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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: Tue Jan 20 2015 Return: Wed Jan 21 2015 Trip spans 2 days
Frontier
Frontier
ATL
5:05a
ORD
7:05a
2h 00m
nonstop
ORD
2:30a
ATL
4:20a
1h 50m
nonstop
Depart: Wed Dec 24 2014 Return: Thu Dec 25 2014 Trip spans 2 days
Spirit Airlines
Spirit Airlines
MSP
1:16a
ORD
2:45a
1h 29m
nonstop
ORD
4:05a
MSP
5:30a
1h 25m
nonstop
Depart: Wed Jan 7 2015 Return: Thu Jan 8 2015 Trip spans 2 days
Spirit Airlines
Spirit Airlines
DEN
1:00a
ORD
3:26a
2h 26m
nonstop
ORD
4:40p
DEN
7:22p
2h 42m
nonstop
Depart: Tue Jan 6 2015 Return: Thu Jan 8 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: Mon Feb 23 2015 Return: Wed Feb 25 2015 Trip spans 3 days
Frontier
Frontier
IAD
1:55a
ORD
4:00a
2h 05m
nonstop
ORD
7:50a
IAD
9:40a
1h 50m
nonstop
Depart: Tue May 12 2015 Return: Tue May 19 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: Wed Apr 22 2015 Return: Tue Apr 28 2015 Trip spans 7 days
Spirit Airlines
Spirit Airlines
BOS
10:00a
ORD
12:43p
2h 43m
nonstop
ORD
9:38a
BOS
12:04p
2h 26m
nonstop
Depart: Tue May 26 2015 Return: Tue Jun 2 2015 Trip spans 8 days
Spirit Airlines
Spirit Airlines
PHL
2:05a
ORD
4:23a
2h 18m
nonstop
ORD
4:45p
PHL
6:41p
1h 56m
nonstop
Depart: Wed Jun 24 2015 Return: Wed Jul 1 2015 Trip spans 8 days
United
United
TPA
8:40a
ORD
11:29a
2h 49m
nonstop
ORD
10:15a
TPA
12:54p
2h 39m
nonstop
Depart: Sat May 9 2015 Return: Sat May 16 2015 Trip spans 8 days
Spirit Airlines
Spirit Airlines
DFW
12:32p
ORD
2:56p
2h 24m
nonstop
ORD
4:00p
DFW
6:21p
2h 21m
nonstop
Depart: Sun Mar 22 2015 Return: Fri Mar 27 2015 Trip spans 6 days
United
United
CLE
6:24a
ORD
7:59a
1h 35m
nonstop
ORD
11:44a
CLE
1:06p
1h 22m
nonstop
Depart: Wed Jun 17 2015 Return: Tue Jun 23 2015 Trip spans 7 days
Delta
Delta
PBI
4:15a
ORD
10:25a
6h 10m
1 stop
ORD
8:45a
PBI
4:15p
7h 30m
1 stop
Depart: Sun Jun 28 2015 Return: Tue Jun 30 2015 Trip spans 3 days
United
United
CMH
2:55p
ORD
4:28p
1h 33m
nonstop
ORD
10:30a
CMH
11:50a
1h 20m
nonstop
Depart: Sat Apr 25 2015 Return: Sun Apr 26 2015 Trip spans 2 days
Spirit Airlines
Spirit Airlines
LGA
5:55p
ORD
8:13p
2h 18m
nonstop
ORD
1:51a
LGA
4:00a
2h 09m
nonstop
Depart: Sun May 31 2015 Return: Thu Jun 4 2015 Trip spans 5 days
United
United
OMA
10:45a
ORD
12:22p
1h 37m
nonstop
ORD
2:50p
OMA
4:27p
1h 37m
nonstop
Depart: Sun Jun 7 2015 Return: Tue Jun 9 2015 Trip spans 3 days
Spirit Airlines
Spirit Airlines
OAK
4:35a
ORD
8:42a
4h 07m
nonstop
ORD
10:35a
OAK
3:12p
4h 37m
nonstop
Depart: Sun Apr 26 2015 Return: Thu Apr 30 2015 Trip spans 5 days
Frontier
Frontier
SLC
2:45p
ORD
5:50p
3h 05m
nonstop
ORD
11:40a
SLC
3:05p
3h 25m
nonstop
Change your search
Airports
Origin

Kansas City
$87
Oakland
$222
Cleveland
$187
Washington
$105
New York City
$217
Omaha
$218
West Palm Beach
$194
Minneapolis
$81
Atlanta
$78
Orlando
$141
Columbus
$203
Salt Lake City
$225
Denver
$81
Dallas
$177
Tampa
$173
Philadelphia
$157
Boston
$157
Destination

Chicago
$78