Find Deals on Flights from Ontario to United States

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 Ontario to United States

(Round-trip)
Depart: Tue May 9 2017 Return: Tue May 16 2017 Trip spans 8 days
United
United
ONT
SFO
1h 30m
nonstop
SFO
ONT
1h 26m
nonstop
Depart: Tue May 2 2017 Return: Thu May 4 2017 Trip spans 3 days
Major Airline
Major Airline
ONT
SFO
6h 15m
nonstop
SFO
ONT
5h 13m
nonstop
Depart: Tue May 2 2017 Return: Wed May 10 2017 Trip spans 9 days
Alaska Airlines
Alaska Airlines
ONT
PDX
2h 20m
nonstop
PDX
ONT
2h 23m
nonstop
Depart: Mon Jul 31 2017 Return: Tue Aug 29 2017 Trip spans 30 days
American Airlines
American Airlines
ONT
DFW
2h 54m
nonstop
DFW
ONT
3h 01m
nonstop
Depart: Tue May 2 2017 Return: Sat Jun 10 2017 Trip spans 40 days
United
United
ONT
SFO
1h 33m
nonstop
SFO
ONT
1h 18m
nonstop
Depart: Thu Apr 27 2017 Return: Tue May 2 2017 Trip spans 6 days
Major Airline
Major Airline
ONT
SFO
5h 41m
nonstop
SFO
ONT
7h 05m
nonstop
Depart: Fri Apr 7 2017 Return: Wed Apr 12 2017 Trip spans 6 days
United
United
ONT
SFO
1h 30m
nonstop
SFO
ONT
1h 26m
nonstop
Depart: Sun Sep 3 2017 Return: Wed Sep 20 2017 Trip spans 18 days
Major Airline
Major Airline
ONT
SFO
8h 08m
nonstop
SFO
ONT
4h 36m
nonstop
Depart: Tue May 16 2017 Return: Mon May 22 2017 Trip spans 7 days
Alaska Airlines
Alaska Airlines
ONT
PDX
2h 18m
nonstop
PDX
ONT
2h 23m
nonstop
Depart: Tue Apr 11 2017 Return: Tue Apr 18 2017 Trip spans 8 days
Delta
Delta
ONT
AUS
5h 17m
1 stop
AUS
ONT
5h 47m
1 stop
Depart: Wed Apr 12 2017 Return: Sat Apr 15 2017 Trip spans 4 days
United
United
ONT
SFO
1h 30m
nonstop
SFO
ONT
1h 26m
nonstop
Depart: Wed May 31 2017 Return: Sun Jun 4 2017 Trip spans 5 days
Alaska Airlines
Alaska Airlines
ONT
PDX
2h 18m
nonstop
PDX
ONT
2h 20m
nonstop
Depart: Wed May 10 2017 Return: Wed May 17 2017 Trip spans 8 days
Major Airline
Major Airline
ONT
PDX
2h 18m
nonstop
PDX
ONT
2h 23m
nonstop
Depart: Thu Jun 1 2017 Return: Sat Jun 10 2017 Trip spans 10 days
United
United
ONT
SFO
1h 30m
nonstop
SFO
ONT
1h 18m
nonstop
Depart: Fri Jun 2 2017 Return: Sat Jun 3 2017 Trip spans 2 days
Alaska Airlines
Alaska Airlines
ONT
PDX
2h 18m
nonstop
PDX
ONT
2h 23m
nonstop
Depart: Wed Sep 27 2017 Return: Sat Sep 30 2017 Trip spans 4 days
Major Airline
Major Airline
ONT
SFO
5h 40m
nonstop
SFO
ONT
5h 59m
nonstop
Depart: Wed Sep 27 2017 Return: Sat Sep 30 2017 Trip spans 4 days
American Airlines
American Airlines
ONT
DFW
3h 04m
nonstop
DFW
ONT
3h 01m
nonstop
Depart: Fri Jun 2 2017 Return: Sun Jun 4 2017 Trip spans 3 days
United
United
ONT
SFO
1h 30m
nonstop
SFO
ONT
1h 26m
nonstop
Depart: Sat Aug 5 2017 Return: Tue Aug 29 2017 Trip spans 25 days
American Airlines
American Airlines
ONT
DFW
4h 30m
1 stop
DFW
ONT
3h 07m
nonstop
Depart: Wed Apr 19 2017 Return: Tue Apr 25 2017 Trip spans 7 days
Major Airline
Major Airline
ONT
SEA
10h 04m
1 stop
SEA
ONT
4h 10m
1 stop
* 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.

We compile tonnes of data for you
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

Ontario
$79
Destination

San Francisco
$79
Portland
$133
Seattle
$144
Austin
$288
Dallas
$183