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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: Wed Jun 3 2015 Trip spans 15 days
American Airlines
American Airlines
LAS
ONT
2h 43m
1 stop
ONT
LAS
4h 53m
1 stop
Depart: Tue Jun 2 2015 Return: Wed Jun 10 2015 Trip spans 9 days
American Airlines
American Airlines
DEN
ONT
4h 22m
1 stop
ONT
DEN
4h 13m
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: Tue May 12 2015 Return: Wed May 20 2015 Trip spans 9 days
Alaska Airlines
Alaska Airlines
PDX
ONT
2h 15m
nonstop
ONT
PDX
2h 19m
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: Mon May 11 2015 Return: Tue May 12 2015 Trip spans 2 days
Delta
Delta
SLC
ONT
1h 47m
nonstop
ONT
SLC
1h 44m
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: Mon May 18 2015 Return: Sat May 23 2015 Trip spans 6 days
United
United
SMF
ONT
3h 31m
1 stop
ONT
SMF
4h 12m
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: 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: Tue May 5 2015 Return: Wed May 6 2015 Trip spans 2 days
US Airways
US Airways
DFW
ONT
13h 22m
1 stop
ONT
DFW
4h 37m
1 stop
Depart: Tue May 19 2015 Return: Tue Jun 2 2015 Trip spans 15 days
Delta
Delta
SAT
ONT
5h 33m
1 stop
ONT
SAT
5h 17m
1 stop
Depart: Fri May 29 2015 Return: Mon Jun 1 2015 Trip spans 4 days
Delta
Delta
STL
ONT
5h 28m
1 stop
ONT
STL
5h 28m
1 stop
Depart: Tue Aug 18 2015 Return: Mon Aug 24 2015 Trip spans 7 days
American Airlines
American Airlines
ORD
ONT
6h 56m
1 stop
ONT
ORD
5h 38m
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: Sat Aug 29 2015 Return: Sun Sep 6 2015 Trip spans 9 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
Airports
Origin

New York
only $335
only $336
Sacramento
$238
Portland
$194
Seattle
$185
San Antonio
$281
Chicago
only $321
only $332
Oakland
$227
San Jose
$227
St Louis
$301
Omaha
$251
San Francisco
$210
Boise
$247
Phoenix
$186
Salt Lake City
$224
Denver
$179
Dallas
$261
Las Vegas
$167
Indianapolis
$337
Destination

Ontario
$167