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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
1:16a
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
8:40a
ORD
11:09a
2h 29m
nonstop
ORD
4:40p
DEN
7:22p
2h 42m
nonstop
Depart: Mon Jan 19 2015 Return: Tue Jan 20 2015 Trip spans 2 days
Spirit Airlines
Spirit Airlines
DFW
1:16a
ORD
3:35a
2h 19m
nonstop
ORD
1:45p
DFW
4:16p
2h 31m
nonstop
Depart: Fri Dec 26 2014 Return: Mon Dec 29 2014 Trip spans 4 days
Frontier
Frontier
CLE
12:20p
ORD
1:45p
1h 25m
nonstop
ORD
2:55p
CLE
4:15p
1h 20m
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: Fri Mar 6 2015 Return: Mon Mar 9 2015 Trip spans 3 days
Frontier
Frontier
IAD
3:30a
ORD
5:35a
2h 05m
nonstop
ORD
8:50a
IAD
10:40a
1h 50m
nonstop
Depart: Tue Mar 3 2015 Return: Wed Mar 4 2015 Trip spans 2 days
Spirit Airlines
Spirit Airlines
OAK
3:50a
ORD
7:58a
4h 08m
nonstop
ORD
10:53a
OAK
3:37p
4h 44m
nonstop
Depart: Tue Feb 24 2015 Return: Wed Feb 25 2015 Trip spans 2 days
Spirit Airlines
Spirit Airlines
ATL
4:20a
ORD
6:25a
2h 05m
nonstop
ORD
6:05a
ATL
8:05a
2h 00m
nonstop
Depart: Wed May 13 2015 Return: Wed May 20 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: Sun Apr 26 2015 Return: Tue Apr 28 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 Jun 3 2015 Return: Mon Jun 8 2015 Trip spans 6 days
Spirit Airlines
Spirit Airlines
HOU
2:00a
ORD
4:38a
2h 38m
nonstop
ORD
3:00p
HOU
5:44p
2h 44m
nonstop
Depart: Sun Dec 28 2014 Return: Wed Jan 7 2015 Trip spans 11 days
Spirit Airlines
Spirit Airlines
LGA
3:30a
ORD
6:08a
2h 38m
nonstop
ORD
12:53a
LGA
3:00a
2h 07m
nonstop
Depart: Mon Jun 1 2015 Return: Sat Jun 6 2015 Trip spans 6 days
United
United
TPA
2:05a
ORD
5:02a
2h 57m
nonstop
ORD
2:05a
TPA
4:39a
2h 34m
nonstop
Depart: Sun May 24 2015 Return: Wed May 27 2015 Trip spans 4 days
Spirit Airlines
Spirit Airlines
BWI
2:30a
ORD
4:32a
2h 02m
nonstop
ORD
4:05a
BWI
5:57a
1h 52m
nonstop
Depart: Sun Jun 28 2015 Return: Tue Jun 30 2015 Trip spans 3 days
United
United
CMH
3:30a
ORD
4:50a
1h 20m
nonstop
ORD
1:30p
CMH
2:46p
1h 16m
nonstop
Depart: Tue May 26 2015 Return: Mon Jun 1 2015 Trip spans 7 days
United
United
OMA
4:00a
ORD
5:33a
1h 33m
nonstop
ORD
6:00p
OMA
7:31p
1h 31m
nonstop
Change your search
Airports
Origin

Kansas City
$87
Oakland
$117
Cleveland
$85
Washington
$105
New York City
$177
Omaha
$208
Baltimore
$197
Minneapolis
$81
Atlanta
$127
Orlando
$141
Columbus
$203
Denver
$81
Dallas
$81
Tampa
$183
Houston
$175
Boston
$157
Destination

Chicago
$81