Lanterns have been widely released during Loi Krathong festival. According to Notice to Airmen (NOTAM) of last year, there were 16 issues for 1,454 lanterns in 2017, while 53 issues for 7,265 lanterns were reported in 2016. The number of lanterns reduced for 5,811, even though, 80 lanterns were reported and not included in NOTAM. From January to June of this year, 540 lanterns were reported. For the festival of this year, 15-29 November 2018, we estimated to accommodate increasing flights from 42,966 to 41,118 flights of last year, equivalent to an increase of 4.5%. The most clouded airport is Suvarnabhumi with 15,154 flights or 1,010 flights a day, while 11,938 flights of 795 flights a day at Don Mueang Airport, 3,558 flights or 237 flights a day at Chiang Mai Airport, 1,161 flights or 77 flights a day at Udon Thani Airport and 954 flights or 63 flights a day at Mae Fah Luang Chiang Rai Airport. AEROTHAI has prepared air traffic management measure to protect aircraft and passengers from the danger of lanterns launched into the air during the festival. All release of lanterns are required to ask the permission and inform the relevant details to the Civil Aviation Authority of Thailand.