Skeyes, the Belgian air traffic control authority stated in the statement that "forced to allow traffic traffic" from Tuesday 10 in a local time (4pm ET) to Wednesday at 10 in a local time.
Dominique Dehaene, spokesman Skeyes, told CNN Wednesday that no commercial aircraft would fly under 8,000 meters in Belgian airspace. Military, humanitarian and emergency flights would have been allowed, he said.
Three unions called the strike that wants higher pay. Skeyes air traffic controllers manage more than 3,000 aircraft daily, making up to 1 million flight movements per year.
Natalie Pierard, Brussels airport spokesman, CNN said: "It's hoped to leave 591