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Find Flight Deals from United States to Chicago O'Hare International

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

Book cheap flights to Chicago O'Hare International

(Round-trip)
Depart: Thu Jan 1 2015 Return: Wed Jan 7 2015 Trip spans 7 days
Spirit Airlines
Spirit Airlines
MSP
1:50p
ORD
3:22p
1h 32m
nonstop
ORD
2:52p
MSP
4:19p
1h 27m
nonstop
Depart: Wed Jan 7 2015 Return: Sat Jan 10 2015 Trip spans 4 days
Spirit Airlines
Spirit Airlines
DEN
8:40a
ORD
11:09a
2h 29m
nonstop
ORD
4:40p
DEN
7:22p
2h 42m
nonstop
Depart: Fri Jan 9 2015 Return: Sun Jan 11 2015 Trip spans 3 days
Spirit Airlines
Spirit Airlines
MCI
11:25a
ORD
12:51p
1h 26m
nonstop
ORD
9:11a
MCI
10:41a
1h 30m
nonstop
Depart: Sat Mar 7 2015 Return: Mon Mar 9 2015 Trip spans 2 days
Frontier
Frontier
IAD
3:30a
ORD
5:35a
2h 05m
nonstop
ORD
8:50a
IAD
10:40a
1h 50m
nonstop
Depart: Tue Feb 10 2015 Return: Tue Feb 17 2015 Trip spans 8 days
Spirit Airlines
Spirit Airlines
OAK
3:53a
ORD
8:00a
4h 07m
nonstop
ORD
10:53a
OAK
3:37p
4h 44m
nonstop
Depart: Wed Dec 31 2014 Return: Wed Jan 7 2015 Trip spans 8 days
Spirit Airlines
Spirit Airlines
LGA
4:55p
ORD
7:22p
2h 27m
nonstop
ORD
12:59p
LGA
3:06p
2h 07m
nonstop
Depart: Fri Jan 2 2015 Return: Mon Feb 2 2015 Trip spans 32 days
Multiple Airlines
Multiple Airlines
CLE
12:20p
ORD
1:45p
1h 25m
nonstop
ORD
11:30a
CLE
12:50p
1h 20m
nonstop
Depart: Tue Jun 9 2015 Return: Tue Jun 16 2015 Trip spans 8 days
Spirit Airlines
Spirit Airlines
MCO
1:16p
ORD
4:12p
2h 56m
nonstop
ORD
6:52a
MCO
9:27a
2h 35m
nonstop
Depart: Sat May 30 2015 Return: Mon Jun 1 2015 Trip spans 3 days
Spirit Airlines
Spirit Airlines
BOS
10:00a
ORD
12:43p
2h 43m
nonstop
ORD
9:38a
BOS
12:04p
2h 26m
nonstop
Depart: Wed May 6 2015 Return: Sat May 9 2015 Trip spans 4 days
Spirit Airlines
Spirit Airlines
PHL
2:05a
ORD
4:23a
2h 18m
nonstop
ORD
4:45p
PHL
6:41p
1h 56m
nonstop
Depart: Tue Apr 28 2015 Return: Mon May 4 2015 Trip spans 7 days
Spirit Airlines
Spirit Airlines
HOU
2:30p
ORD
5:05p
2h 35m
nonstop
ORD
5:25a
HOU
8:06a
2h 41m
nonstop
Depart: Sun Apr 12 2015 Return: Sun Apr 19 2015 Trip spans 8 days
Spirit Airlines
Spirit Airlines
DFW
2:16a
ORD
4:35a
2h 19m
nonstop
ORD
4:00p
DFW
6:21p
2h 21m
nonstop
Depart: Mon Apr 27 2015 Return: Wed May 13 2015 Trip spans 17 days
Multiple Airlines
Multiple Airlines
TPA
1:34p
ORD
4:30p
2h 56m
nonstop
ORD
10:15a
TPA
12:50p
2h 35m
nonstop
Depart: Mon May 11 2015 Return: Tue May 19 2015 Trip spans 9 days
Spirit Airlines
Spirit Airlines
BWI
4:55p
ORD
7:02p
2h 07m
nonstop
ORD
5:04p
BWI
6:59p
1h 55m
nonstop
Depart: Fri Jun 26 2015 Return: Sun Jun 28 2015 Trip spans 3 days
United
United
CMH
4:30p
ORD
6:03p
1h 33m
nonstop
ORD
2:00a
CMH
3:14a
1h 14m
nonstop
Depart: Sun Jun 21 2015 Return: Wed Jun 24 2015 Trip spans 4 days
Delta
Delta
EWR
7:00a
ORD
11:14a
4h 14m
1 stop
ORD
6:50a
EWR
12:25p
5h 35m
1 stop
Depart: Sun May 31 2015 Return: Tue Jun 16 2015 Trip spans 17 days
Delta
Delta
SFO
3:00a
ORD
9:39a
6h 39m
1 stop
ORD
5:00a
SFO
2:04p
9h 04m
1 stop
Change your search
Airports
Origin

Kansas City
$87
Oakland
$117
Cleveland
$146
Washington
$105
New York City
$137
San Francisco
$246
Baltimore
$197
Minneapolis
$81
Orlando
$146
Columbus
$224
Newark
$232
Denver
$81
Dallas
$177
Tampa
$183
Philadelphia
$167
Houston
$175
Boston
$157
Destination

Chicago
$81