Find Deals on International 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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Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from worldwide to Ontario

(Round-trip)
Depart: Tue Apr 25 2017 Return: Sat Apr 29 2017 Trip spans 5 days
Major Airline
Major Airline
PDX
ONT
2h 13m
nonstop
ONT
PDX
2h 20m
nonstop
Depart: Sat May 6 2017 Return: Tue May 9 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
PDX
ONT
2h 13m
nonstop
ONT
PDX
2h 18m
nonstop
Depart: Tue May 2 2017 Return: Sat May 6 2017 Trip spans 5 days
United
United
SFO
ONT
1h 26m
nonstop
ONT
SFO
1h 30m
nonstop
Depart: Sat Apr 22 2017 Return: Mon Apr 24 2017 Trip spans 3 days
American Airlines
American Airlines
DFW
ONT
3h 15m
nonstop
ONT
DFW
2h 49m
nonstop
Depart: Tue Mar 14 2017 Return: Sat Mar 18 2017 Trip spans 5 days
Delta
Delta
PDX
ONT
5h 56m
1 stop
ONT
PDX
6h 35m
1 stop
Depart: Fri Mar 24 2017 Return: Sat Apr 1 2017 Trip spans 9 days
Major Airline
Major Airline
SFO
ONT
14h 03m
nonstop
ONT
SFO
7h 35m
nonstop
Depart: Sat May 27 2017 Return: Sat Jun 3 2017 Trip spans 8 days
United
United
SFO
ONT
1h 26m
nonstop
ONT
SFO
1h 30m
nonstop
Depart: Mon Apr 3 2017 Return: Tue Apr 11 2017 Trip spans 9 days
Major Airline
Major Airline
SFO
ONT
11h 44m
nonstop
ONT
SFO
5h 39m
nonstop
Depart: Tue Mar 28 2017 Return: Tue Apr 4 2017 Trip spans 8 days
Alaska Airlines
Alaska Airlines
SEA
ONT
2h 29m
nonstop
ONT
SEA
2h 42m
nonstop
Depart: Thu May 4 2017 Return: Tue May 9 2017 Trip spans 6 days
Major Airline
Major Airline
SFO
ONT
5h 13m
nonstop
ONT
SFO
5h 45m
nonstop
Depart: Sun Apr 16 2017 Return: Wed Apr 19 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
SEA
ONT
2h 27m
nonstop
ONT
SEA
2h 45m
nonstop
Depart: Tue Jun 6 2017 Return: Wed Jun 21 2017 Trip spans 16 days
United
United
SFO
ONT
1h 26m
nonstop
ONT
SFO
1h 18m
nonstop
Depart: Fri Apr 28 2017 Return: Sun Apr 30 2017 Trip spans 3 days
Alaska Airlines
Alaska Airlines
SEA
ONT
2h 23m
nonstop
ONT
SEA
2h 43m
nonstop
Depart: Sat Mar 25 2017 Return: Mon Mar 27 2017 Trip spans 3 days
American Airlines
American Airlines
DFW
ONT
3h 09m
nonstop
ONT
DFW
2h 53m
nonstop
Depart: Wed Apr 19 2017 Return: Tue Apr 25 2017 Trip spans 7 days
Major Airline
Major Airline
SEA
ONT
2h 24m
nonstop
ONT
SEA
2h 42m
nonstop
Depart: Wed Mar 15 2017 Return: Mon Mar 20 2017 Trip spans 6 days
Delta
Delta
SLC
ONT
1h 55m
nonstop
ONT
SLC
1h 49m
nonstop
Depart: Mon Apr 24 2017 Return: Tue Apr 25 2017 Trip spans 2 days
Major Airline
Major Airline
SEA
ONT
2h 23m
nonstop
ONT
SEA
2h 43m
nonstop
Depart: Thu Mar 16 2017 Return: Mon Mar 20 2017 Trip spans 5 days
Delta
Delta
SLC
ONT
1h 46m
nonstop
ONT
SLC
1h 49m
nonstop
Depart: Fri May 5 2017 Return: Sun May 7 2017 Trip spans 3 days
Alaska Airlines
Alaska Airlines
SEA
ONT
2h 24m
nonstop
ONT
SEA
2h 43m
nonstop
Depart: Wed May 17 2017 Return: Fri Jun 2 2017 Trip spans 17 days
American Airlines
American Airlines
DFW
ONT
3h 15m
nonstop
ONT
DFW
3h 04m
nonstop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
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.

If you have more questions or if you have a bad price to report to us,
please send us an email and someone from our team will get back to you promptly.

Airports
Origin

San Francisco
$117
Portland
$109
Seattle
$137
Salt Lake City
$187
Dallas
$175
Destination

Ontario
$109
Airlines Airline reviews

72 travelers who booked a flight from Portland to Ontario rated their chosen airlines with an average of 7.5.

Overall
7.7
Boarding
7.6
Crew
8.0
Comfort
7.5
Food
7.0
Entertainment
6.8