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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: Sun Feb 8 2015 Return: Mon Feb 9 2015 Trip spans 2 days
Spirit Airlines
Spirit Airlines
MCI
11:25a
ORD
12:55p
1h 30m
nonstop
ORD
9:11a
MCI
10:41a
1h 30m
nonstop
Depart: Sat Feb 7 2015 Return: Mon Feb 9 2015 Trip spans 3 days
Spirit Airlines
Spirit Airlines
MSP
1:50p
ORD
3:22p
1h 32m
nonstop
ORD
4:05a
MSP
5:30a
1h 25m
nonstop
Depart: Mon Feb 2 2015 Return: Tue Feb 3 2015 Trip spans 2 days
American Airlines
American Airlines
DEN
1:17p
ORD
3:35p
2h 18m
nonstop
ORD
2:20a
DEN
5:10a
2h 50m
nonstop
Depart: Fri Mar 13 2015 Return: Wed Mar 25 2015 Trip spans 13 days
Frontier
Frontier
IAD
4:40a
ORD
6:35a
1h 55m
nonstop
ORD
8:35a
IAD
10:20a
1h 45m
nonstop
Depart: Mon Apr 27 2015 Return: Tue May 5 2015 Trip spans 9 days
Frontier
Frontier
ATL
7:05a
ORD
9:05a
2h 00m
nonstop
ORD
11:15a
ATL
1:05p
1h 50m
nonstop
Depart: Mon Apr 6 2015 Return: Wed Apr 8 2015 Trip spans 3 days
Frontier
Frontier
LAS
8:50p
ORD
12:20a
3h 30m
nonstop
ORD
5:30p
LAS
9:20p
3h 50m
nonstop
Depart: Wed Jun 3 2015 Return: Wed Jun 10 2015 Trip spans 8 days
Spirit Airlines
Spirit Airlines
PHL
2:05a
ORD
4:24a
2h 19m
nonstop
ORD
4:50p
PHL
6:46p
1h 56m
nonstop
Depart: Tue Aug 18 2015 Return: Mon Aug 24 2015 Trip spans 7 days
Spirit Airlines
Spirit Airlines
BOS
9:54a
ORD
12:44p
2h 50m
nonstop
ORD
9:40a
BOS
12:08p
2h 28m
nonstop
Depart: Tue Jul 28 2015 Return: Tue Aug 4 2015 Trip spans 8 days
United
United
EWR
2:00a
ORD
4:40a
2h 40m
nonstop
ORD
11:00a
EWR
1:14p
2h 14m
nonstop
Depart: Mon Jun 29 2015 Return: Tue Jun 30 2015 Trip spans 2 days
Delta
Delta
TPA
11:45a
ORD
5:20p
5h 35m
1 stop
ORD
3:00a
TPA
8:00a
5h 00m
1 stop
Depart: Mon Aug 17 2015 Return: Mon Aug 24 2015 Trip spans 8 days
United
United
DFW
1:20p
ORD
3:37p
2h 17m
nonstop
ORD
3:00a
DFW
5:38a
2h 38m
nonstop
Depart: Sun Jul 26 2015 Return: Tue Aug 4 2015 Trip spans 10 days
Delta
Delta
PHX
5:10a
ORD
12:43p
7h 33m
1 stop
ORD
5:10a
PHX
12:40p
7h 30m
1 stop
Change your search
Airports
Origin

Kansas City
$79
Minneapolis
$81
Atlanta
$118
Phoenix
$204
Newark
$177
Denver
$107
Dallas
$197
Tampa
$184
Philadelphia
$157
Washington
$115
Las Vegas
$137
Boston
$157
Destination

Chicago
$79