Currenty ACE's major customers are Air Europa (Spain), Air Berlin (Germany), Travel Service (Hungary), Blue Panorama (Italy) in addition to MALEV.

Owing to the fact that ACE's engineers speak both the Russian and the English languages, understand cultural preferences and are able to offer services at competitive prices, they perform services for several other FSU countries.

ACE's skilled team provides prompt and professional ground technical services to airlines operating to Ferihegy International Airport, Budapest.

Since the hangar's opening in 1992 ACE accommodated aircraft of more than 20 airlines, such as

Base maintenance

Aerosweet Airlines
Alpi Eagles
Air Berlin
Air Europa
Air Kazakstan
Air One
Air Plus
Air Slovakia
Alitalia
Aviogenex
Blue Panorama
CSA Czech Airlines
Futura International Airlines
KrasAir
Lithuanian Airlines
Malev Hungarian Airlines
Royal Air Force (GB)
Sky Airlines
Sky Europe
Trade Air
Transaero Airlines
Travel Service
Turkmenistan Airlines
Ukraine International Airlines

Line maintenance

Aer Lingus
Air Berlin
Air Europa
Air France
British Airways
Cargolux
Channel Express/Jet2.com
CSA Czech Airlines
Delta Air Lines
Deutsche Lufthansa
Egypt Air
El-Al
Eurowings
Finnair
SR Technics EasyTech
HAINAN Airlines
KLM
KLM Cityhopper
LOT Polish Airlines
Lufthansa Cityline
LUXAIR
SWISS Int. Air Lines
UPS
TAP Air Portugal
TAROM
Travel Service Kft.
Travel Service a.s.
Tunis Air
Turkish Airlines
WIND JET S.P.A.