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: Wed Aug 23 2017 Return: Thu Aug 31 2017 Trip spans 9 days
United
United
SFO
ONT
1h 29m
nonstop
ONT
SFO
1h 30m
nonstop
Depart: Sat Sep 23 2017 Return: Thu Sep 28 2017 Trip spans 6 days
Major Airline
Major Airline
SFO
ONT
10h 31m
nonstop
ONT
SFO
11h 56m
nonstop
Depart: Tue Oct 24 2017 Return: Wed Oct 25 2017 Trip spans 2 days
American Airlines
American Airlines
DFW
ONT
3h 01m
nonstop
ONT
DFW
3h 04m
nonstop
Depart: Sat Sep 2 2017 Return: Sat Sep 9 2017 Trip spans 8 days
Alaska Airlines
Alaska Airlines
PDX
ONT
2h 20m
nonstop
ONT
PDX
2h 24m
nonstop
Depart: Mon Sep 11 2017 Return: Mon Sep 18 2017 Trip spans 8 days
Southwest
Southwest
PDX
ONT
2h 10m
nonstop
ONT
PDX
2h 15m
nonstop
Depart: Wed Sep 6 2017 Return: Sat Sep 9 2017 Trip spans 4 days
Delta
Delta
SEA
ONT
4h 25m
1 stop
ONT
SEA
5h 00m
1 stop
Depart: Fri Jul 14 2017 Return: Mon Aug 14 2017 Trip spans 32 days
Aeromexico
Aeromexico
GDL
ONT
3h 02m
nonstop
ONT
GDL
3h 13m
nonstop
Depart: Thu Oct 5 2017 Return: Mon Oct 16 2017 Trip spans 12 days
Volaris
Volaris
GDL
ONT
3h 10m
nonstop
ONT
GDL
3h 11m
nonstop
Depart: Thu Sep 7 2017 Return: Sat Sep 9 2017 Trip spans 3 days
United
United
SFO
ONT
1h 18m
nonstop
ONT
SFO
1h 18m
nonstop
Depart: Wed Oct 18 2017 Return: Tue Oct 24 2017 Trip spans 7 days
Major Airline
Major Airline
PDX
ONT
2h 23m
nonstop
ONT
PDX
2h 22m
nonstop
Depart: Thu Oct 26 2017 Return: Tue Oct 31 2017 Trip spans 6 days
United
United
SFO
ONT
1h 18m
nonstop
ONT
SFO
1h 23m
nonstop
Depart: Tue Aug 22 2017 Return: Fri Aug 25 2017 Trip spans 4 days
United
United
SFO
ONT
1h 29m
nonstop
ONT
SFO
1h 30m
nonstop
Depart: Sun Jul 2 2017 Return: Fri Jul 7 2017 Trip spans 6 days
Major Airline
Major Airline
SFO
ONT
8h 10m
nonstop
ONT
SFO
5h 50m
nonstop
Depart: Tue Sep 12 2017 Return: Sat Sep 16 2017 Trip spans 5 days
American Airlines
American Airlines
DEN
ONT
4h 28m
1 stop
ONT
DEN
4h 17m
1 stop
Depart: Wed Aug 16 2017 Return: Tue Aug 22 2017 Trip spans 7 days
Alaska Airlines
Alaska Airlines
PDX
ONT
2h 15m
nonstop
ONT
PDX
2h 18m
nonstop
Depart: Wed Jul 12 2017 Return: Tue Aug 1 2017 Trip spans 21 days
United
United
SFO
ONT
1h 29m
nonstop
ONT
SFO
1h 30m
nonstop
Depart: Sat Nov 18 2017 Return: Fri Nov 24 2017 Trip spans 7 days
American Airlines
American Airlines
DFW
ONT
3h 01m
nonstop
ONT
DFW
3h 04m
nonstop
Depart: Wed Oct 11 2017 Return: Sun Oct 15 2017 Trip spans 5 days
Major Airline
Major Airline
PDX
ONT
2h 23m
nonstop
ONT
PDX
2h 23m
nonstop
Depart: Fri Nov 10 2017 Return: Tue Nov 14 2017 Trip spans 5 days
United
United
SFO
ONT
1h 18m
nonstop
ONT
SFO
1h 23m
nonstop
Depart: Mon Aug 14 2017 Return: Sun Aug 20 2017 Trip spans 7 days
Aeromexico
Aeromexico
GDL
ONT
3h 02m
nonstop
ONT
GDL
3h 13m
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.

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Airports
Origin

San Francisco
$137
Portland
$149
Seattle
$214
Guadalajara
$236
Denver
$190
Dallas
$171
Destination

Ontario
$137
Airlines Airline reviews

101 travelers who booked a flight from San Francisco to Ontario rated their chosen airlines with an average of 7.3.

Overall
7.5
Boarding
7.5
Crew
7.9
Comfort
7.3
Food
6.8
Entertainment
6.5