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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 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: Mon Jan 5 2015 Return: Wed Jan 7 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 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: Thu Feb 5 2015 Return: Sun Feb 8 2015 Trip spans 4 days
Spirit Airlines
Spirit Airlines
TPA
6:13a
ORD
9:00a
2h 47m
nonstop
ORD
1:50a
TPA
4:33a
2h 43m
nonstop
Depart: Wed Dec 24 2014 Return: Tue Jan 13 2015 Trip spans 21 days
Spirit Airlines
Spirit Airlines
MCO
12:18p
ORD
3:20p
3h 02m
nonstop
ORD
5:06a
MCO
7:43a
2h 37m
nonstop
Depart: Wed Mar 18 2015 Return: Tue Mar 24 2015 Trip spans 7 days
Frontier
Frontier
ATL
7:05a
ORD
9:05a
2h 00m
nonstop
ORD
2:25a
ATL
4:15a
1h 50m
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: 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 3 2015 Return: Wed Jun 10 2015 Trip spans 8 days
Spirit Airlines
Spirit Airlines
IAH
2:00a
ORD
4:38a
2h 38m
nonstop
ORD
3:00p
IAH
5:44p
2h 44m
nonstop
Depart: Tue Jun 23 2015 Return: Wed Jul 1 2015 Trip spans 9 days
Delta
Delta
MIA
5:00a
ORD
10:25a
5h 25m
1 stop
ORD
4:00a
MIA
11:49a
7h 49m
1 stop
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: Mon Jun 8 2015 Return: Wed Jul 15 2015 Trip spans 38 days
Spirit Airlines
Spirit Airlines
DFW
2:05a
ORD
4:28a
2h 23m
nonstop
ORD
4:10p
DFW
6:21p
2h 11m
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: 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
Depart: Sun May 31 2015 Return: Tue Jun 2 2015 Trip spans 3 days
Delta
Delta
SFO
8:35p
ORD
4:32a
7h 57m
1 stop
ORD
8:05a
SFO
2:28p
6h 23m
1 stop
Depart: Mon Apr 27 2015 Return: Tue May 5 2015 Trip spans 9 days
US Airways
US Airways
PHX
8:59p
ORD
12:22a
3h 23m
nonstop
ORD
6:10p
PHX
9:47p
3h 37m
nonstop
Depart: Sun Jun 21 2015 Return: Mon Jun 29 2015 Trip spans 9 days
Delta
Delta
PBI
3:00a
ORD
10:25a
7h 25m
1 stop
ORD
4:00a
PBI
11:50a
7h 50m
1 stop
Change your search
Airports
Origin

Kansas City
$87
Cleveland
$197
Washington
$92
Miami
$184
West Palm Beach
$259
San Francisco
$246
Minneapolis
$81
Atlanta
$138
Orlando
$127
Columbus
$203
Phoenix
$247
Salt Lake City
$225
Newark
$232
Denver
$81
Dallas
$202
Tampa
$97
Philadelphia
$157
Houston
only $175
only $175
Boston
$157
Destination

Chicago
$81