DFW → MLI
MLI → DFW
ORD → MLI
RSW → ORD
ORD → RSW
MLI → ORD
MHT → ORD
ORD → MHT
LHR → ORD
ORD → LHR
PIT → ORD
ORD → PIT
PGD → MLI
MLI → PGD
MIA → ORD
DFW → MIA
ORD → PVD
PIE → MLI
MLI → PIE
IAH → DFW
ORD → IAH
PDX → ORD
DFW → PDX
JFK → ORD
PAP → JFK
ORD → FLL
FLL → PAP
ATL → MLI
MCO → ATL
DTW → MCO
MLI → DTW
ATL → CID
AMS → ATL
ACC → AMS
AMS → ACC
MSP → AMS
CID → MSP
ORD → CID
MCO → ORD
ORD → MCO
CID → ORD
DTW → ORD
AMS → DTW
ORD → MSP