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Find Flight Deals from United States to Ontario

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

Book cheap flights to Ontario

(Round-trip)
Depart: Mon Apr 20 2015 Return: Tue Apr 28 2015 Trip spans 9 days
American Airlines
American Airlines
OAK
ONT
5h 38m
1 stop
ONT
OAK
6h 03m
1 stop
Depart: Wed Apr 22 2015 Return: Tue May 5 2015 Trip spans 14 days
United
United
DEN
ONT
2h 14m
nonstop
ONT
DEN
2h 20m
nonstop
Depart: Sun Apr 19 2015 Return: Sat Apr 25 2015 Trip spans 7 days
United
United
SEA
ONT
4h 47m
1 stop
ONT
SEA
5h 27m
1 stop
Depart: Fri May 15 2015 Return: Sun May 17 2015 Trip spans 3 days
US Airways
US Airways
PHX
ONT
1h 17m
nonstop
ONT
PHX
1h 13m
nonstop
Depart: Wed May 6 2015 Return: Sat May 9 2015 Trip spans 4 days
American Airlines
American Airlines
PDX
ONT
6h 13m
1 stop
ONT
PDX
6h 51m
1 stop
Depart: Thu Apr 23 2015 Return: Sun Apr 26 2015 Trip spans 4 days
United
United
SFO
ONT
1h 26m
nonstop
ONT
SFO
1h 30m
nonstop
Depart: Wed Jun 3 2015 Return: Tue Jun 9 2015 Trip spans 7 days
US Airways
US Airways
SJC
ONT
4h 51m
1 stop
ONT
SJC
5h 17m
1 stop
Depart: Mon Apr 27 2015 Return: Fri May 1 2015 Trip spans 5 days
United
United
SMF
ONT
3h 31m
1 stop
ONT
SMF
3h 05m
1 stop
Depart: Tue Apr 7 2015 Return: Sat Apr 11 2015 Trip spans 5 days
American Airlines
American Airlines
DFW
ONT
3h 15m
nonstop
ONT
DFW
3h 01m
nonstop
Depart: Tue Apr 21 2015 Return: Tue Apr 28 2015 Trip spans 8 days
Delta
Delta
SLC
ONT
1h 51m
nonstop
ONT
SLC
1h 46m
nonstop
Depart: Sat Sep 12 2015 Return: Sat Sep 19 2015 Trip spans 8 days
United
United
ORD
ONT
9h 18m
1 stop
ONT
ORD
8h 02m
1 stop
Depart: Fri Apr 10 2015 Return: Tue Apr 14 2015 Trip spans 5 days
United
United
EWR
ONT
8h 20m
1 stop
ONT
EWR
8h 30m
1 stop
Depart: Fri Apr 17 2015 Return: Sat Apr 25 2015 Trip spans 9 days
United
United
LGA
ONT
8h 26m
1 stop
ONT
LGA
9h 35m
1 stop
Depart: Sat Apr 18 2015 Return: Sat May 2 2015 Trip spans 15 days
United
United
AUS
ONT
6h 35m
1 stop
ONT
AUS
5h 37m
1 stop
Depart: Sat Apr 11 2015 Return: Tue Apr 14 2015 Trip spans 4 days
US Airways
US Airways
MSP
ONT
5h 30m
1 stop
ONT
MSP
5h 14m
1 stop
Depart: Wed Sep 9 2015 Return: Sat Sep 12 2015 Trip spans 4 days
United
United
FLL
ONT
7h 50m
1 stop
ONT
FLL
6h 45m
1 stop
Depart: Sat Sep 26 2015 Return: Sat Oct 3 2015 Trip spans 8 days
United
United
BOS
ONT
8h 59m
1 stop
ONT
BOS
10h 06m
1 stop
Depart: Wed Apr 8 2015 Return: Sat Apr 18 2015 Trip spans 11 days
US Airways
US Airways
MKE
ONT
5h 51m
1 stop
ONT
MKE
5h 39m
1 stop
Depart: Sun May 31 2015 Return: Mon Jun 8 2015 Trip spans 9 days
American Airlines
American Airlines
IND
ONT
6h 05m
1 stop
ONT
IND
5h 42m
1 stop
Depart: Thu Apr 30 2015 Return: Tue May 5 2015 Trip spans 6 days
United
United
MCI
ONT
6h 04m
1 stop
ONT
MCI
5h 11m
1 stop
Airports
Origin

Milwaukee
$334
Kansas City
$340
New York
$311
Sacramento
$239
Portland
$192
Seattle
$185
Chicago
$271
Fort Lauderdale
$331
Austin
$311
Oakland
$160
San Jose
$227
San Francisco
$206
Minneapolis
$331
Phoenix
$188
Salt Lake City
$256
Newark
$311
Denver
$162
Dallas
$244
Boston
$331
Indianapolis
$338
Destination

Ontario
$160