A two-day strike by pilots of the German national carrier Lufthansa led to the cancellation of a number of flights between Bulgaria and Germany on March 12 and 13.
Flights between Sofia Airport and the German cities of Munich and Frankfurt are affected.
Among the cancelled flights between Sofia and Munich are LH1707, LH1703 and LH1705, as well as the return flights LH1702, LH1704 and LH1706 from the Bavarian city to the Bulgarian capital.
Flights between Sofia Airport and Frankfurt are also cancelled. Flights LH1431, LH1427 and LH1429 from Sofia to the German financial center are affected, as well as return flights LH1426, LH1428 and LH1430 from Frankfurt to Sofia.
Globally, the strike will affect around 600 flights. According to the pilots' and flight attendants' union Vereinigung Cockpit, the company will not be able to operate approximately 300 flights on each of the two days of the protest.
Lufthansa announced that despite the strike, it will try to operate at least half of its scheduled flights.
Up to 60 percent of long-haul routes are expected to be operated as scheduled.
To this end, the airline plans to use larger aircraft and resources from other carriers in the Lufthansa Group that are not participating in the strike.
On Tuesday, the union called a strike for more than 5,000 pilots from Lufthansa, Lufthansa Cargo and Lufthansa CityLine.
Some of the employees are demanding higher pensions, while others are demanding a salary increase.
Exactly a month ago, employees of the German national airline went on strike again due to dissatisfaction with their salaries.