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 | Air Force | Note |
| Roberto Alonso Santamaría | 1 | 1 | Rep. | |
| Juan José Armario Álvarez | 1 shared | 1 shared | Rep. | |
| Narciso Bermúdes de Castro | 4 | 4 | Nat. | |
| Nicomedes Calvo Aguilar | 1 | 1 | Rep. | |
| Careaga | 1 | 1 | Nat. | |
| Carlos Colom Moliner | 1 | 1 | Rep. | |
| Ladislao Duarte Espés | 4 | 4 | Rep. | |
| Juan Frutos Rubio | 1 | 3 | Nat. | |
| Jesús García Herguido | 2 | 2 | Rep. | |
| González Guzmán | 1 | 1 | Nat. | |
| Rúiz Jiménez | 1 | 1 | Nat. | |
| A. Martín García | 1 | 1 | Rep. | |
| Meurza | 1 | 1 | Nat. | |
| Álvaro Muñoz López | 1 | 1 | Rep. | |
| Romulo Negrin Mijoilar | 1 | 1 | Rep. | |
| Rafael Peña Dugo | 1 shared | 1 | Rep. | |
| José Riverola Grúas | 1 | 1 | Rep. | |
| Andrés Rodríguez Panadero | 1 shared | 1 shared | Rep. | |
| Fernando Romero Tejero | 3 | 3 | Rep. | |
| Ramón Senra Àlvarez | 4 | 4 | Nat. | |
| Salvador Serra Alorda | 4 | 4 | Nat. | |
| Carlos Serra Pablo-Romero | 1 | 2 | Nat. | |
| Jaime Torn Roca | 3 | 3 | Rep. | |
| Vigueras | 1 probable | 1 probable | Nat. | |
| Francisco Viñals Guarro | 1 | 1 | Rep. |
Any additional info regarding Spanish pilots (both Nationalist and Republican) flying combat missions during the Second World War is most welcome!