British Airways-owner IAG’s takeover of Aer Lingus moved closer on Thursday as the USA regulator gave its approval and the Irish carrier’s shareholders backed special resolutions linked to the deal.

It said it is “conditional upon commitments offered by the parties”.

Worldwide Consolidated Airlines Group SA, as IAG is formally known, on Tuesday won backing from the European Commission for the deal following concessions by both carriers.

Aer Lingus Chairman Colm Barrington says concerns surrounding the takeover will be proven to be misguided.

It said that as it stood, the deal would have stopped “Aer Lingus from continuing to provide traffic to the long-haul flights of competing airlines on several routes”.

Under the agreement IAG will increase transatlantic services in and out of Ireland by its new Irish subsidiary while five daily landing slots at London Gatwick will have to be given up by the global airline giant under a European Commission direction.

Transport Minister Paschal Donohoe said the outcome was the “right decision” for long-term growth in Ireland. Aer Lingus’ share price is now flat at €2.49.

It has been nearly six months since Aer Lingus first announced the plans to accept the IAG offer.

Shareholders at Aer Lingus have cleared the way for the airline to be sold.