Listed below are the known Luftwaffe pilots who scored combat victories in both the First World War and the Second World War. One of these was among the very few to become Aces in both World Wars: Theodor "Theo" Osterkamp.

Gerhard "Küken" Hubrich - 12 victories in WW1, 2 unconfirmed victories in WW2 (Lehrgeschwader 2)
Alfred Lindenberger - 12 victories in WW1, 4 victories in WW2 (Jagdgeschwader 300)
Dr. Erich Mix - 3 victories in WW1, 8 victories in WW2 (Jagdgeschwader 1 Oesau)
Theodor "Theo" Osterkamp - 32 victories in WW1 (PLM holder), 6 more in WW2 (Jagdgeschwader 51 Mölders)
Friedrich Vollbracht - 2 victories in WW1, 2 in WW2 (Zerstörergeschwader 2)

Harry von Bülow-Bothkamp - 6 victories in WW1, he may have scored additional ones in WW2 but the sources differ on this matter (Jagdgeschwader 2 Richthofen)