Cheap Flights from Seattle to Ontario (SEA - ONT)

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youth
12-17
Child
2-11
Seat Infant
under 2
Lap Infant
under 2
The price shown for each flight will be the average for all passengers including any infants.
Compare vs. KAYAK all | none

Best fares from SEA to ONT

Sun Mon Tue Wed Thu Fri Sat
  1 $307 2 $215 3 $215 4 $218 5 $214 6 $186
7 $204 8 $198 9 $188 10 $189 11 $204 12 $204 13 $216
14 $204 15 $238 16 $204 17 $204 18 $214 19 $290 20 $320
21 $302 22 $273 23 $362 24 $310 25 $256 26 $348 27 $432
28 $447 29 $306 30 $268 31 $282      

Best fares found by others...

KAYAK searches hundreds of sites to find the best rate for your next flight from Seattle to Ontario. Get the best flight deal for your Ontario trip!
Here's how it works. Search KAYAK for a flight ticket from Seattle to Ontario. Sort, filter and compare results on one web page. Then book your plane ticket direct on the airline or travel agent site of your choice!
Direct flights SEA to ONT on American Airlines
Flight # Depart SEA Arrive ONT Sun Mon Tue Wed Thu Fri Sat Valid Between
7025 7:05 am 9:37 am Nov 20 - Nov 30
7025 7:05 am 9:37 am Dec 1 - Dec 6
7025 7:10 am 9:34 am Dec 7 - Dec 14
7025 7:10 am 9:34 am Dec 8 - Dec 11
7025 7:10 am 9:34 am Dec 15 - Dec 22
7025 7:10 am 9:34 am Dec 24 - Dec 30
7025 7:10 am 9:34 am Dec 25 - Jan 1
7025 7:10 am 9:34 am Dec 17 - Dec 23
7005 3:25 pm 5:50 pm Nov 20 - Dec 4
7005 3:25 pm 5:44 pm Dec 8 - Dec 16
7005 3:25 pm 5:44 pm Dec 31 - Jan 4
7005 3:25 pm 5:50 pm Dec 5 - Dec 5
7005 3:25 pm 5:44 pm Dec 7 - Dec 12
7005 3:25 pm 5:44 pm Dec 17 - Dec 28
7005 3:25 pm 5:44 pm Dec 18 - Dec 30
7021 8:55 pm 11:19 pm Dec 18 - Dec 26
7021 8:55 pm 11:18 pm Nov 20 - Dec 1
7021 8:55 pm 11:19 pm Dec 29 - Jan 2
7021 8:55 pm 11:19 pm Dec 20 - Dec 24
7021 8:55 pm 11:19 pm Dec 27 - Jan 3