Passenger traffic at the busier Varna Airport fell 70.2% to 575,034, while passengers at Burgas Airport decreased by 85.3% to 419,718 in the January-October period of 2020, Fraport Group said in a statement on Friday.
Aircraft movements slid 70.1% to 10,109 in the review period.
Cargo handled at the two airports roughly halved to 2,144 t.
In October alone, passenger traffic at the two airports fell 61.3% to 56,415.
Burgas and Varna airports are run by Fraport Twin Star Airport Management under a 35-year concession contract awarded in 2006. Fraport Twin Star Airport Management is a 60/40 joint venture of Fraport and Bulgarian company BM Star.