Most flights from/to Chittagong, Comilla, Cox's Bazar use the following 3 airports

Shah Amanat International Airport

Chittagong

Timezone: GMT+6

CGP/VGEG

Comilla Airport

Comilla

Timezone: GMT+6

CLA/VGCM

Cox's Bazar Airport

Cox's Bazar

Timezone: GMT+6

CXB/VGCB