Passengers check in at the Vienna International Airport in Vienna, Austria, Sept. 11, 2020. According to statistics released by Vienna International Airport, the number of passengers at the airport dropped to 797,716 in August 2020, a 74.7 percent drop on a year-on-year basis. The accumulated passenger volume at the airport in the period January to August 2020 fell by 69.2 percent. (Photos: Georges Schneider/Xinhua)

Passengers check in at the Vienna International Airport in Vienna, Austria, Sept. 11, 2020. According to statistics released by Vienna International Airport, the number of passengers at the airport dropped to 797,716 in August 2020, a 74.7 percent drop on a year-on-year basis. The accumulated passenger volume at the airport in the period January to August 2020 fell by 69.2 percent.

A passenger walks in a terminal building of the Vienna International Airport in Vienna, Austria, Sept. 11, 2020. According to statistics released by Vienna International Airport, the number of passengers at the airport dropped to 797,716 in August 2020, a 74.7 percent drop on a year-on-year basis. The accumulated passenger volume at the airport in the period January to August 2020 fell by 69.2 percent.

Passengers are seen in a terminal building of the Vienna International Airport in Vienna, Austria, Sept. 11, 2020. According to statistics released by Vienna International Airport, the number of passengers at the airport dropped to 797,716 in August 2020, a 74.7 percent drop on a year-on-year basis. The accumulated passenger volume at the airport in the period January to August 2020 fell by 69.2 percent.

Passengers wait for flights at the Vienna International Airport in Vienna, Austria, Sept. 11, 2020. According to statistics released by Vienna International Airport, the number of passengers at the airport dropped to 797,716 in August 2020, a 74.7 percent drop on a year-on-year basis. The accumulated passenger volume at the airport in the period January to August 2020 fell by 69.2 percent.

Passengers check in at the Vienna International Airport in Vienna, Austria, Sept. 11, 2020. According to statistics released by Vienna International Airport, the number of passengers at the airport dropped to 797,716 in August 2020, a 74.7 percent drop on a year-on-year basis. The accumulated passenger volume at the airport in the period January to August 2020 fell by 69.2 percent.

Passengers are seen at the Vienna International Airport in Vienna, Austria, Sept. 11, 2020. According to statistics released by Vienna International Airport, the number of passengers at the airport dropped to 797,716 in August 2020, a 74.7 percent drop on a year-on-year basis. The accumulated passenger volume at the airport in the period January to August 2020 fell by 69.2 percent.