SEARCH ONE AND DONE. - Compare hundreds of travel sites at once.
Choose where to book.
Find deals from over 400 airlines worldwide.

Cheap Flights from Seattle to Ontario (SEA - ONT)

DepartReturn
1 adult
Note: some airlines charge for infants in laps.
The price shown for each flight will be the average for all passengers including any infants.
Choose Sites to Compare vs. KAYAK all | none

Best fares from SEA to ONT (Found by others)

Sun Mon Tue Wed Thu Fri Sat
        1 $199 2 $202 3 $183
4 $199 5 $199 6 $183 7 $180 8 $199 9 $202 10 $180
11 $202 12 $199 13 $183 14 $201 15 $226 16 $216 17 $193
18 $202 19 $205 20 $186 21 $186 22 $284 23 $273 24 $226
25 $216 26 $226 27 $226 28 $186 29 $202 30 $216 31 $206
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 Delta
Flight # Depart SEA Arrive ONT Sun Mon Tue Wed Thu Fri Sat Valid Between
7535 2:10 pm 4:37 pm May 4 - Jun 5
7535 2:10 pm 4:40 pm Apr 15 - May 2