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: Tue May 9 2017 Return: Wed May 10 2017 Trip spans 2 days
United
United
ONT
3:10p
SEA
9:13p
6h 03m
1 stop
SEA
9:57a
ONT
3:36p
5h 39m
1 stop
Depart: Tue Aug 22 2017 Return: Wed Sep 6 2017 Trip spans 16 days
Major Airline
Major Airline
ONT
2:58a
SEA
7:29a
4h 31m
1 stop
SEA
5:00a
ONT
12:06p
7h 06m
1 stop
Depart: Tue Aug 29 2017 Return: Thu Sep 7 2017 Trip spans 10 days
Delta
Delta
ONT
2:00a
SEA
8:25a
6h 25m
1 stop
SEA
7:15a
ONT
12:28p
5h 13m
1 stop
Depart: Tue May 16 2017 Return: Mon May 22 2017 Trip spans 7 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
4:55a
2h 35m
nonstop
SEA
3:50p
ONT
6:15p
2h 25m
nonstop
Depart: Fri Sep 8 2017 Return: Sun Sep 17 2017 Trip spans 10 days
American Airlines
American Airlines
ONT
2:20a
SEA
5:00a
2h 40m
nonstop
SEA
4:25a
ONT
6:59a
2h 34m
nonstop
Depart: Wed May 10 2017 Return: Tue May 16 2017 Trip spans 7 days
United
United
ONT
3:10p
SEA
9:13p
6h 03m
1 stop
SEA
2:00a
ONT
6:06a
4h 06m
1 stop
Depart: Wed May 17 2017 Return: Tue May 23 2017 Trip spans 7 days
United
United
ONT
4:10p
SEA
9:13p
5h 03m
1 stop
SEA
11:30a
ONT
4:36p
5h 06m
1 stop
Depart: Wed Aug 30 2017 Return: Wed Sep 6 2017 Trip spans 8 days
Major Airline
Major Airline
ONT
3:00a
SEA
7:20a
4h 20m
1 stop
SEA
7:00a
ONT
12:06p
5h 06m
1 stop
Depart: Wed May 3 2017 Return: Wed May 10 2017 Trip spans 8 days
Major Airline
Major Airline
ONT
3:00a
SEA
7:18a
4h 18m
1 stop
SEA
7:00a
ONT
12:10p
5h 10m
1 stop
Depart: Tue Oct 3 2017 Return: Tue Oct 10 2017 Trip spans 8 days
Delta
Delta
ONT
2:00a
SEA
8:20a
6h 20m
1 stop
SEA
2:25p
ONT
6:44p
4h 19m
1 stop
Depart: Tue May 23 2017 Return: Sat May 27 2017 Trip spans 5 days
Alaska Airlines
Alaska Airlines
ONT
1:30p
SEA
4:08p
2h 38m
nonstop
SEA
3:50p
ONT
6:15p
2h 25m
nonstop
Depart: Mon May 1 2017 Return: Mon May 22 2017 Trip spans 22 days
United
United
ONT
5:05p
SEA
9:13p
4h 08m
1 stop
SEA
3:10p
ONT
8:11p
5h 01m
1 stop
Depart: Wed Oct 4 2017 Return: Tue Oct 10 2017 Trip spans 7 days
Delta
Delta
ONT
6:20a
SEA
12:20p
6h 00m
1 stop
SEA
2:25p
ONT
6:44p
4h 19m
1 stop
Depart: Wed May 24 2017 Return: Sat May 27 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
2:20a
SEA
4:55a
2h 35m
nonstop
SEA
3:50p
ONT
6:15p
2h 25m
nonstop
Depart: Sat Jul 15 2017 Return: Tue Jul 18 2017 Trip spans 4 days
Major Airline
Major Airline
ONT
11:50a
SEA
11:25p
11h 35m
1 stop
SEA
7:25a
ONT
11:10a
3h 45m
1 stop
Depart: Tue Sep 19 2017 Return: Thu Sep 28 2017 Trip spans 10 days
American Airlines
American Airlines
ONT
2:20a
SEA
5:00a
2h 40m
nonstop
SEA
4:25a
ONT
6:59a
2h 34m
nonstop
Depart: Tue May 2 2017 Return: Tue May 9 2017 Trip spans 8 days
United
United
ONT
5:05p
SEA
9:13p
4h 08m
1 stop
SEA
9:57a
ONT
3:36p
5h 39m
1 stop
Depart: Sat Oct 28 2017 Return: Mon Oct 30 2017 Trip spans 3 days
Delta
Delta
ONT
9:00a
SEA
2:00p
5h 00m
1 stop
SEA
2:25p
ONT
6:44p
4h 19m
1 stop
Depart: Tue Jun 6 2017 Return: Thu Jun 8 2017 Trip spans 3 days
Alaska Airlines
Alaska Airlines
ONT
1:15p
SEA
3:45p
2h 30m
nonstop
SEA
3:50p
ONT
6:16p
2h 26m
nonstop
Depart: Fri Jul 28 2017 Return: Wed Aug 2 2017 Trip spans 6 days
Major Airline
Major Airline
ONT
2:58a
SEA
7:09a
4h 11m
1 stop
SEA
7:00a
ONT
11:10a
4h 10m
1 stop
Direct flights ONT to SEA on American Airlines
Flight # Depart ONT Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
7050 6:20 am 8:55 am May 26 - Jun 3
7050 6:20 am 8:55 am May 21 - May 28
7050 6:20 am 8:55 am May 10 - May 16
7050 6:20 am 8:55 am May 17 - May 24
7050 6:20 am 8:58 am May 9 - May 9
7050 6:20 am 8:55 am May 8 - May 15
7050 6:20 am 9:03 am Apr 27 - May 7
7050 6:20 am 8:55 am May 29 - May 29
7036 11:45 am 2:27 pm Apr 27 - May 4
7036 11:45 am 2:27 pm Apr 30 - May 7
7036 11:45 am 2:20 pm May 8 - May 16
7036 11:45 am 2:26 pm May 10 - May 12
7036 11:45 am 2:20 pm May 11 - May 13
7036 11:45 am 2:20 pm May 17 - May 17
7036 11:45 am 2:30 pm May 1 - May 1
7613 12:04 pm 2:50 pm May 18 - Jun 3
* 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

45 travelers who booked a flight from Ontario to Seattle rated their chosen airlines with an average of 8.2.

Overall
8.5
Boarding
9.0
Crew
8.8
Comfort
8.0
Food
7.4
Entertainment
6.7