“As of tomorrow, Sunday, Brussels Airport should be partially operational,” Mr. Feist said at a news conference in a hotel near the airport, which is several miles northwest of Brussels. The airport had been closed since the attacks, in which two suicide bombers detonated explosives in the departures hall.

A police spokesman, Michaël Jonniaux, said there would be new security measures at the airport, including spot checks of vehicles and checks of people and baggage entering the airport terminal — which will be open only to those with travel documents and identification. The airport police had previously complained about a lack of security, delaying the reopening.

Mr. Feist said that there will be three flights on Sunday — to Faro, Portugal; Turin, Italy; and Athens — and that passengers would be processed in temporary constructions. He added that for the time being, the airport would be accessible only by taxi or car.

Y.A. is the third person in Belgium to be charged as an accomplice of Reda Kriket, 34, a Frenchman who was arrested outside Paris on March 24.