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: Tue Oct 24 2017 Return: Thu Nov 2 2017 Trip spans 10 days
Frontier
Frontier
DEN
ONT
2h 24m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Sat Jan 27 2018 Return: Sat Feb 3 2018 Trip spans 8 days
United
United
DEN
ONT
2h 23m
nonstop
ONT
DEN
2h 15m
nonstop
Depart: Wed Jan 10 2018 Return: Tue Jan 16 2018 Trip spans 7 days
Multiple Airlines
Multiple Airlines
PDX
ONT
5h 26m
1 stop
ONT
PDX
2h 30m
nonstop
Depart: Wed Oct 25 2017 Return: Thu Nov 2 2017 Trip spans 9 days
Frontier
Frontier
DEN
ONT
2h 24m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Tue Oct 31 2017 Return: Tue Nov 7 2017 Trip spans 8 days
Frontier
Frontier
DEN
ONT
2h 24m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Wed Nov 1 2017 Return: Sat Dec 9 2017 Trip spans 39 days
Frontier
Frontier
DEN
ONT
2h 29m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Sun Dec 3 2017 Return: Sat Dec 9 2017 Trip spans 7 days
Frontier
Frontier
DEN
ONT
2h 29m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Thu Dec 7 2017 Return: Sun Dec 10 2017 Trip spans 4 days
Frontier
Frontier
DEN
ONT
2h 29m
nonstop
ONT
DEN
2h 24m
nonstop
Depart: Sat Oct 28 2017 Return: Sat Nov 4 2017 Trip spans 8 days
Frontier
Frontier
DEN
ONT
2h 24m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Tue Oct 31 2017 Return: Sat Nov 4 2017 Trip spans 5 days
Frontier
Frontier
DEN
ONT
2h 24m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Wed Nov 1 2017 Return: Wed Nov 8 2017 Trip spans 8 days
Frontier
Frontier
DEN
ONT
2h 29m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Sat Nov 4 2017 Return: Tue Nov 7 2017 Trip spans 4 days
Frontier
Frontier
DEN
ONT
2h 29m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Sat Nov 4 2017 Return: Tue Nov 7 2017 Trip spans 4 days
Frontier
Frontier
DEN
ONT
2h 29m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Tue Nov 7 2017 Return: Tue Nov 14 2017 Trip spans 8 days
Frontier
Frontier
DEN
ONT
2h 29m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Wed Nov 8 2017 Return: Wed Nov 15 2017 Trip spans 8 days
Frontier
Frontier
DEN
ONT
2h 29m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Sat Nov 11 2017 Return: Tue Nov 14 2017 Trip spans 4 days
Frontier
Frontier
DEN
ONT
2h 29m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Wed Nov 15 2017 Return: Tue Nov 28 2017 Trip spans 14 days
Frontier
Frontier
DEN
ONT
2h 29m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Thu Nov 23 2017 Return: Tue Nov 28 2017 Trip spans 6 days
Frontier
Frontier
DEN
ONT
2h 29m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Sat Dec 2 2017 Return: Mon Dec 4 2017 Trip spans 3 days
Frontier
Frontier
DEN
ONT
2h 29m
nonstop
ONT
DEN
2h 18m
nonstop
Depart: Sat Dec 2 2017 Return: Mon Dec 4 2017 Trip spans 3 days
Frontier
Frontier
DEN
ONT
2h 29m
nonstop
ONT
DEN
2h 18m
nonstop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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

Portland
$125
Denver
$67
Destination

Ontario
$67
Airlines Airline reviews

19 travelers who booked a flight from Denver to Ontario rated their chosen airlines with an average of 7.0.

Overall
7.4
Boarding
7.2
Crew
7.7
Comfort
7.4
Food
6.4
Entertainment
6.3