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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 27 2015 Return: Tue Feb 3 2015 Trip spans 8 days
Frontier
Frontier
ATL
5:05a
ORD
7:05a
2h 00m
nonstop
ORD
1:25a
ATL
3:15a
1h 50m
nonstop
Depart: Thu Dec 25 2014 Return: Wed Dec 31 2014 Trip spans 7 days
Spirit Airlines
Spirit Airlines
MSP
1:50p
ORD
3:22p
1h 32m
nonstop
ORD
4:05a
MSP
5:30a
1h 25m
nonstop
Depart: Wed Jan 7 2015 Return: Tue Jan 13 2015 Trip spans 7 days
Spirit Airlines
Spirit Airlines
DEN
1:00a
ORD
3:26a
2h 26m
nonstop
ORD
6:07a
DEN
8:49a
2h 42m
nonstop
Depart: Sat Jan 3 2015 Return: Thu Jan 8 2015 Trip spans 6 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 Jan 16 2015 Return: Wed Jan 21 2015 Trip spans 6 days
Frontier
Frontier
IAD
3:20a
ORD
5:25a
2h 05m
nonstop
ORD
7:50a
IAD
9:40a
1h 50m
nonstop
Depart: Tue Feb 17 2015 Return: Wed Feb 18 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 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: Tue Apr 21 2015 Return: Wed Apr 22 2015 Trip spans 2 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 May 5 2015 Return: Wed May 6 2015 Trip spans 2 days
Spirit Airlines
Spirit Airlines
BOS
10:00a
ORD
12:43p
2h 43m
nonstop
ORD
9:38a
BOS
12:04p
2h 26m
nonstop
Depart: Mon May 18 2015 Return: Mon May 25 2015 Trip spans 8 days
United
United
TPA
2:05a
ORD
5:02a
2h 57m
nonstop
ORD
10:15a
TPA
12:54p
2h 39m
nonstop
Depart: Sun May 24 2015 Return: Tue May 26 2015 Trip spans 3 days
Spirit Airlines
Spirit Airlines
HOU
2:00a
ORD
4:38a
2h 38m
nonstop
ORD
5:25a
HOU
8:06a
2h 41m
nonstop
Depart: Wed Jun 17 2015 Return: Sat Jun 20 2015 Trip spans 4 days
United
United
CLE
5:35a
ORD
7:01a
1h 26m
nonstop
ORD
11:30a
CLE
12:48p
1h 18m
nonstop
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
1:30p
CMH
2:46p
1h 16m
nonstop
Depart: Mon Apr 27 2015 Return: Fri May 1 2015 Trip spans 5 days
United
United
DFW
4:15p
ORD
6:30p
2h 15m
nonstop
ORD
8:15a
DFW
10:42a
2h 27m
nonstop
Depart: Sun Apr 26 2015 Return: Mon Apr 27 2015 Trip spans 2 days
Frontier
Frontier
SLC
2:45p
ORD
5:50p
3h 05m
nonstop
ORD
11:35a
SLC
3:00p
3h 25m
nonstop
Depart: Mon Jun 29 2015 Return: Tue Jul 7 2015 Trip spans 9 days
Delta
Delta
EWR
2:30p
ORD
7:02p
4h 32m
1 stop
ORD
12:25p
EWR
4:26p
4h 01m
1 stop
Change your search
Airports
Origin

Kansas City
$87
Oakland
$117
Cleveland
$197
Washington
$92
Minneapolis
$81
Atlanta
$78
Orlando
$141
Columbus
$203
Salt Lake City
$225
Newark
$232
Denver
$81
Dallas
$205
Tampa
$173
Philadelphia
$157
Houston
$175
Boston
$157
Destination

Chicago
$78