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

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

Book cheap flights from Seattle/Tacoma Intl to Ontario

(Round-trip)
Depart: Wed Sep 9 2015 Return: Tue Sep 15 2015 Trip spans 7 days
Alaska Airlines
Alaska Airlines
SEA
3:05a
ONT
5:35a
2h 30m
nonstop
ONT
2:00a
SEA
4:44a
2h 44m
nonstop
Depart: Sat Sep 12 2015 Return: Sat Sep 19 2015 Trip spans 8 days
Alaska Airlines
Alaska Airlines
SEA
3:05a
ONT
5:35a
2h 30m
nonstop
ONT
2:20p
SEA
4:45p
2h 25m
nonstop
Depart: Sat Oct 17 2015 Return: Sat Oct 31 2015 Trip spans 15 days
Alaska Airlines
Alaska Airlines
SEA
3:05a
ONT
5:34a
2h 29m
nonstop
ONT
2:20p
SEA
4:54p
2h 34m
nonstop
Depart: Wed Oct 21 2015 Return: Sat Oct 24 2015 Trip spans 4 days
Alaska Airlines
Alaska Airlines
SEA
4:25p
ONT
6:50p
2h 25m
nonstop
ONT
6:25a
SEA
9:04a
2h 39m
nonstop
Depart: Sat Oct 24 2015 Return: Tue Oct 27 2015 Trip spans 4 days
Alaska Airlines
Alaska Airlines
SEA
3:05a
ONT
5:34a
2h 29m
nonstop
ONT
2:00a
SEA
4:40a
2h 40m
nonstop
Depart: Wed Sep 16 2015 Return: Sun Sep 20 2015 Trip spans 5 days
US Airways
US Airways
SEA
1:15a
ONT
7:31a
6h 16m
1 stop
ONT
3:30p
SEA
9:30p
6h 00m
1 stop
Depart: Thu Oct 22 2015 Return: Sat Oct 24 2015 Trip spans 3 days
Delta
Delta
SEA
2:15p
ONT
6:26p
4h 11m
1 stop
ONT
2:05a
SEA
8:05a
6h 00m
1 stop
Depart: Sun Oct 25 2015 Return: Wed Oct 28 2015 Trip spans 4 days
American Airlines
American Airlines
SEA
1:15a
ONT
7:31a
6h 16m
1 stop
ONT
2:28a
SEA
9:25a
6h 57m
1 stop
Depart: Thu Sep 24 2015 Return: Sun Sep 27 2015 Trip spans 4 days
US Airways
US Airways
SEA
1:15a
ONT
7:31a
6h 16m
1 stop
ONT
3:30p
SEA
9:30p
6h 00m
1 stop
Depart: Sat Nov 7 2015 Return: Wed Nov 11 2015 Trip spans 5 days
American Airlines
American Airlines
SEA
2:10a
ONT
4:44a
2h 34m
nonstop
ONT
1:28a
SEA
8:25a
6h 57m
1 stop
Depart: Wed Aug 5 2015 Return: Mon Aug 10 2015 Trip spans 6 days
American Airlines
American Airlines
SEA
3:00a
ONT
5:34a
2h 34m
nonstop
ONT
3:25p
SEA
9:29p
6h 04m
1 stop
Depart: Tue Aug 4 2015 Return: Tue Aug 18 2015 Trip spans 15 days
American Airlines
American Airlines
SEA
3:00a
ONT
5:34a
2h 34m
nonstop
ONT
6:25a
SEA
8:50a
2h 25m
nonstop
Depart: Tue Sep 1 2015 Return: Tue Sep 15 2015 Trip spans 15 days
American Airlines
American Airlines
SEA
3:05a
ONT
5:35a
2h 30m
nonstop
ONT
6:25a
SEA
8:55a
2h 30m
nonstop
Depart: Thu Sep 10 2015 Return: Tue Sep 15 2015 Trip spans 6 days
Alaska Airlines
Alaska Airlines
SEA
3:05a
ONT
5:35a
2h 30m
nonstop
ONT
2:20p
SEA
4:45p
2h 25m
nonstop
Depart: Thu Oct 15 2015 Return: Sat Oct 17 2015 Trip spans 3 days
Alaska Airlines
Alaska Airlines
SEA
4:25p
ONT
6:50p
2h 25m
nonstop
ONT
6:25a
SEA
9:04a
2h 39m
nonstop
Depart: Wed Sep 30 2015 Return: Fri Oct 9 2015 Trip spans 10 days
Delta
Delta
SEA
2:15p
ONT
6:26p
4h 11m
1 stop
ONT
2:15p
SEA
6:55p
4h 40m
1 stop
Depart: Thu Oct 1 2015 Return: Sat Oct 3 2015 Trip spans 3 days
Delta
Delta
SEA
2:15p
ONT
6:26p
4h 11m
1 stop
ONT
2:05a
SEA
8:05a
6h 00m
1 stop
Depart: Tue Sep 29 2015 Return: Thu Oct 8 2015 Trip spans 10 days
US Airways
US Airways
SEA
1:15a
ONT
7:31a
6h 16m
1 stop
ONT
3:30p
SEA
9:30p
6h 00m
1 stop
Depart: Fri Oct 23 2015 Return: Tue Oct 27 2015 Trip spans 5 days
Alaska Airlines
Alaska Airlines
SEA
4:25p
ONT
6:50p
2h 25m
nonstop
ONT
6:25a
SEA
9:04a
2h 39m
nonstop
Depart: Tue Aug 18 2015 Return: Tue Aug 25 2015 Trip spans 8 days
United
United
SEA
1:40a
ONT
6:03a
4h 23m
1 stop
ONT
4:45p
SEA
8:51p
4h 06m
1 stop
Direct flights SEA to ONT on Delta
Flight # Depart SEA Arrive ONT Sun Mon Tue Wed Thu Fri Sat Valid Between
7539 2:20 pm 4:58 pm May 21 - Jun 6
7577 2:30 pm 5:15 pm Jun 7 - Aug 22
Airports
Origin

Seattle
$174
Destination

Ontario
$174