Spain
Spain produced a number of biplane fighter aces during the Spanish Civil War between 1936-1939. A number of these pilots also flew combat missions during the Second World War:
| Name | Biplane victories | Total no. of victories | Note |
| Carlos Bayo Alessandri | 11 | 14 | All biplane victories claimed in the Spanish Civil War. |
| Esteban Ibarreche Arriaga | 7 | 9 | All biplane victories claimed in the Spanish Civil War. |
| Andrés García La Calle | 11 | 11 | All victories claimed in the Spanish Civil War. |
| Juan Lario Sanchez | 7 | 34 | All biplane victories claimed in the Spanish Civil War. |
| Joaquín García-Morato y Castaño | 40 | 40 | Top Spanish biplane fighter ace. All biplane victories claimed in the Spanish Civil War. |
| Ángel Salas Larrazábal | 16 | 23 | All biplane victories claimed in the Spanish Civil War. |
| Julio Salvador Díaz-Benjumea | 24 | 26 | All biplane victories claimed in the Spanish Civil War. |
Any additional info regarding Spanish pilots (both Nationalist and Republican) flying combat missions during the Second World War is most welcome!