Commercial flights in Bulgaria went up to 2,457 in April from 2,071 in March, Eurostat said on Wednesday.
On an annual comparison basis, Bulgaria's commercial flights increased by 164% in April, EU's statistical office said in a statement.
The busiest Bulgarian airport in April was Sofia Airport, with 2,189 commercial flights, marking an annual increase of 146% and a monthly increase of 16%.
The coastal airports in the cities of Varna and Burgas followed with 326 and 56 flights, respectively. Varna Airport showed a 379% annual growth in the number of its flights in April and a 27% increase on a monthly comparison basis. Burgas Airport flights rose by 155% year-on-year and were 167% higher compared to March.
The least busy airport in the review month was Plovdiv Airpot, with only four flights, the same as its number of flights a year earlier and down 71% month-on-month.
EU's air transport industry showed no clear signs of recovery in the first four months of 2021 compared to the pre-pandemic 2019, the bloc's statistical office noted in its statement.
Eurostat's statement is based on commercial air flight data by Eurocontrol, a pan-European, civil-military organisation dedicated to supporting European aviation. The data includes scheduled and non-scheduled commercial air flights performed under Instrument Flight Rules (IFR).