In the Name of Allah, The Most Gracious, Most Merciful

Question:

 My best friend has always dreamt of working as a flight attendant. The problem is that he has to serve alcohol to passengers. I want to know if the salary he's going to get from this work is a dirty money "mal haram" or "mal halal"

Answer:

 Dear brother,
 There is no doubt that the salary would be haram. In fact, I would advise him to search for another job even if he doesn't have to serve alcohol.
 Best regards

Praise be to Allah, the Lord of Creations