Ankara's move comes as PKK terrorist organisation stepped up its activities in the Sulaymaniyah region threatening the security of flights over the region.
Some 2,340 flights have been cancelled at Bremen, Dortmund, Frankfurt, Hamburg, Hanover, Munich and Stuttgart airports due to a 24-hour strike.
Around 300 take-offs and landings with just under 35,000 passengers were originally planned for Wednesday.
The blackout hit as many people began returning to the capital for work and school after the Christmas and New Year break.
More than 4,400 flights worldwide have been grounded due to heavy weather conditions and the coronavirus pandemic as people tried to travel back home after holidays.
Berlin airport's new CEO Aletta von Massenbach has said that there is an urgent need for the injection of a large amount of money to stave off bankruptcy.
Goal is to resume flights for both humanitarian aid and to provide freedom of movement after the Taliban took over the country, one source familiar with the matter tells AFP.
Turkey has said it could provide technical support to the Taliban to operate Hamid Karzai International Airport following exit of foreign troops, but for now, the future of the transport hub remains unclear.
The US says further attempted attacks are expected ahead of the Tuesday deadline for foreign troops to leave, ending America’s longest war.
Military evacuation flights continued, but access to the airport remained difficult for many. Hundreds of Afghans who lacked any papers or clearance for evacuation congregated outside, adding to the chaos as people rushed to leave Kabul.
With most countries worldwide making Covid-19 tests mandatory for passengers travelling by air, some are worsening the already- strained situation by obtaining fake health certificates on the black market.
The coronavirus pandemic has killed over a million people and infected more than 34.5 million worldwide. Here are the developments for October 2:
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