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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
2:52p
MSP
4:19p
1h 27m
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
4:15a
DFW
6:46a
2h 31m
nonstop
Depart: Fri Jan 9 2015 Return: Sat Jan 10 2015 Trip spans 2 days
Spirit Airlines
Spirit Airlines
MCI
11:25a
ORD
12:51p
1h 26m
nonstop
ORD
9:11a
MCI
10:41a
1h 30m
nonstop
Depart: Wed Feb 18 2015 Return: Mon Feb 23 2015 Trip spans 6 days
Spirit Airlines
Spirit Airlines
TPA
9:20a
ORD
12:12p
2h 52m
nonstop
ORD
3:35a
TPA
6:16a
2h 41m
nonstop
Depart: Sat Feb 28 2015 Return: Fri Mar 6 2015 Trip spans 7 days
Frontier
Frontier
IAD
3:30a
ORD
5:35a
2h 05m
nonstop
ORD
7:50a
IAD
9:40a
1h 50m
nonstop
Depart: Tue Apr 14 2015 Return: Tue Apr 21 2015 Trip spans 8 days
Spirit Airlines
Spirit Airlines
MCO
1:35p
ORD
4:37p
3h 02m
nonstop
ORD
6:52a
MCO
9:27a
2h 35m
nonstop
Depart: Sun Mar 1 2015 Return: Thu Mar 5 2015 Trip spans 5 days
Frontier
Frontier
ATL
5:00a
ORD
7:00a
2h 00m
nonstop
ORD
2:30a
ATL
4:20a
1h 50m
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: Sun Mar 8 2015 Return: Thu Mar 19 2015 Trip spans 11 days
Spirit Airlines
Spirit Airlines
HOU
1:16a
ORD
4:51a
2h 35m
nonstop
ORD
4:17p
HOU
7:00p
2h 43m
nonstop
Depart: Sun Dec 28 2014 Return: Sat Jan 10 2015 Trip spans 14 days
Spirit Airlines
Spirit Airlines
LGA
3:30a
ORD
6:08a
2h 38m
nonstop
ORD
12:53a
LGA
3:00a
2h 07m
nonstop
Depart: Wed May 27 2015 Return: Fri Jun 5 2015 Trip spans 10 days
Spirit Airlines
Spirit Airlines
PHL
2:05a
ORD
4:23a
2h 18m
nonstop
ORD
4:45p
PHL
6:41p
1h 56m
nonstop
Depart: Sun Apr 19 2015 Return: Tue Apr 28 2015 Trip spans 10 days
United
United
CLE
5:35a
ORD
7:01a
1h 26m
nonstop
ORD
1:30p
CLE
2:48p
1h 18m
nonstop
Depart: Tue Apr 28 2015 Return: Tue May 5 2015 Trip spans 8 days
Spirit Airlines
Spirit Airlines
OAK
4:35a
ORD
8:42a
4h 07m
nonstop
ORD
10:35a
OAK
3:12p
4h 37m
nonstop
Depart: Mon May 18 2015 Return: Wed May 20 2015 Trip spans 3 days
Spirit Airlines
Spirit Airlines
IAH
2:30p
ORD
5:05p
2h 35m
nonstop
ORD
3:00p
IAH
5:44p
2h 44m
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
Depart: Mon Jun 29 2015 Return: Wed Jul 29 2015 Trip spans 31 days
JetBlue Airways
JetBlue Airways
DCA
2:00a
ORD
6:46a
4h 46m
1 stop
ORD
3:00a
DCA
7:44a
4h 44m
1 stop
Change your search
Airports
Origin

Kansas City
$87
Oakland
$187
Cleveland
$179
Washington
only $105
only $228
New York City
$177
Omaha
$208
Minneapolis
$81
Atlanta
$148
Orlando
$141
Columbus
$203
Denver
$81
Dallas
$81
Tampa
$97
Philadelphia
$177
Houston
only $195
only $175
Boston
$157
Destination

Chicago
$81