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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 Mar 17 2015 Return: Tue Mar 31 2015 Trip spans 15 days
Spirit Airlines
Spirit Airlines
IAH
2:16a
ORD
4:51a
2h 35m
nonstop
ORD
4:17p
IAH
7:00p
2h 43m
nonstop
Depart: Thu Mar 19 2015 Return: Tue Mar 31 2015 Trip spans 13 days
Spirit Airlines
Spirit Airlines
HOU
2:16a
ORD
4:51a
2h 35m
nonstop
ORD
4:17p
HOU
7:00p
2h 43m
nonstop
Depart: Wed Mar 11 2015 Return: Wed Mar 25 2015 Trip spans 15 days
Frontier
Frontier
IAD
4:45a
ORD
6:40a
1h 55m
nonstop
ORD
8:35a
IAD
10:20a
1h 45m
nonstop
Depart: Mon Mar 9 2015 Return: Thu Mar 12 2015 Trip spans 4 days
Spirit Airlines
Spirit Airlines
MSP
2:51p
ORD
4:23p
1h 32m
nonstop
ORD
5:05a
MSP
6:30a
1h 25m
nonstop
Depart: Tue Mar 10 2015 Return: Wed Mar 11 2015 Trip spans 2 days
Spirit Airlines
Spirit Airlines
MCI
12:24p
ORD
1:54p
1h 30m
nonstop
ORD
10:14a
MCI
11:44a
1h 30m
nonstop
Depart: Wed Jun 3 2015 Return: Sat Jun 6 2015 Trip spans 4 days
Spirit Airlines
Spirit Airlines
DFW
2:10a
ORD
4:30a
2h 20m
nonstop
ORD
4:08p
DFW
6:29p
2h 21m
nonstop
Depart: Sat May 16 2015 Return: Tue May 19 2015 Trip spans 4 days
Spirit Airlines
Spirit Airlines
LGA
5:55p
ORD
8:12p
2h 17m
nonstop
ORD
1:53a
LGA
4:00a
2h 07m
nonstop
Depart: Thu Mar 12 2015 Return: Tue Mar 17 2015 Trip spans 6 days
Frontier
Frontier
ATL
6:40a
ORD
8:40a
2h 00m
nonstop
ORD
3:05a
ATL
4:55a
1h 50m
nonstop
Depart: Sat Jul 25 2015 Return: Sat Aug 8 2015 Trip spans 15 days
Frontier
Frontier
RDU
1:15p
ORD
3:15p
2h 00m
nonstop
ORD
9:15a
RDU
11:05a
1h 50m
nonstop
Depart: Mon Aug 24 2015 Return: Thu Aug 27 2015 Trip spans 4 days
American Airlines
American Airlines
TPA
3:15a
ORD
6:06a
2h 51m
nonstop
ORD
4:45a
TPA
7:27a
2h 42m
nonstop
Depart: Wed Aug 19 2015 Return: Sat Aug 29 2015 Trip spans 11 days
Spirit Airlines
Spirit Airlines
BOS
9:54a
ORD
12:44p
2h 50m
nonstop
ORD
9:40a
BOS
12:08p
2h 28m
nonstop
Depart: Sun Sep 27 2015 Return: Tue Oct 6 2015 Trip spans 10 days
Spirit Airlines
Spirit Airlines
PHL
2:00a
ORD
4:15a
2h 15m
nonstop
ORD
4:45p
PHL
6:40p
1h 55m
nonstop
Depart: Mon Sep 21 2015 Return: Sun Sep 27 2015 Trip spans 7 days
United
United
CLE
3:40a
ORD
5:03a
1h 23m
nonstop
ORD
4:30p
CLE
5:48p
1h 18m
nonstop
Change your search
Airports
Origin

Kansas City
$79
New York
$97
Minneapolis
$79
Raleigh
$138
Atlanta
$98
Dallas
$81
Tampa
$145
Cleveland
$187
Philadelphia
$167
Washington
$78
Houston
only $77
only $77
Boston
$157
Destination

Chicago
$77