Find Deals on International Flights from 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.
Compare vs. KAYAK all | none
Browse Origins:
Browse Destinations:

Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from Ontario to worldwide

(Round-trip)
Depart: Sat Aug 26 2017 Return: Tue Sep 5 2017 Trip spans 11 days
United
United
ONT
SFO
1h 30m
nonstop
SFO
ONT
1h 29m
nonstop
Depart: Thu Nov 2 2017 Return: Sun Nov 5 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
PDX
2h 23m
nonstop
PDX
ONT
2h 18m
nonstop
Depart: Wed Aug 23 2017 Return: Wed Sep 6 2017 Trip spans 15 days
Delta
Delta
ONT
SLC
1h 45m
nonstop
SLC
ONT
1h 55m
nonstop
Depart: Sat Sep 30 2017 Return: Sat Oct 14 2017 Trip spans 15 days
American Airlines
American Airlines
ONT
DFW
3h 00m
nonstop
DFW
ONT
3h 08m
nonstop
Depart: Sat Sep 2 2017 Return: Tue Sep 5 2017 Trip spans 4 days
United
United
ONT
SFO
1h 30m
nonstop
SFO
ONT
1h 29m
nonstop
Depart: Sat Sep 23 2017 Return: Mon Sep 25 2017 Trip spans 3 days
United
United
ONT
SFO
1h 30m
nonstop
SFO
ONT
1h 29m
nonstop
Depart: Sat Nov 4 2017 Return: Sat Nov 18 2017 Trip spans 15 days
Aeromexico
Aeromexico
ONT
GDL
3h 01m
nonstop
GDL
ONT
3h 14m
nonstop
Depart: Sun Oct 8 2017 Return: Mon Oct 16 2017 Trip spans 9 days
Volaris
Volaris
ONT
GDL
3h 06m
nonstop
GDL
ONT
3h 22m
nonstop
Depart: Sat Oct 14 2017 Return: Mon Oct 16 2017 Trip spans 3 days
United
United
ONT
SFO
1h 30m
nonstop
SFO
ONT
1h 29m
nonstop
Depart: Sat Oct 21 2017 Return: Mon Oct 23 2017 Trip spans 3 days
United
United
ONT
SFO
1h 30m
nonstop
SFO
ONT
1h 29m
nonstop
Depart: Tue Nov 7 2017 Return: Sat Nov 11 2017 Trip spans 5 days
United
United
ONT
SFO
1h 18m
nonstop
SFO
ONT
1h 18m
nonstop
Depart: Sat Nov 18 2017 Return: Mon Nov 20 2017 Trip spans 3 days
United
United
ONT
SFO
1h 23m
nonstop
SFO
ONT
1h 18m
nonstop
Depart: Mon Sep 25 2017 Return: Sat Sep 30 2017 Trip spans 6 days
Alaska Airlines
Alaska Airlines
ONT
PDX
2h 24m
nonstop
PDX
ONT
2h 20m
nonstop
Depart: Tue Aug 29 2017 Return: Thu Aug 31 2017 Trip spans 3 days
Delta
Delta
ONT
SLC
1h 45m
nonstop
SLC
ONT
1h 47m
nonstop
Depart: Sun Oct 29 2017 Return: Sat Nov 4 2017 Trip spans 7 days
American Airlines
American Airlines
ONT
DFW
2h 56m
nonstop
DFW
ONT
3h 08m
nonstop
Depart: Sat Sep 30 2017 Return: Tue Oct 3 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
PDX
2h 24m
nonstop
PDX
ONT
2h 22m
nonstop
Depart: Thu Aug 31 2017 Return: Tue Sep 5 2017 Trip spans 6 days
Delta
Delta
ONT
SLC
1h 46m
nonstop
SLC
ONT
1h 49m
nonstop
Depart: Wed Nov 1 2017 Return: Thu Nov 23 2017 Trip spans 23 days
Hahn Air Systems
Hahn Air Systems
ONT
GDL
3h 20m
nonstop
GDL
ONT
3h 31m
nonstop
Depart: Wed Nov 1 2017 Return: Sat Nov 4 2017 Trip spans 4 days
American Airlines
American Airlines
ONT
DFW
3h 00m
nonstop
DFW
ONT
3h 08m
nonstop
Depart: Wed Oct 4 2017 Return: Sat Oct 7 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
PDX
2h 22m
nonstop
PDX
ONT
2h 23m
nonstop
* 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
$97
Destination

San Francisco
$97
Portland
$149
Guadalajara
$223
Salt Lake City
$167
Dallas
$175