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

Book cheap flights from Ontario to worldwide

(Round-trip)
Depart: Wed Apr 5 2017 Return: Mon Apr 10 2017 Trip spans 6 days
Major Airline
Major Airline
ONT
SEA
2h 32m
nonstop
SEA
ONT
2h 24m
nonstop
Depart: Fri Apr 21 2017 Return: Sun Apr 23 2017 Trip spans 3 days
Alaska Airlines
Alaska Airlines
ONT
SEA
2h 42m
nonstop
SEA
ONT
2h 27m
nonstop
Depart: Mon Mar 27 2017 Return: Wed Apr 5 2017 Trip spans 10 days
American Airlines
American Airlines
ONT
DFW
2h 53m
nonstop
DFW
ONT
3h 15m
nonstop
Depart: Wed Apr 12 2017 Return: Tue Apr 25 2017 Trip spans 14 days
United
United
ONT
ORD
6h 08m
1 stop
ORD
ONT
8h 03m
1 stop
Depart: Wed Apr 12 2017 Return: Fri Apr 14 2017 Trip spans 3 days
Major Airline
Major Airline
ONT
SEA
2h 42m
nonstop
SEA
ONT
2h 27m
nonstop
Depart: Fri May 19 2017 Return: Mon May 22 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
SEA
2h 38m
nonstop
SEA
ONT
2h 25m
nonstop
Depart: Thu Apr 20 2017 Return: Sun Apr 23 2017 Trip spans 4 days
Major Airline
Major Airline
ONT
SEA
2h 42m
nonstop
SEA
ONT
2h 23m
nonstop
Depart: Wed Apr 5 2017 Return: Tue Apr 18 2017 Trip spans 14 days
Delta
Delta
ONT
EWR
7h 23m
1 stop
EWR
ONT
8h 24m
1 stop
Depart: Mon Apr 24 2017 Return: Wed Apr 26 2017 Trip spans 3 days
Major Airline
Major Airline
ONT
SEA
2h 42m
nonstop
SEA
ONT
2h 24m
nonstop
Depart: Sat Aug 26 2017 Return: Thu Sep 7 2017 Trip spans 13 days
Aeromexico
Aeromexico
ONT
CUN
7h 17m
1 stop
CUN
ONT
9h 23m
1 stop
Depart: Thu Aug 31 2017 Return: Tue Sep 5 2017 Trip spans 6 days
Volaris
Volaris
ONT
CUN
14h 56m
1 stop
CUN
ONT
14h 02m
1 stop
Depart: Mon Apr 10 2017 Return: Tue Apr 18 2017 Trip spans 9 days
American Airlines
American Airlines
ONT
DFW
2h 49m
nonstop
DFW
ONT
3h 15m
nonstop
Depart: Sat Apr 29 2017 Return: Wed May 3 2017 Trip spans 5 days
Major Airline
Major Airline
ONT
SEA
2h 42m
nonstop
SEA
ONT
2h 24m
nonstop
Depart: Tue Jul 4 2017 Return: Sun Jul 9 2017 Trip spans 6 days
Alaska Airlines
Alaska Airlines
ONT
SEA
2h 38m
nonstop
SEA
ONT
2h 26m
nonstop
Depart: Fri Apr 21 2017 Return: Tue Apr 25 2017 Trip spans 5 days
American Airlines
American Airlines
ONT
DFW
2h 49m
nonstop
DFW
ONT
3h 15m
nonstop
Depart: Sun May 7 2017 Return: Tue May 23 2017 Trip spans 17 days
British Airways
British Airways
ONT
AMS
16h 55m
1 stop
AMS
ONT
16h 52m
1 stop
Depart: Tue May 2 2017 Return: Sun May 7 2017 Trip spans 6 days
Major Airline
Major Airline
ONT
SEA
2h 42m
nonstop
SEA
ONT
2h 23m
nonstop
Depart: Sat Aug 19 2017 Return: Mon Aug 28 2017 Trip spans 10 days
Alaska Airlines
Alaska Airlines
ONT
SEA
2h 26m
nonstop
SEA
ONT
2h 30m
nonstop
Depart: Tue Mar 14 2017 Return: Tue Mar 21 2017 Trip spans 8 days
United
United
ONT
ORD
7h 14m
1 stop
ORD
ONT
6h 49m
1 stop
Depart: Sat May 6 2017 Return: Tue May 9 2017 Trip spans 4 days
American Airlines
American Airlines
ONT
DFW
2h 58m
nonstop
DFW
ONT
3h 15m
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
$137
Destination

Cancun
$351
Seattle
$137
Chicago
$206
Amsterdam
$401
Newark
$304
Dallas
$182