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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: Wed May 20 2015 Return: Tue Jun 2 2015 Trip spans 14 days
American Airlines
American Airlines
LAS
ONT
2h 43m
1 stop
ONT
LAS
5h 25m
1 stop
Depart: Tue May 19 2015 Return: Wed May 27 2015 Trip spans 9 days
US Airways
US Airways
DEN
ONT
6h 48m
1 stop
ONT
DEN
4h 10m
1 stop
Depart: Sat May 16 2015 Return: Sat May 23 2015 Trip spans 8 days
United
United
SEA
ONT
5h 16m
1 stop
ONT
SEA
6h 54m
1 stop
Depart: Fri May 8 2015 Return: Sun May 10 2015 Trip spans 3 days
American Airlines
American Airlines
PHX
ONT
1h 17m
nonstop
ONT
PHX
1h 13m
nonstop
Depart: Sat May 23 2015 Return: Tue May 26 2015 Trip spans 4 days
United
United
SFO
ONT
1h 25m
nonstop
ONT
SFO
1h 27m
nonstop
Depart: Wed Sep 2 2015 Return: Wed Sep 9 2015 Trip spans 8 days
American Airlines
American Airlines
PDX
ONT
4h 36m
1 stop
ONT
PDX
2h 11m
nonstop
Depart: Wed May 27 2015 Return: Wed Jun 3 2015 Trip spans 8 days
American Airlines
American Airlines
SJC
ONT
5h 13m
1 stop
ONT
SJC
5h 15m
1 stop
Depart: Tue Aug 11 2015 Return: Tue Aug 18 2015 Trip spans 8 days
American Airlines
American Airlines
OAK
ONT
4h 52m
1 stop
ONT
OAK
5h 55m
1 stop
Depart: Sun May 24 2015 Return: Sat Jun 6 2015 Trip spans 14 days
United
United
BOI
ONT
7h 11m
1 stop
ONT
BOI
6h 54m
1 stop
Depart: Sat Jun 13 2015 Return: Sun Jun 21 2015 Trip spans 9 days
United
United
SMF
ONT
3h 43m
1 stop
ONT
SMF
3h 37m
1 stop
Depart: Thu Oct 8 2015 Return: Tue Oct 13 2015 Trip spans 6 days
Delta
Delta
OMA
ONT
6h 46m
1 stop
ONT
OMA
4h 33m
1 stop
Depart: Sat May 9 2015 Return: Mon May 11 2015 Trip spans 3 days
American Airlines
American Airlines
DFW
ONT
13h 20m
1 stop
ONT
DFW
4h 32m
1 stop
Depart: Fri Sep 18 2015 Return: Sun Sep 20 2015 Trip spans 3 days
Delta
Delta
SLC
ONT
1h 49m
nonstop
ONT
SLC
1h 46m
nonstop
Depart: Fri May 29 2015 Return: Tue Jun 2 2015 Trip spans 5 days
American Airlines
American Airlines
ORD
ONT
6h 07m
1 stop
ONT
ORD
7h 57m
1 stop
Depart: Wed Sep 23 2015 Return: Mon Sep 28 2015 Trip spans 6 days
Delta
Delta
MDW
ONT
10h 34m
2 stops
ONT
MDW
12h 49m
2 stops
Depart: Wed Aug 26 2015 Return: Tue Sep 1 2015 Trip spans 7 days
Delta
Delta
JFK
ONT
9h 27m
1 stop
ONT
JFK
8h 54m
1 stop
Depart: Tue Sep 15 2015 Return: Sat Sep 19 2015 Trip spans 5 days
United
United
LGA
ONT
8h 10m
1 stop
ONT
LGA
8h 55m
1 stop
Depart: Tue Jul 14 2015 Return: Sat Jul 18 2015 Trip spans 5 days
US Airways
US Airways
IND
ONT
5h 42m
1 stop
ONT
IND
7h 30m
1 stop
Depart: Sat Aug 22 2015 Return: Mon Aug 24 2015 Trip spans 3 days
American Airlines
American Airlines
FLL
ONT
7h 12m
1 stop
ONT
FLL
7h 02m
1 stop
Depart: Tue May 12 2015 Return: Sat May 23 2015 Trip spans 12 days
US Airways
US Airways
CMH
ONT
7h 00m
1 stop
ONT
CMH
8h 04m
1 stop
Airports
Origin

New York
only $335
only $335
Sacramento
$247
Portland
$226
Seattle
$185
Chicago
only $311
only $332
Fort Lauderdale
$337
Oakland
$227
San Jose
$227
Omaha
$251
San Francisco
$210
Boise
$247
Columbus
$349
Phoenix
$186
Salt Lake City
$270
Denver
$179
Dallas
$263
Las Vegas
$167
Indianapolis
$337
Destination

Ontario
$167