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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 Feb 3 2015 Return: Thu Feb 5 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: Wed Apr 1 2015 Return: Tue Apr 7 2015 Trip spans 7 days
Spirit Airlines
Spirit Airlines
MSP
2:17a
ORD
3:45a
1h 28m
nonstop
ORD
5:05a
MSP
6:30a
1h 25m
nonstop
Depart: Tue Apr 21 2015 Return: Sat Apr 25 2015 Trip spans 5 days
Frontier
Frontier
ATL
6:00a
ORD
8:00a
2h 00m
nonstop
ORD
3:30a
ATL
5:20a
1h 50m
nonstop
Depart: Sun May 24 2015 Return: Tue May 26 2015 Trip spans 3 days
Frontier
Frontier
IAD
3:35a
ORD
5:40a
2h 05m
nonstop
ORD
7:55a
IAD
9:45a
1h 50m
nonstop
Depart: Sun Jul 26 2015 Return: Tue Aug 4 2015 Trip spans 10 days
United
United
MCI
1:15a
ORD
2:42a
1h 27m
nonstop
ORD
8:05a
MCI
9:33a
1h 28m
nonstop
Depart: Wed Jul 8 2015 Return: Tue Jul 14 2015 Trip spans 7 days
United
United
BOS
2:00a
ORD
4:53a
2h 53m
nonstop
ORD
2:00a
BOS
4:10a
2h 10m
nonstop
Depart: Tue Jul 7 2015 Return: Wed Jul 15 2015 Trip spans 9 days
Spirit Airlines
Spirit Airlines
BOS
9:54a
ORD
12:44p
2h 50m
nonstop
ORD
9:40a
BOS
12:08p
2h 28m
nonstop
Depart: Sat Jul 11 2015 Return: Tue Jul 14 2015 Trip spans 4 days
Spirit Airlines
Spirit Airlines
DEN
2:30a
ORD
4:57a
2h 27m
nonstop
ORD
6:55a
DEN
9:25a
2h 30m
nonstop
Depart: Tue Jul 28 2015 Return: Tue Aug 4 2015 Trip spans 8 days
United
United
HOU
8:20a
ORD
11:08a
2h 48m
nonstop
ORD
4:30p
HOU
7:08p
2h 38m
nonstop
Depart: Mon Jul 13 2015 Return: Wed Jul 15 2015 Trip spans 3 days
American Airlines
American Airlines
DFW
1:35a
ORD
3:52a
2h 17m
nonstop
ORD
1:00a
DFW
3:16a
2h 16m
nonstop
Depart: Sat Jul 18 2015 Return: Tue Jul 28 2015 Trip spans 11 days
United
United
DFW
10:45a
ORD
1:02p
2h 17m
nonstop
ORD
3:00a
DFW
5:38a
2h 38m
nonstop
Change your search
Airports
Origin

Kansas City
$79
Minneapolis
$97
Atlanta
$98
Denver
$172
Dallas
$187
Washington
$125
Houston
$175
Boston
$161
Destination

Chicago
$79