Brussels Airport does not expect to reopen for passenger flights until Tuesday.
Last Tuesday, bombs exploded at the airport and at a metro station in the Belgium capital, killing more than 30 people.
And Brussels Airport said in a statement today that it is "starting preparations to partially resume passenger flights".
The airport said: "Brussels Airport Company is currently studying a temporary solution to partially resume passenger flights, taking into account the new security measures that apply at Belgian airports, decided by the federal government.
"Passenger flights are not expected to resume before Tuesday 29 March 2016."
Travellers in the UK have been warned to expect delays to their travel this weekend by the government because of enhanced security checks following the attacks.
Downing Street said there would be an increased police presence at ports, airports, underground stations and international railway stations, as well as enhanced border checks.
A spokesman said: "As a result, travellers over the Easter weekend may experience some limited delays to their journey and should check the advice of travel companies before starting their journeys."