Frequencies at Chicago O'Hare International Airport

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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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