3 alliances >
https://en.wikipedia.org/wiki/Star_A...and_affiliates
https://en.wikipedia.org/wiki/Oneworld#Member_airlines
https://en.wikipedia.org/wiki/SkyTeam#Member_airlines

also >
alaskaair.com/content/mileage-plan/how-to-earn-miles/airline-partners?lid=mileageplan:how-to-earn:airline-partners-overview
6 (of 14) oneworld - american airlines, british airways, cathay, finnair, LATAM, qantas
4 (of 20) skyteam - air france, aeromexico, KLM, korean air
other - emirates, condor, fiji airways, virgin america, Icelandair, hainan airlines, penair, ravn alaska

in HK there are american express cards that can transfer points to these miles >
cathay, british airways, china airlines, emirates, malaysia airlines, finnair, singapore airlines, virgin atlantic