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: Sat May 20 2017 Return: Tue May 23 2017 Trip spans 4 days
United
United
SFO
ONT
1h 26m
nonstop
ONT
SFO
1h 30m
nonstop
Depart: Wed Aug 23 2017 Return: Sat Aug 26 2017 Trip spans 4 days
Major Airline
Major Airline
SFO
ONT
5h 23m
nonstop
ONT
SFO
6h 28m
nonstop
Depart: Wed Aug 23 2017 Return: Wed Sep 20 2017 Trip spans 29 days
Delta
Delta
SLC
ONT
1h 55m
nonstop
ONT
SLC
1h 47m
nonstop
Depart: Sat Jun 10 2017 Return: Tue Jun 13 2017 Trip spans 4 days
American Airlines
American Airlines
PHX
ONT
1h 20m
nonstop
ONT
PHX
1h 15m
nonstop
Depart: Sat May 13 2017 Return: Sat May 20 2017 Trip spans 8 days
Alaska Airlines
Alaska Airlines
PDX
ONT
4h 45m
1 stop
ONT
PDX
2h 18m
nonstop
Depart: Sat May 20 2017 Return: Tue May 23 2017 Trip spans 4 days
Major Airline
Major Airline
SFO
ONT
6h 08m
nonstop
ONT
SFO
5h 42m
nonstop
Depart: Fri Jun 2 2017 Return: Tue Jun 6 2017 Trip spans 5 days
United
United
SFO
ONT
1h 26m
nonstop
ONT
SFO
1h 30m
nonstop
Depart: Sat Jun 3 2017 Return: Mon Jun 5 2017 Trip spans 3 days
United
United
SFO
ONT
1h 26m
nonstop
ONT
SFO
1h 30m
nonstop
Depart: Tue Sep 12 2017 Return: Wed Sep 13 2017 Trip spans 2 days
Delta
Delta
SLC
ONT
1h 44m
nonstop
ONT
SLC
1h 47m
nonstop
Depart: Mon Oct 23 2017 Return: Fri Oct 27 2017 Trip spans 5 days
Major Airline
Major Airline
SFO
ONT
7h 01m
nonstop
ONT
SFO
9h 05m
nonstop
Depart: Sat Oct 7 2017 Return: Sat Oct 14 2017 Trip spans 8 days
American Airlines
American Airlines
PHX
ONT
1h 19m
nonstop
ONT
PHX
1h 21m
nonstop
Depart: Wed Sep 20 2017 Return: Wed Sep 27 2017 Trip spans 8 days
Delta
Delta
SLC
ONT
1h 44m
nonstop
ONT
SLC
1h 47m
nonstop
Depart: Tue Sep 26 2017 Return: Sat Sep 30 2017 Trip spans 5 days
Delta
Delta
SLC
ONT
1h 55m
nonstop
ONT
SLC
1h 42m
nonstop
Depart: Sat May 27 2017 Return: Mon May 29 2017 Trip spans 3 days
American Airlines
American Airlines
PHX
ONT
1h 19m
nonstop
ONT
PHX
1h 11m
nonstop
Depart: Sun Jul 2 2017 Return: Tue Jul 4 2017 Trip spans 3 days
United
United
SFO
ONT
1h 29m
nonstop
ONT
SFO
1h 25m
nonstop
Depart: Wed Aug 9 2017 Return: Wed Aug 16 2017 Trip spans 8 days
Major Airline
Major Airline
SFO
ONT
5h 23m
nonstop
ONT
SFO
8h 47m
nonstop
Depart: Tue Jun 6 2017 Return: Sat Jun 10 2017 Trip spans 5 days
Alaska Airlines
Alaska Airlines
PDX
ONT
2h 20m
nonstop
ONT
PDX
2h 18m
nonstop
Depart: Wed Jul 12 2017 Return: Tue Jul 18 2017 Trip spans 7 days
United
United
SFO
ONT
1h 29m
nonstop
ONT
SFO
1h 30m
nonstop
Depart: Wed May 17 2017 Return: Sat May 20 2017 Trip spans 4 days
Delta
Delta
SLC
ONT
1h 47m
nonstop
ONT
SLC
1h 48m
nonstop
Depart: Wed Jul 26 2017 Return: Sat Jul 29 2017 Trip spans 4 days
American Airlines
American Airlines
PHX
ONT
1h 17m
nonstop
ONT
PHX
1h 15m
nonstop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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.

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
$199
Phoenix
$163
Salt Lake City
$149
Destination

Ontario
$117
Airlines Airline reviews

90 travelers who booked a flight from San Francisco to Ontario rated their chosen airlines with an average of 7.1.

Overall
7.2
Boarding
7.2
Crew
7.5
Comfort
7.2
Food
6.5
Entertainment
6.3