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Find Deals on Flights to Ontario

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

Book cheap flights to Ontario

(Round-trip)
Depart: Sat Sep 19 2015 Return: Tue Sep 22 2015 Trip spans 4 days
United
United
SFO
ONT
1h 27m
nonstop
ONT
SFO
1h 25m
nonstop
Depart: Sat Sep 12 2015 Return: Tue Sep 22 2015 Trip spans 11 days
Alaska Airlines
Alaska Airlines
SEA
ONT
2h 30m
nonstop
ONT
SEA
2h 44m
nonstop
Depart: Tue Aug 11 2015 Return: Wed Aug 26 2015 Trip spans 16 days
American Airlines
American Airlines
DFW
ONT
4h 37m
1 stop
ONT
DFW
4h 35m
1 stop
Depart: Sun Aug 30 2015 Return: Wed Sep 2 2015 Trip spans 4 days
American Airlines
American Airlines
PHX
ONT
1h 19m
nonstop
ONT
PHX
1h 12m
nonstop
Depart: Thu Dec 10 2015 Return: Mon Dec 14 2015 Trip spans 5 days
United
United
DEN
ONT
2h 15m
nonstop
ONT
DEN
2h 05m
nonstop
Depart: Tue Aug 18 2015 Return: Sat Aug 22 2015 Trip spans 5 days
American Airlines
American Airlines
SMF
ONT
5h 31m
1 stop
ONT
SMF
5h 52m
1 stop
Depart: Wed Oct 7 2015 Return: Mon Oct 12 2015 Trip spans 6 days
Alaska Airlines
Alaska Airlines
PDX
ONT
2h 11m
nonstop
ONT
PDX
2h 16m
nonstop
Depart: Sun Sep 13 2015 Return: Tue Sep 15 2015 Trip spans 3 days
American Airlines
American Airlines
SJC
ONT
5h 13m
1 stop
ONT
SJC
5h 55m
1 stop
Depart: Tue Oct 20 2015 Return: Tue Oct 27 2015 Trip spans 8 days
Delta
Delta
SLC
ONT
1h 51m
nonstop
ONT
SLC
1h 41m
nonstop
Depart: Wed Aug 26 2015 Return: Wed Sep 9 2015 Trip spans 15 days
United
United
ORD
ONT
7h 13m
1 stop
ONT
ORD
8h 01m
1 stop
Depart: Thu Aug 20 2015 Return: Tue Aug 25 2015 Trip spans 6 days
American Airlines
American Airlines
OAK
ONT
5h 21m
1 stop
ONT
OAK
5h 59m
1 stop
Depart: Sat Aug 15 2015 Return: Sat Aug 22 2015 Trip spans 8 days
American Airlines
American Airlines
OMA
ONT
5h 50m
1 stop
ONT
OMA
5h 44m
1 stop
Depart: Fri Oct 9 2015 Return: Mon Oct 12 2015 Trip spans 4 days
American Airlines
American Airlines
TPA
ONT
6h 54m
1 stop
ONT
TPA
12h 13m
2 stops
Depart: Sun Sep 6 2015 Return: Fri Sep 18 2015 Trip spans 13 days
United
United
CLT
ONT
7h 24m
1 stop
ONT
CLT
6h 19m
1 stop
Depart: Thu Oct 29 2015 Return: Mon Nov 2 2015 Trip spans 5 days
United
United
AUS
ONT
5h 20m
1 stop
ONT
AUS
5h 03m
1 stop
Depart: Tue Sep 15 2015 Return: Tue Oct 13 2015 Trip spans 29 days
United
United
MCO
ONT
7h 19m
1 stop
ONT
MCO
8h 32m
1 stop
Depart: Tue Sep 22 2015 Return: Wed Sep 23 2015 Trip spans 2 days
American Airlines
American Airlines
SAT
ONT
11h 21m
2 stops
ONT
SAT
10h 36m
2 stops
Depart: Wed Sep 23 2015 Return: Sat Sep 26 2015 Trip spans 4 days
US Airways
US Airways
MSP
ONT
5h 26m
1 stop
ONT
MSP
5h 24m
1 stop
Depart: Sat Jan 23 2016 Return: Sat Jan 30 2016 Trip spans 8 days
United
United
BOS
ONT
9h 38m
1 stop
ONT
BOS
10h 30m
1 stop
Depart: Mon Oct 19 2015 Return: Sun Oct 25 2015 Trip spans 7 days
American Airlines
American Airlines
STL
ONT
5h 53m
1 stop
ONT
STL
8h 52m
2 stops
Airports
Origin

Charlotte
$295
Sacramento
$207
Portland
$222
Seattle
$172
San Antonio
$310
Chicago
$251
Austin
$305
Oakland
$253
San Jose
$233
St Louis
$336
Omaha
$281
San Francisco
$112
Minneapolis
$321
Orlando
$309
Phoenix
$190
Salt Lake City
$236
Denver
$196
Dallas
$179
Tampa
$293
Boston
$329
Destination

Ontario
$112