When flying from Chiang Mai to Lebanon, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Most people fly from Chiang Mai (CNX) if they book a flight from Chiang Mai to Lebanon. Chiang Mai is conveniently located just 3.1 km from Chiang Mai’s city centre.
This is defined as Chiang Mai Airport (CNX) and Beirut Airport (BEY). Codes like Beirut Airport are often used to just call airports uniquely.