Most flights from/to use the following 12 airports
Barth Airport
Timezone: GMT+1
BBH/EDBH
Braunschweig Wolfsburg Airport
Timezone: GMT+1
BWE/EDVE
Essen Mulheim Airport
Timezone: GMT+1
ESS/EDLE
Neubrandenburg Airport
Timezone: GMT+1
FNB/ETNU
Giebelstadt Army Air Field
Timezone: GMT+1
GHF/ETEU
Geilenkirchen Airport
Timezone: GMT+1
GKE/ETNG
Kitzingen Army Air Field
Timezone: GMT+1
KZG/ETIN
Lahr Airport
Timezone: GMT+1
LHA/EDTL
Oberpfaffenhofen Airport
Timezone: GMT+1
OBF/EDMO
Siegerland Airport
Timezone: GMT+1
SGE/EDGS
Schwerin Parchim Airport
Timezone: GMT+1
SZW/EDOP
Schleswig Airport
Timezone: GMT+1
WBG/ETNS