Browse Origins:
Browse Destinations:

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: Wed Mar 18 2015 Return: Tue Mar 24 2015 Trip spans 7 days
Delta
Delta
ONT
2:15a
SEA
8:02a
5h 47m
1 stop
SEA
2:10p
ONT
6:34p
4h 24m
1 stop
Depart: Wed Mar 11 2015 Return: Tue Mar 17 2015 Trip spans 7 days
Delta
Delta
ONT
2:15a
SEA
8:02a
5h 47m
1 stop
SEA
2:10p
ONT
6:34p
4h 24m
1 stop
Depart: Sat Mar 7 2015 Return: Tue Mar 10 2015 Trip spans 3 days
US Airways
US Airways
ONT
7:40a
SEA
2:44p
7h 04m
1 stop
SEA
1:15a
ONT
7:34a
6h 19m
1 stop
Depart: Wed Apr 1 2015 Return: Wed Apr 29 2015 Trip spans 29 days
Delta
Delta
ONT
12:35p
SEA
7:00p
6h 25m
1 stop
SEA
2:20p
ONT
6:46p
4h 26m
1 stop
Depart: Wed Apr 15 2015 Return: Mon Apr 20 2015 Trip spans 6 days
US Airways
US Airways
ONT
8:35a
SEA
3:38p
7h 03m
1 stop
SEA
1:15a
ONT
7:33a
6h 18m
1 stop
Depart: Wed Apr 22 2015 Return: Sun Apr 26 2015 Trip spans 5 days
US Airways
US Airways
ONT
12:40p
SEA
7:07p
6h 27m
1 stop
SEA
1:15a
ONT
7:33a
6h 18m
1 stop
Depart: Thu Apr 23 2015 Return: Mon Apr 27 2015 Trip spans 5 days
US Airways
US Airways
ONT
8:35a
SEA
3:38p
7h 03m
1 stop
SEA
1:15a
ONT
7:33a
6h 18m
1 stop
Depart: Wed Apr 29 2015 Return: Sun May 3 2015 Trip spans 5 days
US Airways
US Airways
ONT
2:30a
SEA
9:32a
7h 02m
1 stop
SEA
1:15a
ONT
7:33a
6h 18m
1 stop
Depart: Fri May 1 2015 Return: Mon May 4 2015 Trip spans 4 days
US Airways
US Airways
ONT
8:35a
SEA
3:38p
7h 03m
1 stop
SEA
7:25a
ONT
2:05p
6h 40m
1 stop
Depart: Sat May 2 2015 Return: Fri May 8 2015 Trip spans 7 days
US Airways
US Airways
ONT
12:40p
SEA
7:07p
6h 27m
1 stop
SEA
1:15a
ONT
7:33a
6h 18m
1 stop
Depart: Wed May 6 2015 Return: Sat May 16 2015 Trip spans 11 days
US Airways
US Airways
ONT
12:40p
SEA
7:07p
6h 27m
1 stop
SEA
11:00a
ONT
5:06p
6h 06m
1 stop
Depart: Tue Mar 17 2015 Return: Wed Mar 25 2015 Trip spans 9 days
American Airlines
American Airlines
ONT
2:00a
SEA
4:38a
2h 38m
nonstop
SEA
1:15a
ONT
7:34a
6h 19m
1 stop
Depart: Tue May 19 2015 Return: Tue May 26 2015 Trip spans 8 days
Multiple Airlines
Multiple Airlines
ONT
2:00a
SEA
4:37a
2h 37m
nonstop
SEA
3:25a
ONT
5:47a
2h 22m
nonstop
Depart: Wed Jun 3 2015 Return: Sat Jun 6 2015 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
6:30a
SEA
9:02a
2h 32m
nonstop
SEA
3:25a
ONT
5:47a
2h 22m
nonstop
Depart: Tue Mar 31 2015 Return: Wed Apr 1 2015 Trip spans 2 days
American Airlines
American Airlines
ONT
2:00a
SEA
4:38a
2h 38m
nonstop
SEA
4:55p
ONT
7:21p
2h 26m
nonstop
Depart: Tue Apr 7 2015 Return: Tue Apr 14 2015 Trip spans 8 days
American Airlines
American Airlines
ONT
2:00a
SEA
4:39a
2h 39m
nonstop
SEA
3:15a
ONT
5:43a
2h 28m
nonstop
Depart: Tue Apr 14 2015 Return: Sat Apr 18 2015 Trip spans 5 days
American Airlines
American Airlines
ONT
2:00a
SEA
4:39a
2h 39m
nonstop
SEA
1:55p
ONT
4:21p
2h 26m
nonstop
Depart: Sat Apr 18 2015 Return: Tue Apr 21 2015 Trip spans 4 days
American Airlines
American Airlines
ONT
2:00a
SEA
4:39a
2h 39m
nonstop
SEA
3:15a
ONT
5:43a
2h 28m
nonstop
Depart: Tue Apr 21 2015 Return: Tue May 5 2015 Trip spans 15 days
American Airlines
American Airlines
ONT
6:30a
SEA
9:05a
2h 35m
nonstop
SEA
3:25a
ONT
5:47a
2h 22m
nonstop
Depart: Sat Mar 21 2015 Return: Tue Mar 24 2015 Trip spans 4 days
United
United
ONT
1:44p
SEA
9:02p
7h 18m
1 stop
SEA
1:25a
ONT
7:10a
5h 45m
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 28 - Apr 2
9044 6:00 am 8:38 am Mar 24 - Mar 24
9044 6:00 am 8:38 am Mar 20 - Mar 27
9044 6:00 am 8:38 am Mar 19 - Mar 23
9044 6:00 am 8:38 am Mar 9 - Mar 17
9044 6:00 am 8:38 am Mar 29 - Mar 29
9044 6:00 am 8:38 am Mar 30 - Apr 3
9044 6:00 am 8:38 am Apr 4 - Apr 4
9044 6:00 am 8:39 am Apr 5 - Apr 10
9044 6:00 am 8:39 am Apr 6 - Apr 11
9044 6:00 am 8:39 am Apr 7 - Apr 7
9099 10:30 am 1:05 pm Mar 8 - Mar 10
9099 10:30 am 1:05 pm Mar 17 - Mar 17
9099 10:30 am 1:05 pm Apr 8 - Apr 15
9099 10:30 am 1:05 pm Mar 11 - Mar 11
9099 10:30 am 1:05 pm Mar 15 - Mar 22
9099 10:30 am 1:05 pm Mar 9 - Mar 16
9099 10:30 am 1:05 pm Mar 18 - Mar 24
9099 10:30 am 1:05 pm Mar 19 - Mar 19
9099 10:30 am 1:05 pm Mar 25 - Apr 1
9099 10:30 am 1:05 pm Mar 26 - Apr 4
9099 10:30 am 1:05 pm Mar 31 - Apr 7
9099 10:30 am 1:05 pm Apr 6 - Apr 6
Airports
Origin

Ontario
$181
Destination

Seattle
$181