The airline says the majority of their flights to & from the Belgian airport will resume on Friday
Ryanair says most of its flights to Brussels main airport will resume on Friday.
However, its flights between Zaventem and Dublin will not resume until later this month.
The airport, which was damaged in suicide bombings last month, has reopened with some restrictions.
Ryanair says five of its routes to and from Zaventem - Berlin, Dublin, Malaga, Palma and Venice Treviso - will not resume until at least April 20th. They will instead continue operating to and from Brussels Charleroi.
Aer Lingus flights to and from Brussels Airport have resumed, although the airline will not be operating a full schedule until the beginning of May. You can find out more information here.
32 people were killed in Brussels in attacks by Islamic State suicide bombers at the airport and a metro station on March 22nd.