Find Deals on 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 17 2016 Return: Tue May 24 2016 Trip spans 8 days
Alaska Airlines
Alaska Airlines
ONT
1:25p
SEA
4:00p
2h 35m
nonstop
SEA
3:40a
ONT
6:07a
2h 27m
nonstop
Depart: Sat Jun 4 2016 Return: Wed Jun 8 2016 Trip spans 5 days
Major Airline
Major Airline
ONT
9:00a
SEA
2:09p
5h 09m
1 stop
SEA
8:25a
ONT
2:42p
6h 17m
1 stop
Depart: Wed Aug 31 2016 Return: Wed Sep 7 2016 Trip spans 8 days
United
United
ONT
5:05p
SEA
8:51p
3h 46m
1 stop
SEA
5:30a
ONT
10:38a
5h 08m
1 stop
Depart: Sun Sep 11 2016 Return: Sat Sep 17 2016 Trip spans 7 days
Southwest
Southwest
ONT
2:50a
SEA
7:10a
4h 20m
1 stop
SEA
12:50p
ONT
5:35p
4h 45m
1 stop
Depart: Sat Sep 24 2016 Return: Mon Sep 26 2016 Trip spans 3 days
American Airlines
American Airlines
ONT
2:28a
SEA
9:25a
6h 57m
1 stop
SEA
4:40p
ONT
7:12p
2h 32m
nonstop
Depart: Mon Nov 7 2016 Return: Fri Nov 11 2016 Trip spans 5 days
Delta
Delta
ONT
11:30a
SEA
6:00p
6h 30m
1 stop
SEA
1:15p
ONT
5:42p
4h 27m
1 stop
Depart: Tue May 24 2016 Return: Wed May 25 2016 Trip spans 2 days
Alaska Airlines
Alaska Airlines
ONT
2:00a
SEA
4:35a
2h 35m
nonstop
SEA
4:55p
ONT
7:20p
2h 25m
nonstop
Depart: Sat Sep 17 2016 Return: Wed Sep 21 2016 Trip spans 5 days
United
United
ONT
11:10a
SEA
5:29p
6h 19m
1 stop
SEA
1:40a
ONT
6:03a
4h 23m
1 stop
Depart: Wed May 25 2016 Return: Tue Jun 7 2016 Trip spans 14 days
Alaska Airlines
Alaska Airlines
ONT
7:00a
SEA
9:35a
2h 35m
nonstop
SEA
3:40a
ONT
6:14a
2h 34m
nonstop
Depart: Wed Sep 14 2016 Return: Sat Sep 17 2016 Trip spans 4 days
Major Airline
Major Airline
ONT
3:05a
SEA
5:35a
2h 30m
nonstop
SEA
12:40p
ONT
3:12p
2h 32m
nonstop
Depart: Wed Sep 7 2016 Return: Mon Sep 12 2016 Trip spans 6 days
Southwest
Southwest
ONT
2:50a
SEA
7:10a
4h 20m
1 stop
SEA
1:15p
ONT
5:15p
4h 00m
1 stop
Depart: Sat May 21 2016 Return: Wed May 25 2016 Trip spans 5 days
United
United
ONT
1:00p
SEA
8:37p
7h 37m
1 stop
SEA
10:02a
ONT
3:16p
5h 14m
1 stop
Depart: Wed May 18 2016 Return: Mon May 23 2016 Trip spans 6 days
Alaska Airlines
Alaska Airlines
ONT
5:25a
SEA
9:15a
3h 50m
1 stop
SEA
3:40a
ONT
6:07a
2h 27m
nonstop
Depart: Tue Aug 30 2016 Return: Thu Sep 1 2016 Trip spans 3 days
Major Airline
Major Airline
ONT
1:05p
SEA
4:51p
3h 46m
1 stop
SEA
7:10a
ONT
4:14p
9h 04m
1 stop
Depart: Wed Sep 21 2016 Return: Mon Oct 17 2016 Trip spans 27 days
Southwest
Southwest
ONT
2:50a
SEA
7:10a
4h 20m
1 stop
SEA
1:15p
ONT
5:15p
4h 00m
nonstop
Depart: Tue Jun 21 2016 Return: Thu Jun 23 2016 Trip spans 3 days
American Airlines
American Airlines
ONT
7:10a
SEA
9:40a
2h 30m
nonstop
SEA
1:00a
ONT
7:36a
6h 36m
1 stop
Depart: Fri Sep 30 2016 Return: Sun Oct 2 2016 Trip spans 3 days
Delta
Delta
ONT
2:00a
SEA
8:10a
6h 10m
1 stop
SEA
2:15p
ONT
6:41p
4h 26m
1 stop
Depart: Fri Sep 9 2016 Return: Tue Sep 13 2016 Trip spans 5 days
United
United
ONT
4:45p
SEA
8:51p
4h 06m
1 stop
SEA
1:40a
ONT
6:03a
4h 23m
1 stop
Depart: Thu May 26 2016 Return: Tue Jun 7 2016 Trip spans 13 days
Alaska Airlines
Alaska Airlines
ONT
2:00a
SEA
4:35a
2h 35m
nonstop
SEA
3:40a
ONT
6:14a
2h 34m
nonstop
Depart: Mon Aug 29 2016 Return: Wed Aug 31 2016 Trip spans 3 days
Major Airline
Major Airline
ONT
10:00p
SEA
12:29a
2h 29m
nonstop
SEA
11:40p
ONT
2:12a
2h 32m
nonstop
Direct flights ONT to SEA on Delta
Flight # Depart ONT Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
9009 6:00 am 8:35 am May 28 - May 28
9009 6:00 am 8:35 am May 30 - May 31
9018 6:00 am 8:30 am Jun 10 - Jun 10
9018 6:00 am 8:35 am Jun 2 - Jun 4
9018 6:00 am 8:35 am May 21 - May 27
9018 6:00 am 8:30 am Jun 5 - Jun 15
9020 6:00 am 8:35 am May 17 - May 17
9020 6:00 am 8:35 am May 14 - May 20
9023 6:00 am 8:35 am May 10 - May 13
9064 11:00 am 1:35 pm May 16 - May 21
9064 11:00 am 1:35 pm May 23 - May 28
9064 11:00 am 1:35 pm May 14 - May 14
9064 11:00 am 1:35 pm May 13 - May 18
9064 11:00 am 1:35 pm May 12 - May 12
9064 11:00 am 1:35 pm May 6 - May 11
9064 11:00 am 1:35 pm May 15 - May 22
9064 11:00 am 1:35 pm May 24 - May 29
9064 11:00 am 1:35 pm May 27 - Jun 3
9064 11:00 am 1:35 pm May 31 - May 31
9064 11:00 am 1:35 pm Jun 1 - Jun 4
9064 11:00 am 1:35 pm Jun 2 - Jun 2
9064 11:10 am 1:40 pm Jun 9 - Jun 19
9064 11:10 am 1:40 pm Jun 7 - Jun 7
9064 11:10 am 1:40 pm Jun 6 - Jun 13
9064 11:10 am 1:40 pm Jun 5 - Jun 8
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Why aren’t prices accurate 100% of the time?
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Airports
Origin

Ontario
$167
Destination

Seattle
$167