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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 Apr 14 2015 Return: Tue Apr 21 2015 Trip spans 8 days
Frontier
Frontier
AUS
ORD
2h 35m
nonstop
ORD
AUS
2h 45m
nonstop
Depart: Wed Apr 29 2015 Return: Tue May 12 2015 Trip spans 14 days
Frontier
Frontier
IAD
ORD
1h 55m
nonstop
ORD
IAD
1h 40m
nonstop
Depart: Tue May 5 2015 Return: Sat May 9 2015 Trip spans 5 days
Frontier
Frontier
RDU
ORD
2h 00m
nonstop
ORD
RDU
1h 55m
nonstop
Depart: Thu Apr 2 2015 Return: Sat Apr 4 2015 Trip spans 3 days
Spirit Airlines
Spirit Airlines
MCI
ORD
1h 30m
nonstop
ORD
MCI
1h 30m
nonstop
Depart: Wed Apr 15 2015 Return: Thu Apr 16 2015 Trip spans 2 days
Spirit Airlines
Spirit Airlines
HOU
ORD
2h 35m
nonstop
ORD
HOU
2h 42m
nonstop
Depart: Tue Apr 7 2015 Return: Wed Apr 8 2015 Trip spans 2 days
Spirit Airlines
Spirit Airlines
MSP
ORD
1h 28m
nonstop
ORD
MSP
1h 28m
nonstop
Depart: Wed May 20 2015 Return: Tue May 26 2015 Trip spans 7 days
Spirit Airlines
Spirit Airlines
DFW
ORD
2h 22m
nonstop
ORD
DFW
2h 21m
nonstop
Depart: Thu Apr 16 2015 Return: Tue Apr 28 2015 Trip spans 13 days
Spirit Airlines
Spirit Airlines
MSY
ORD
2h 19m
nonstop
ORD
MSY
2h 22m
nonstop
Depart: Sat May 16 2015 Return: Tue May 19 2015 Trip spans 4 days
Spirit Airlines
Spirit Airlines
DEN
ORD
2h 27m
nonstop
ORD
DEN
2h 33m
nonstop
Depart: Tue Apr 21 2015 Return: Wed Apr 22 2015 Trip spans 2 days
Frontier
Frontier
ATL
ORD
2h 00m
nonstop
ORD
ATL
1h 50m
nonstop
Depart: Wed Apr 22 2015 Return: Tue Apr 28 2015 Trip spans 7 days
Frontier
Frontier
PHL
ORD
2h 15m
nonstop
ORD
PHL
1h 55m
nonstop
Depart: Fri Apr 17 2015 Return: Sat Apr 25 2015 Trip spans 9 days
Spirit Airlines
Spirit Airlines
FLL
ORD
3h 15m
nonstop
ORD
FLL
3h 05m
nonstop
Depart: Sat Apr 25 2015 Return: Tue Apr 28 2015 Trip spans 4 days
Spirit Airlines
Spirit Airlines
LGA
ORD
2h 17m
nonstop
ORD
LGA
2h 07m
nonstop
Depart: Wed Apr 8 2015 Return: Wed Apr 29 2015 Trip spans 22 days
Frontier
Frontier
SLC
ORD
3h 05m
nonstop
ORD
SLC
3h 25m
nonstop
Depart: Wed Aug 12 2015 Return: Tue Aug 18 2015 Trip spans 7 days
United
United
IAH
ORD
2h 35m
nonstop
ORD
IAH
2h 45m
nonstop
Depart: Tue Sep 22 2015 Return: Wed Sep 30 2015 Trip spans 9 days
American Airlines
American Airlines
MIA
ORD
3h 22m
nonstop
ORD
MIA
2h 59m
nonstop
Depart: Sat May 23 2015 Return: Sat May 30 2015 Trip spans 8 days
Spirit Airlines
Spirit Airlines
TPA
ORD
2h 46m
nonstop
ORD
TPA
2h 40m
nonstop
Depart: Tue May 26 2015 Return: Sat May 30 2015 Trip spans 5 days
Spirit Airlines
Spirit Airlines
BOS
ORD
2h 49m
nonstop
ORD
BOS
2h 29m
nonstop
Depart: Mon May 11 2015 Return: Sat May 16 2015 Trip spans 6 days
Frontier
Frontier
PHX
ORD
3h 30m
nonstop
ORD
PHX
3h 40m
nonstop
Depart: Sat Mar 28 2015 Return: Tue Mar 31 2015 Trip spans 4 days
United
United
CMH
ORD
1h 32m
nonstop
ORD
CMH
1h 19m
nonstop
Airports
Origin

Kansas City
$79
New York
$117
Raleigh
$78
Fort Lauderdale
$117
Austin
$58
Washington
$58
Miami
$146
Minneapolis
$81
Atlanta
$98
New Orleans
$89
Columbus
$168
Phoenix
$158
Salt Lake City
$128
Denver
$97
Dallas
$81
Tampa
$157
Philadelphia
$98
Houston
only $142
only $79
Boston
$157
Destination

Chicago
$58