Find Cheap Flights from Ontario to Seattle/Tacoma Intl (ONT - SEA)

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
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Book cheap flights from Ontario to Seattle/Tacoma Intl

(Round-trip)
Depart: Wed Sep 6 2017 Return: Tue Sep 12 2017 Trip spans 7 days
United
United
ONT
3:35p
SEA
8:57p
5h 22m
1 stop
SEA
1:40a
ONT
6:04a
4h 24m
1 stop
Depart: Tue Sep 19 2017 Return: Tue Oct 3 2017 Trip spans 15 days
American Airlines
American Airlines
ONT
8:45a
SEA
4:09p
7h 24m
1 stop
SEA
1:00a
ONT
7:43a
6h 43m
1 stop
Depart: Wed Aug 30 2017 Return: Sat Sep 2 2017 Trip spans 4 days
Delta
Delta
ONT
2:43p
SEA
7:29p
4h 46m
1 stop
SEA
12:49p
ONT
5:32p
4h 43m
1 stop
Depart: Tue Aug 15 2017 Return: Thu Aug 17 2017 Trip spans 3 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
5:03a
2h 43m
nonstop
SEA
3:50p
ONT
6:18p
2h 28m
nonstop
Depart: Fri Sep 8 2017 Return: Sat Sep 16 2017 Trip spans 9 days
United
United
ONT
4:45p
SEA
8:57p
4h 12m
1 stop
SEA
2:45p
ONT
8:26p
5h 41m
1 stop
Depart: Mon Sep 11 2017 Return: Tue Sep 12 2017 Trip spans 2 days
United
United
ONT
4:45p
SEA
8:57p
4h 12m
1 stop
SEA
1:40a
ONT
6:04a
4h 24m
1 stop
Depart: Tue Sep 12 2017 Return: Sat Sep 16 2017 Trip spans 5 days
United
United
ONT
3:35p
SEA
8:57p
5h 22m
1 stop
SEA
2:45p
ONT
8:26p
5h 41m
1 stop
Depart: Fri Jan 5 2018 Return: Tue Jan 9 2018 Trip spans 5 days
United
United
ONT
3:00p
SEA
7:51p
4h 51m
1 stop
SEA
12:40a
ONT
4:48a
4h 08m
1 stop
Depart: Sat Sep 16 2017 Return: Tue Sep 19 2017 Trip spans 4 days
Delta
Delta
ONT
2:00a
SEA
8:28a
6h 28m
1 stop
SEA
12:47p
ONT
7:12p
6h 25m
1 stop
Depart: Sat Sep 23 2017 Return: Sun Sep 24 2017 Trip spans 2 days
American Airlines
American Airlines
ONT
8:45a
SEA
4:09p
7h 24m
1 stop
SEA
3:30a
ONT
6:01a
2h 31m
nonstop
Depart: Tue Jan 9 2018 Return: Sat Jan 13 2018 Trip spans 5 days
United
United
ONT
3:00p
SEA
7:51p
4h 51m
1 stop
SEA
8:20a
ONT
3:38p
7h 18m
1 stop
Depart: Wed Aug 23 2017 Return: Sat Aug 26 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
5:03a
2h 43m
nonstop
SEA
3:50p
ONT
6:18p
2h 28m
nonstop
Depart: Fri Sep 22 2017 Return: Mon Sep 25 2017 Trip spans 4 days
Delta
Delta
ONT
2:00a
SEA
8:29a
6h 29m
1 stop
SEA
2:26p
ONT
7:12p
4h 46m
1 stop
Depart: Sun Oct 1 2017 Return: Tue Oct 3 2017 Trip spans 3 days
American Airlines
American Airlines
ONT
2:05a
SEA
4:38a
2h 33m
nonstop
SEA
1:00a
ONT
7:43a
6h 43m
1 stop
Depart: Wed Jan 10 2018 Return: Sat Jan 13 2018 Trip spans 4 days
United
United
ONT
3:00p
SEA
7:51p
4h 51m
1 stop
SEA
8:20a
ONT
3:38p
7h 18m
1 stop
Depart: Sun Aug 27 2017 Return: Mon Aug 28 2017 Trip spans 2 days
Alaska Airlines
Alaska Airlines
ONT
2:05a
SEA
4:38a
2h 33m
nonstop
SEA
5:10p
ONT
7:41p
2h 31m
nonstop
Depart: Mon Sep 25 2017 Return: Wed Oct 4 2017 Trip spans 10 days
Delta
Delta
ONT
2:00a
SEA
6:55a
4h 55m
1 stop
SEA
2:25p
ONT
6:44p
4h 19m
1 stop
Depart: Mon Oct 2 2017 Return: Tue Oct 3 2017 Trip spans 2 days
American Airlines
American Airlines
ONT
2:05a
SEA
4:43a
2h 38m
nonstop
SEA
1:00a
ONT
7:43a
6h 43m
1 stop
Depart: Sat Jan 13 2018 Return: Sat Jan 20 2018 Trip spans 8 days
United
United
ONT
3:00p
SEA
7:51p
4h 51m
1 stop
SEA
8:20a
ONT
3:38p
7h 18m
1 stop
Depart: Sun Sep 3 2017 Return: Wed Sep 6 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
2:05a
SEA
4:38a
2h 33m
nonstop
SEA
5:10p
ONT
7:41p
2h 31m
nonstop
Direct flights ONT to SEA on American Airlines
Flight # Depart ONT Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
7050 6:05 am 8:38 am Aug 30 - Sep 7
7050 6:05 am 8:38 am Aug 27 - Sep 1
7050 6:20 am 9:03 am Aug 21 - Aug 26
7050 6:20 am 9:03 am Aug 14 - Aug 20
7050 6:20 am 9:03 am Aug 22 - Aug 24
7050 6:20 am 9:03 am Aug 12 - Aug 16
7050 6:20 am 9:03 am Jul 27 - Aug 3
7050 6:20 am 9:03 am Aug 6 - Aug 11
7050 6:20 am 9:03 am Aug 4 - Aug 9
7036 11:50 am 2:23 pm Aug 27 - Sep 3
7036 11:50 am 2:23 pm Sep 1 - Sep 11
7613 12:00 pm 2:38 pm Jul 26 - Aug 26
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Airports
Origin

Ontario
$144
Destination

Seattle
$144
Airlines Airline reviews

62 travelers who booked a flight from Ontario to Seattle rated their chosen airlines with an average of 8.4.

Overall
8.6
Boarding
9.0
Crew
9.0
Comfort
8.2
Food
7.5
Entertainment
7.0