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: Fri Sep 8 2017 Return: Mon Sep 11 2017 Trip spans 4 days
United
United
SFO
ONT
1h 29m
nonstop
ONT
SFO
1h 30m
nonstop
Depart: Thu Sep 7 2017 Return: Mon Sep 11 2017 Trip spans 5 days
Delta
Delta
SLC
ONT
1h 55m
nonstop
ONT
SLC
1h 46m
nonstop
Depart: Sat Sep 9 2017 Return: Sun Sep 10 2017 Trip spans 2 days
American Airlines
American Airlines
DFW
ONT
5h 11m
1 stop
ONT
DFW
2h 56m
nonstop
Depart: Wed Sep 6 2017 Return: Sun Sep 10 2017 Trip spans 5 days
Multiple Airlines
Multiple Airlines
SEA
ONT
4h 46m
1 stop
ONT
SEA
2h 33m
nonstop
Depart: Fri Sep 8 2017 Return: Sun Sep 10 2017 Trip spans 3 days
Alaska Airlines
Alaska Airlines
SEA
ONT
2h 31m
nonstop
ONT
SEA
2h 33m
nonstop
Depart: Fri Sep 22 2017 Return: Sun Sep 24 2017 Trip spans 3 days
United
United
SFO
ONT
1h 29m
nonstop
ONT
SFO
1h 36m
nonstop
Depart: Tue Sep 12 2017 Return: Thu Sep 14 2017 Trip spans 3 days
Delta
Delta
SLC
ONT
1h 47m
nonstop
ONT
SLC
1h 46m
nonstop
Depart: Fri Sep 8 2017 Return: Sun Sep 10 2017 Trip spans 3 days
American Airlines
American Airlines
DFW
ONT
3h 02m
nonstop
ONT
DFW
2h 56m
nonstop
Depart: Sat Sep 16 2017 Return: Sun Sep 17 2017 Trip spans 2 days
Delta
Delta
SLC
ONT
1h 47m
nonstop
ONT
SLC
1h 46m
nonstop
Depart: Sat Sep 9 2017 Return: Tue Sep 19 2017 Trip spans 11 days
United
United
DEN
ONT
2h 20m
nonstop
ONT
DEN
2h 17m
nonstop
Depart: Thu Sep 7 2017 Return: Sat Sep 9 2017 Trip spans 3 days
American Airlines
American Airlines
SJC
ONT
5h 33m
1 stop
ONT
SJC
5h 51m
1 stop
Depart: Fri Sep 22 2017 Return: Mon Sep 25 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
PDX
ONT
2h 20m
nonstop
ONT
PDX
2h 24m
nonstop
Depart: Fri Sep 8 2017 Return: Mon Sep 11 2017 Trip spans 4 days
Delta
Delta
DAL
ONT
11h 22m
2 stops
ONT
DAL
12h 37m
2 stops
Depart: Thu Sep 21 2017 Return: Tue Sep 26 2017 Trip spans 6 days
Multiple Airlines
Multiple Airlines
ORD
ONT
8h 43m
1 stop
ONT
ORD
8h 08m
1 stop
Depart: Tue Sep 26 2017 Return: Wed Sep 27 2017 Trip spans 2 days
United
United
DEN
ONT
2h 20m
nonstop
ONT
DEN
2h 17m
nonstop
Depart: Fri Sep 22 2017 Return: Sun Sep 24 2017 Trip spans 3 days
Delta
Delta
SLC
ONT
1h 47m
nonstop
ONT
SLC
1h 46m
nonstop
Depart: Thu Sep 7 2017 Return: Mon Sep 11 2017 Trip spans 5 days
United
United
PDX
ONT
5h 21m
1 stop
ONT
PDX
4h 00m
1 stop
Depart: Thu Aug 31 2017 Return: Sun Sep 3 2017 Trip spans 4 days
American Airlines
American Airlines
DFW
ONT
5h 05m
1 stop
ONT
DFW
3h 01m
nonstop
Depart: Tue Sep 26 2017 Return: Thu Sep 28 2017 Trip spans 3 days
United
United
PDX
ONT
4h 04m
1 stop
ONT
PDX
4h 00m
1 stop
Depart: Thu Sep 7 2017 Return: Sat Sep 9 2017 Trip spans 3 days
Multiple Airlines
Multiple Airlines
ATL
ONT
7h 57m
1 stop
ONT
ATL
6h 47m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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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Airports
Origin

San Francisco
$157
Portland
$200
Seattle
$179
Chicago
$226
Atlanta
$280
Denver
$187
Salt Lake City
$167
Dallas
only $168
only $184
San Jose
$190
Destination

Ontario
$157
Airlines Airline reviews

169 travelers who booked a flight from San Francisco to Ontario rated their chosen airlines with an average of 7.8.

Overall
8.0
Boarding
8.0
Crew
8.3
Comfort
7.9
Food
7.3
Entertainment
7.0