Find Cheap Flights from North America 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 from North America to Ontario

(Round-trip)
Depart: Tue Aug 22 2017 Return: Wed Aug 23 2017 Trip spans 2 days
United
United
SFO
ONT
1h 29m
nonstop
ONT
SFO
1h 30m
nonstop
Depart: Sat Sep 23 2017 Return: Sat Sep 30 2017 Trip spans 8 days
Alaska Airlines
Alaska Airlines
PDX
ONT
2h 20m
nonstop
ONT
PDX
2h 24m
nonstop
Depart: Mon Nov 6 2017 Return: Wed Nov 15 2017 Trip spans 10 days
Major Airline
Major Airline
PDX
ONT
2h 18m
nonstop
ONT
PDX
2h 23m
nonstop
Depart: Wed Aug 30 2017 Return: Thu Sep 7 2017 Trip spans 9 days
Delta
Delta
SLC
ONT
1h 44m
nonstop
ONT
SLC
1h 47m
nonstop
Depart: Wed Aug 30 2017 Return: Mon Sep 4 2017 Trip spans 6 days
American Airlines
American Airlines
DFW
ONT
3h 03m
nonstop
ONT
DFW
2h 56m
nonstop
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: Wed Oct 11 2017 Return: Wed Oct 18 2017 Trip spans 8 days
Alaska Airlines
Alaska Airlines
PDX
ONT
2h 22m
nonstop
ONT
PDX
2h 22m
nonstop
Depart: Mon Oct 9 2017 Return: Wed Oct 11 2017 Trip spans 3 days
United
United
SFO
ONT
1h 18m
nonstop
ONT
SFO
1h 18m
nonstop
Depart: Tue Sep 26 2017 Return: Thu Sep 28 2017 Trip spans 3 days
Major Airline
Major Airline
SFO
ONT
4h 45m
1 stop
ONT
SFO
6h 10m
1 stop
Depart: Tue Oct 10 2017 Return: Wed Oct 25 2017 Trip spans 16 days
Volaris
Volaris
GDL
ONT
3h 10m
nonstop
ONT
GDL
3h 11m
nonstop
Depart: Wed Oct 25 2017 Return: Wed Nov 1 2017 Trip spans 8 days
Alaska Airlines
Alaska Airlines
PDX
ONT
2h 22m
nonstop
ONT
PDX
2h 22m
nonstop
Depart: Wed Oct 11 2017 Return: Sat Oct 14 2017 Trip spans 4 days
United
United
SFO
ONT
1h 18m
nonstop
ONT
SFO
1h 18m
nonstop
Depart: Tue Sep 5 2017 Return: Thu Sep 7 2017 Trip spans 3 days
Delta
Delta
SLC
ONT
1h 55m
nonstop
ONT
SLC
1h 47m
nonstop
Depart: Wed Nov 1 2017 Return: Sat Nov 4 2017 Trip spans 4 days
United
United
SFO
ONT
1h 18m
nonstop
ONT
SFO
1h 18m
nonstop
Depart: Thu Sep 21 2017 Return: Sun Sep 24 2017 Trip spans 4 days
Major Airline
Major Airline
SEA
ONT
2h 32m
1 stop
ONT
SEA
2h 33m
1 stop
Depart: Mon Oct 16 2017 Return: Wed Oct 18 2017 Trip spans 3 days
Delta
Delta
SLC
ONT
1h 44m
nonstop
ONT
SLC
1h 43m
nonstop
Depart: Wed Sep 13 2017 Return: Fri Sep 22 2017 Trip spans 10 days
Alaska Airlines
Alaska Airlines
PDX
ONT
2h 20m
nonstop
ONT
PDX
2h 24m
nonstop
Depart: Tue Nov 7 2017 Return: Thu Nov 9 2017 Trip spans 3 days
United
United
SFO
ONT
1h 14m
nonstop
ONT
SFO
1h 18m
nonstop
Depart: Sat Dec 9 2017 Return: Tue Jan 2 2018 Trip spans 25 days
Southwest
Southwest
AUS
ONT
7h 25m
1 stop
ONT
AUS
5h 55m
1 stop
Depart: Tue Dec 12 2017 Return: Thu Dec 14 2017 Trip spans 3 days
Delta
Delta
SLC
ONT
1h 55m
nonstop
ONT
SLC
1h 47m
nonstop
* 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
$117
Portland
$127
Seattle
$144
Guadalajara
$274
Salt Lake City
$147
Austin
$345
Dallas
$179
Destination

Ontario
$117
Airlines Airline reviews

92 travelers who booked a flight from San Francisco to Ontario rated their chosen airlines with an average of 7.4.

Overall
7.5
Boarding
7.6
Crew
7.9
Comfort
7.5
Food
6.9
Entertainment
6.7