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

Book cheap flights to Ontario

(Round-trip)
Depart: Tue Oct 11 2016 Return: Wed Oct 19 2016 Trip spans 9 days
United
United
SFO
ONT
1h 25m
nonstop
ONT
SFO
1h 25m
nonstop
Depart: Sat Oct 15 2016 Return: Tue Oct 18 2016 Trip spans 4 days
Major Airline
Major Airline
SFO
ONT
12h 01m
nonstop
ONT
SFO
5h 20m
nonstop
Depart: Tue Nov 1 2016 Return: Wed Nov 2 2016 Trip spans 2 days
Southwest
Southwest
OAK
ONT
1h 15m
nonstop
ONT
OAK
1h 15m
nonstop
Depart: Sat Oct 22 2016 Return: Fri Oct 28 2016 Trip spans 7 days
Alaska Airlines
Alaska Airlines
SEA
ONT
2h 26m
nonstop
ONT
SEA
2h 40m
nonstop
Depart: Tue Oct 18 2016 Return: Wed Oct 26 2016 Trip spans 9 days
Delta
Delta
SLC
ONT
1h 43m
nonstop
ONT
SLC
1h 46m
nonstop
Depart: Wed Nov 9 2016 Return: Tue Nov 15 2016 Trip spans 7 days
American Airlines
American Airlines
DFW
ONT
3h 15m
nonstop
ONT
DFW
2h 56m
nonstop
Depart: Sat Oct 29 2016 Return: Tue Nov 1 2016 Trip spans 4 days
Major Airline
Major Airline
SFO
ONT
7h 06m
nonstop
ONT
SFO
5h 20m
nonstop
Depart: Tue Nov 1 2016 Return: Sat Nov 5 2016 Trip spans 5 days
United
United
SFO
ONT
1h 24m
nonstop
ONT
SFO
1h 26m
nonstop
Depart: Sat Dec 3 2016 Return: Wed Jan 11 2017 Trip spans 40 days
Southwest
Southwest
OAK
ONT
1h 10m
nonstop
ONT
OAK
1h 15m
nonstop
Depart: Fri Nov 18 2016 Return: Sun Nov 20 2016 Trip spans 3 days
Major Airline
Major Airline
SFO
ONT
8h 20m
nonstop
ONT
SFO
7h 45m
nonstop
Depart: Fri Dec 16 2016 Return: Thu Dec 22 2016 Trip spans 7 days
United
United
SFO
ONT
1h 28m
nonstop
ONT
SFO
1h 29m
nonstop
Depart: Thu Nov 3 2016 Return: Sun Nov 6 2016 Trip spans 4 days
Alaska Airlines
Alaska Airlines
SEA
ONT
2h 32m
nonstop
ONT
SEA
2h 40m
nonstop
Depart: Fri Dec 30 2016 Return: Wed Jan 4 2017 Trip spans 6 days
United
United
SFO
ONT
1h 28m
nonstop
ONT
SFO
1h 18m
nonstop
Depart: Wed Jan 4 2017 Return: Mon Jan 9 2017 Trip spans 6 days
Major Airline
Major Airline
SFO
ONT
12h 00m
nonstop
ONT
SFO
6h 02m
nonstop
Depart: Thu Oct 27 2016 Return: Sun Oct 30 2016 Trip spans 4 days
Southwest
Southwest
OAK
ONT
1h 15m
nonstop
ONT
OAK
1h 30m
nonstop
Depart: Sat Nov 12 2016 Return: Wed Nov 16 2016 Trip spans 5 days
Alaska Airlines
Alaska Airlines
SEA
ONT
2h 30m
nonstop
ONT
SEA
2h 36m
nonstop
Depart: Wed Feb 15 2017 Return: Sat Feb 18 2017 Trip spans 4 days
Major Airline
Major Airline
SFO
ONT
11h 53m
nonstop
ONT
SFO
5h 30m
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 15m
nonstop
Depart: Wed Dec 14 2016 Return: Wed Dec 21 2016 Trip spans 8 days
Alaska Airlines
Alaska Airlines
SEA
ONT
2h 23m
nonstop
ONT
SEA
2h 37m
nonstop
Depart: Sat Nov 19 2016 Return: Sun Nov 20 2016 Trip spans 2 days
United
United
SFO
ONT
1h 25m
nonstop
ONT
SFO
1h 31m
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,
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^ The fares displayed in KAYAK ads found on other sites include all taxes and fees for economy class travel and were found by KAYAK users in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.
Airports
Origin

San Francisco
$117
Seattle
$137
Salt Lake City
$161
Dallas
$177
Oakland
$121
Destination

Ontario
$117
Airlines Airline reviews

98 travelers who booked a flight from San Francisco to Ontario rated their chosen airlines with an average of 7.7.

Overall
7.9
Boarding
8.0
Crew
8.2
Comfort
7.7
Food
7.1
Entertainment
6.6