America
American Airlines - Lan - Mexicana
Europe
British Airways -
Iberia - Finnair - Malev
Asia
JAL -
Cathey Pacific - Royal Jordanian
Oceania
Qantas
American Airlines, British Airways, Canadian Airlines, Cathey Pacific,
and Qantas were the original members when oneworld started in 1999.
Iberia, Lan Chile, and Finnair were added very shortly after.
Royal Jordanian came onboard in 2005, and Malev Hungarian Airlines and Japan Airlines followed in 2007.