Both QR and EK out of Beirut have a little prayer at the start of every flight (be it during Ramadan or any other time of the year). I have also flown both of those airlines during Ramadan. Muslims are excused from fasting during travel; however, some continue to fast. I am not sure how they cope with those who are eating around them. I have noticed; however, that airlines would announce the end of fasting (Iftar) as it would occur at the point origin so folks who are fasting could eat. So if a flight left Beirut at 4:00 p.m. and iftar was at 6:00 p.m., there would be an announcement 2 hours later on the flight saying that it is time for Iftar. Hope that makes sense (and answers that question with regard to time zones).