Airline codes

Aero Services Executive	W4
MN Aviation	W4
Sayakhat	W7
Eastwind Airlines	W9
KLM Cityhopper	WA
SAN - Servicios Aereos Nationales	WB
Challenge Air Cargo	WE
Rheintalflug	WE
Wideroe - Wideroe's Flyveselskap	WF
Wasaya Airways	WG
China Northwest Airlines	WH
Trade Winds Airlines	WI
U Land Airlines	WI
Air Labrador - Labrador Airways	WJ
Aeroperlas (Apair - Aerolineas Pacificio Atlantico)	WL
Winair - Windward Island Airways International	WM
Southwest Airlines	WN
World Airways	WO
Aloha Island Air	WP
Romavia	WQ
Royal Tongan Airlines ( Friendly Island Airways)	WR
Air Caraibes	WS
Nigeria Airways	WT
Whyalla Airlines	WW
Cityjet	WX
Oman Aviation	WY
Acvilla Air - Aor Romanian Carrier	WZ
Western Air Freight	WZ
Baikal Airlines	X3
Cronus Airlines	X5
Chitaavia	X7
Khors Air	X9
Air Carribean - CLTM Airlines	XC
Carribean Air Transport - CLTM Airlines	XC
KD Air	XC
SouthCentral Air	XE
Vladivostok Air	XF
North American Airlines	XG
Regional Lineas Aereas	XG
Northwest Airlink/Mesaba Airlines	XJ
Compagnie Corse Mediterranee	XK
Country Connection Airlines	XL
Alitalia Express	XM
Australian Air Express	XM
China Xinjiang Airlines	XO
LTE International Airways	XO
Casino Express	XP
Action Airlines	XQ
Sun Express	XQ
Air Wings	XR
KLM Exel	XT
Link Airways of Australia	XU
Nature Island Express	XV
SA Alliance	Y2
Eagle Aviation	Y4
Arax Airways	Y5
Europe Elite	Y6
FS Air Service	Y7
Passaredo Transportes Aereos	Y8
South African Express Airways	YB
Flight West Airlines	YC
Gomelavia	YD
Air Sunshine	YI
National Airways Corporation - NAC	YJ
Horizon Airlines	YK
Kibris Turkish Airlines - KTHY (Cyprus Turkish Airlines)	YK
Air Creebec	YN
Heli Air Monaco	YO
Aero Lloyd	YP
Helicopterservice Euro Air	YQ
Scenic Airlines	YR
Proteus Air System	YS
Skywest Airlines	YT
Dominair - Aerolineas Dominicanas	YU
Mesa Airlines	YV
Air Nostrum	YW
Midwest Express Airlines	YX
Pro Mech Air	Z3
GMG Airlines	Z5
Dnieproavia Aviation Company	Z6
Zimbabwe Express Airlines	Z7
DHL de Guatemala	Z8
Pulkovo Avia	Z8
Aero Zambia	Z9
AccessAir	ZA
Monarch Airlines	ZB
Swazi Airlink	ZC
Cosmos Air	ZE
Aiborne of Sweden	ZF
Air Routing International	ZJ
Teddy Air	ZJ
United Express / Great Lakes Airlines	ZK
Affertair	ZL
Hazelton Airlines	ZL
Eagle Airlines	ZN
Air Saint Thomas	ZP
Ansett New Zealnad	ZQ
Muk Air	ZR
Azzurra Air	ZS
Air Zambezi	ZT
Voronezh Avia	ZT
US Airways Express/Air Midwest	ZV
United Express/Air Wisconsin	ZW
Air BC	ZX
Ade Air Albania	ZY