The YA-10 had an additional fly-off in 1974 against the Ling-Temco-Vought A-7D Corsair II, the principal USAF attack aircraft at the time, in order to prove the need for a new attack aircraft.
Edina izdelana izvedenka je enosedežnik A-10A, le en primerek je bil kasneje predelan v dvosedežnika A-10B.