ONT
5:34p
6h 13m
1 stop
Depart: Sat Feb 28 2015 Return: Mon Mar 2 2015 Trip spans 3 days
Delta
Delta
ONT
1:10a
SEA
7:15a
6h 05m
1 stop
SEA
1:10p
ONT
5:34p
4h 24m
1 stop
Depart: Tue Mar 10 2015 Return: Tue Mar 31 2015 Trip spans 22 days
American Airlines
American Airlines
ONT
12:40p
SEA
7:12p
6h 32m
1 stop
SEA
1:15a
ONT
7:33a
6h 18m
1 stop
Depart: Thu Apr 16 2015 Return: Sun Apr 19 2015 Trip spans 4 days
US Airways
US Airways
ONT
2:30a
SEA
9:32a
7h 02m
1 stop
SEA
2:00p
ONT
7:53p
5h 53m
1 stop
Depart: Wed Apr 1 2015 Return: Thu Apr 9 2015 Trip spans 9 days
Multiple Airlines
Multiple Airlines
ONT
6:30a
SEA
9:05a
2h 35m
nonstop
SEA
1:15a
ONT
7:33a
6h 18m
1 stop
Depart: Sun Mar 8 2015 Return: Tue Mar 10 2015 Trip spans 3 days
Alaska Airlines
Alaska Airlines
ONT
6:30a
SEA
9:05a
2h 35m
nonstop
SEA
3:15a
ONT
5:44a
2h 29m
nonstop
Depart: Mon Feb 23 2015 Return: Wed Feb 25 2015 Trip spans 3 days
United
United
ONT
12:33p
SEA
6:13p
5h 40m
1 stop
SEA
6:29a
ONT
12:03p
5h 34m
1 stop
Change your search
Direct flights ONT to SEA on Delta
Flight # Depart ONT Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
9044 6:00 am 8:38 am Mar 9 - Mar 17
9099 10:30 am 1:05 pm Mar 9 - Mar 16
9099 10:30 am 1:05 pm Mar 8 - Mar 10
7498 11:10 am 1:53 pm Jan 29 - Feb 7
7521 11:10 am 1:55 pm Feb 8 - Mar 7
Airports
Origin

Ontario
$181
Destination

Seattle
$181