Flying Turkish Airlines Economy (X) on Friday MIA/IST/PRG returning 6/5 BUD/IST/MIA all booked on one ticket through United Airlines. It seems that all of the dry flights are either to Muslim countries or domestic from IST. Am I understanding that correctly? Mostly I'd like to have a drink on my MIA/IST flight to help me sleep as much of the way as possible. Also do they accept credit cards or do I need to carry some cash for drinks?