Find Cheap Flights to Ontario

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 to Ontario

(Round-trip)
Depart: Wed Sep 28 2016 Return: Wed Oct 5 2016 Trip spans 8 days
Southwest
Southwest
PDX
ONT
2h 15m
nonstop
ONT
PDX
2h 20m
nonstop
Depart: Tue Oct 4 2016 Return: Wed Oct 19 2016 Trip spans 16 days
Major Airline
Major Airline
PDX
ONT
2h 15m
nonstop
ONT
PDX
2h 20m
nonstop
Depart: Sat Oct 22 2016 Return: Sat Oct 29 2016 Trip spans 8 days
United
United
DEN
ONT
2h 24m
nonstop
ONT
DEN
2h 22m
nonstop
Depart: Sat Oct 29 2016 Return: Tue Nov 1 2016 Trip spans 4 days
Alaska Airlines
Alaska Airlines
SEA
ONT
2h 26m
nonstop
ONT
SEA
2h 40m
nonstop
Depart: Tue Oct 18 2016 Return: Tue Oct 25 2016 Trip spans 8 days
Delta
Delta
SLC
ONT
1h 55m
nonstop
ONT
SLC
1h 45m
nonstop
Depart: Tue Oct 18 2016 Return: Tue Nov 1 2016 Trip spans 15 days
American Airlines
American Airlines
DFW
ONT
3h 08m
nonstop
ONT
DFW
3h 04m
nonstop
Depart: Wed Oct 19 2016 Return: Wed Oct 26 2016 Trip spans 8 days
Major Airline
Major Airline
PDX
ONT
2h 15m
nonstop
ONT
PDX
2h 20m
nonstop
Depart: Wed Nov 2 2016 Return: Wed Nov 9 2016 Trip spans 8 days
Major Airline
Major Airline
PDX
ONT
2h 15m
nonstop
ONT
PDX
2h 40m
nonstop
Depart: Sat Oct 22 2016 Return: Mon Oct 24 2016 Trip spans 3 days
Southwest
Southwest
OAK
ONT
1h 15m
nonstop
ONT
OAK
1h 10m
nonstop
Depart: Thu Jan 5 2017 Return: Sat Jan 7 2017 Trip spans 3 days
Southwest
Southwest
OAK
ONT
1h 15m
nonstop
ONT
OAK
1h 15m
nonstop
Depart: Tue Nov 15 2016 Return: Wed Nov 16 2016 Trip spans 2 days
Major Airline
Major Airline
PDX
ONT
2h 10m
nonstop
ONT
PDX
2h 40m
nonstop
Depart: Mon Dec 12 2016 Return: Tue Dec 13 2016 Trip spans 2 days
Alaska Airlines
Alaska Airlines
SEA
ONT
2h 23m
nonstop
ONT
SEA
2h 37m
nonstop
Depart: Sat Jan 28 2017 Return: Tue Jan 31 2017 Trip spans 4 days
United
United
DEN
ONT
2h 18m
nonstop
ONT
DEN
2h 11m
nonstop
Depart: Sat Jan 28 2017 Return: Tue Jan 31 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
PDX
ONT
2h 13m
nonstop
ONT
PDX
2h 22m
nonstop
Depart: Sun Oct 30 2016 Return: Sat Nov 5 2016 Trip spans 7 days
Southwest
Southwest
OAK
ONT
1h 15m
nonstop
ONT
OAK
1h 10m
nonstop
Depart: Tue Oct 4 2016 Return: Sun Oct 9 2016 Trip spans 6 days
Major Airline
Major Airline
PDX
ONT
2h 15m
nonstop
ONT
PDX
2h 20m
nonstop
Depart: Wed Oct 26 2016 Return: Sat Oct 29 2016 Trip spans 4 days
Delta
Delta
SLC
ONT
1h 43m
nonstop
ONT
SLC
1h 45m
nonstop
Depart: Sat Feb 25 2017 Return: Wed Mar 1 2017 Trip spans 5 days
Alaska Airlines
Alaska Airlines
PDX
ONT
2h 13m
nonstop
ONT
PDX
2h 22m
nonstop
Depart: Wed Oct 12 2016 Return: Thu Oct 13 2016 Trip spans 2 days
United
United
DEN
ONT
2h 18m
nonstop
ONT
DEN
2h 22m
nonstop
Depart: Wed Nov 2 2016 Return: Fri Nov 4 2016 Trip spans 3 days
Southwest
Southwest
OAK
ONT
1h 15m
nonstop
ONT
OAK
1h 30m
nonstop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Here's why:

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At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

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Airports
Origin

Portland
$100
Seattle
$137
Denver
$137
Salt Lake City
$161
Dallas
$177
Oakland
$121
Destination

Ontario
$100
Airlines Airline reviews

48 travelers who booked a flight from Portland to Ontario rated their chosen airlines with an average of 7.9.

Overall
8.2
Boarding
8.3
Crew
8.3
Comfort
8.0
Food
7.5
Entertainment
6.7