Frequencies at Chicago O'Hare International Airport

APP

119 MHz

ASOS

135.4 MHz

ATIS

135.4 MHz

CLD

121.6 MHz

CLNC DEL

DEP

125 MHz

GND

121.675 MHz

PTD

126.2 MHz

TWR

126.9 MHz

UNIC

122.95 MHz

UNICOM

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