Find Cheap Flights from Ontario to North America

Depart
Return
1 adult
Cabin Economy
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
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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 North America

(Round-trip)
Depart: Fri Oct 20 2017 Return: Mon Oct 23 2017 Trip spans 4 days
$83
Select
Frontier
Frontier
ONT
→
DEN
2h 19m
nonstop
DEN
→
ONT
2h 24m
nonstop
Depart: Sat Oct 14 2017 Return: Tue Oct 17 2017 Trip spans 4 days
$125
Select
Multiple Airlines
Multiple Airlines
ONT
→
PDX
2h 22m
nonstop
PDX
→
ONT
4h 04m
1 stop
Depart: Wed Oct 18 2017 Return: Tue Oct 24 2017 Trip spans 7 days
$137
Select
Alaska Airlines
Alaska Airlines
ONT
→
PDX
2h 23m
nonstop
PDX
→
ONT
2h 23m
nonstop
Depart: Sat Oct 21 2017 Return: Wed Oct 25 2017 Trip spans 5 days
$83
Select
Frontier
Frontier
ONT
→
DEN
2h 19m
nonstop
DEN
→
ONT
2h 24m
nonstop
Depart: Thu Oct 19 2017 Return: Tue Oct 24 2017 Trip spans 6 days
$88
Select
Frontier
Frontier
ONT
→
DEN
2h 19m
nonstop
DEN
→
ONT
2h 24m
nonstop
Depart: Sat Oct 21 2017 Return: Sat Oct 28 2017 Trip spans 8 days
$89
Select
Frontier
Frontier
ONT
→
DEN
2h 19m
nonstop
DEN
→
ONT
2h 24m
nonstop
Depart: Tue Oct 24 2017 Return: Wed Nov 1 2017 Trip spans 9 days
$89
Select
Frontier
Frontier
ONT
→
DEN
2h 19m
nonstop
DEN
→
ONT
2h 29m
nonstop
Depart: Wed Oct 25 2017 Return: Wed Nov 1 2017 Trip spans 8 days
$89
Select
Frontier
Frontier
ONT
→
DEN
2h 19m
nonstop
DEN
→
ONT
2h 29m
nonstop
Depart: Sat Oct 21 2017 Return: Tue Oct 24 2017 Trip spans 4 days
$137
Select
Alaska Airlines
Alaska Airlines
ONT
→
PDX
2h 22m
nonstop
PDX
→
ONT
2h 23m
nonstop
Depart: Tue Oct 17 2017 Return: Wed Oct 25 2017 Trip spans 9 days
$90
Select
Frontier
Frontier
ONT
→
DEN
2h 19m
nonstop
DEN
→
ONT
2h 24m
nonstop
Depart: Wed Oct 18 2017 Return: Wed Oct 25 2017 Trip spans 8 days
$90
Select
Frontier
Frontier
ONT
→
DEN
2h 19m
nonstop
DEN
→
ONT
2h 24m
nonstop
Depart: Fri Oct 20 2017 Return: Wed Oct 25 2017 Trip spans 6 days
$93
Select
Frontier
Frontier
ONT
→
DEN
2h 19m
nonstop
DEN
→
ONT
2h 24m
nonstop
Depart: Sat Oct 21 2017 Return: Tue Oct 24 2017 Trip spans 4 days
$93
Select
Frontier
Frontier
ONT
→
DEN
2h 19m
nonstop
DEN
→
ONT
2h 24m
nonstop
Depart: Mon Oct 23 2017 Return: Tue Oct 24 2017 Trip spans 2 days
$93
Select
Frontier
Frontier
ONT
→
DEN
2h 19m
nonstop
DEN
→
ONT
2h 24m
nonstop
Depart: Sat Oct 28 2017 Return: Wed Nov 1 2017 Trip spans 5 days
$95
Select
Frontier
Frontier
ONT
→
DEN
2h 19m
nonstop
DEN
→
ONT
2h 29m
nonstop
Depart: Wed Nov 1 2017 Return: Sat Nov 4 2017 Trip spans 4 days
$95
Select
Frontier
Frontier
ONT
→
DEN
2h 18m
nonstop
DEN
→
ONT
2h 29m
nonstop
Depart: Sat Nov 11 2017 Return: Wed Nov 15 2017 Trip spans 5 days
$95
Select
Frontier
Frontier
ONT
→
DEN
2h 18m
nonstop
DEN
→
ONT
2h 29m
nonstop
Depart: Sat Dec 9 2017 Return: Wed Dec 13 2017 Trip spans 5 days
$95
Select
Frontier
Frontier
ONT
→
DEN
2h 18m
nonstop
DEN
→
ONT
2h 27m
nonstop
Depart: Sat Jan 20 2018 Return: Sat Jan 27 2018 Trip spans 8 days
$95
Select
Frontier
Frontier
ONT
→
DEN
2h 24m
nonstop
DEN
→
ONT
2h 27m
nonstop
Depart: Thu Oct 12 2017 Return: Mon Oct 16 2017 Trip spans 5 days
$96
Select
Frontier
Frontier
ONT
→
DEN
2h 19m
nonstop
DEN
→
ONT
2h 24m
nonstop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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
Ontario
$83
Destination
Portland
$125
Denver
$83