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.
Compare vs. KAYAK all | none
Browse Origins:
Browse Destinations:

Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from worldwide to Ontario

(Round-trip)
Depart: Tue May 16 2017 Return: Tue May 23 2017 Trip spans 8 days
Major Airline
Major Airline
SFO
ONT
8h 03m
nonstop
ONT
SFO
9h 10m
nonstop
Depart: Sun May 28 2017 Return: Tue May 30 2017 Trip spans 3 days
United
United
SFO
ONT
1h 26m
nonstop
ONT
SFO
1h 30m
nonstop
Depart: Tue Apr 25 2017 Return: Thu Apr 27 2017 Trip spans 3 days
American Airlines
American Airlines
SEA
ONT
6h 41m
1 stop
ONT
SEA
7h 31m
1 stop
Depart: Wed Jul 12 2017 Return: Sat Jul 29 2017 Trip spans 18 days
Alaska Airlines
Alaska Airlines
PDX
ONT
2h 20m
nonstop
ONT
PDX
2h 18m
nonstop
Depart: Tue Oct 10 2017 Return: Wed Oct 18 2017 Trip spans 9 days
Delta
Delta
SEA
ONT
4h 19m
1 stop
ONT
SEA
4h 45m
1 stop
Depart: Wed May 17 2017 Return: Tue May 23 2017 Trip spans 7 days
Major Airline
Major Airline
PDX
ONT
13h 45m
2 stops
ONT
PDX
4h 13m
2 stops
Depart: Thu Aug 31 2017 Return: Sat Sep 9 2017 Trip spans 10 days
United
United
SFO
ONT
1h 18m
nonstop
ONT
SFO
1h 18m
nonstop
Depart: Thu Jun 1 2017 Return: Mon Jun 5 2017 Trip spans 5 days
Major Airline
Major Airline
SFO
ONT
5h 16m
nonstop
ONT
SFO
5h 57m
nonstop
Depart: Sat Sep 2 2017 Return: Sat Sep 9 2017 Trip spans 8 days
United
United
SFO
ONT
1h 18m
nonstop
ONT
SFO
1h 18m
nonstop
Depart: Sat Oct 14 2017 Return: Sat Oct 21 2017 Trip spans 8 days
American Airlines
American Airlines
DFW
ONT
3h 07m
nonstop
ONT
DFW
3h 04m
nonstop
Depart: Tue Jul 25 2017 Return: Tue Aug 1 2017 Trip spans 8 days
Major Airline
Major Airline
SFO
ONT
9h 35m
nonstop
ONT
SFO
6h 28m
nonstop
Depart: Tue May 23 2017 Return: Wed May 31 2017 Trip spans 9 days
Alaska Airlines
Alaska Airlines
PDX
ONT
4h 10m
1 stop
ONT
PDX
2h 18m
nonstop
Depart: Wed Aug 2 2017 Return: Tue Aug 8 2017 Trip spans 7 days
Major Airline
Major Airline
SFO
ONT
5h 53m
nonstop
ONT
SFO
5h 47m
nonstop
Depart: Fri Aug 18 2017 Return: Sun Aug 27 2017 Trip spans 10 days
American Airlines
American Airlines
DFW
ONT
4h 57m
1 stop
ONT
DFW
2h 54m
nonstop
Depart: Wed Sep 27 2017 Return: Fri Sep 29 2017 Trip spans 3 days
Major Airline
Major Airline
SFO
ONT
6h 50m
nonstop
ONT
SFO
8h 45m
nonstop
Depart: Wed Jul 19 2017 Return: Sun Jul 23 2017 Trip spans 5 days
United
United
SFO
ONT
1h 29m
nonstop
ONT
SFO
1h 31m
nonstop
Depart: Thu Jun 1 2017 Return: Wed Jun 7 2017 Trip spans 7 days
Alaska Airlines
Alaska Airlines
SEA
ONT
2h 25m
nonstop
ONT
SEA
2h 30m
nonstop
Depart: Wed Oct 25 2017 Return: Wed Nov 15 2017 Trip spans 22 days
Air France
Air France
TXL
ONT
18h 38m
2 stops
ONT
TXL
21h 30m
2 stops
Depart: Fri Aug 25 2017 Return: Mon Aug 28 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
SEA
ONT
2h 28m
nonstop
ONT
SEA
2h 40m
nonstop
Depart: Tue Sep 5 2017 Return: Tue Sep 19 2017 Trip spans 15 days
Air Canada
Air Canada
CDG
ONT
30h 29m
2 stops
ONT
CDG
27h 10m
2 stops
* 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.

We compile tonnes of data for you
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
$97
Portland
$125
Seattle
$160
Berlin
$516
Dallas
$183
Paris
$539
Destination

Ontario
$97
Airlines Airline reviews

69 travelers who booked a flight from San Francisco to Ontario rated their chosen airlines with an average of 7.0.

Overall
7.1
Boarding
7.1
Crew
7.6
Comfort
7.1
Food
6.5
Entertainment
6.4