IATA does internationally recognised coarses for airlines online (prices are resonable and they have exam centre world wide)
www.iata.org
click training
and then click self study
a part time degree is very very difficult in any area (I know many who started and stopped. Full time it takes about 4 years)
Beware the degree mills. Good ranking index is
http://ed.sjtu.edu.cn/ranking.htm
Best go for coarses that form diploma modules that build up into degrees, so at least if you stop for whatever reason (money, parter, time etc) you have some diplomas.
good luck
PS I am also doing part time