A £5.7 million government grant is being made to secure air links between Northern Ireland and the mainland UK.
The funding will “temporarily support” services on routes from Belfast City and City of Derry to London during the coronavirus pandemic.
The cash will ensure lifeline services are maintained, protecting key air links described as vital for connecting critical workers and ensuring that those who need to travel can continue to do so.
The package is being funded by the government and the Northern Ireland Executive.
The funding will enable Aer Lingus to maintain the Belfast to London route, which would be at risk without financial assistance given low passenger numbers.
Increased subsidies will go to Loganair to continue operating the City of Derry airport to London route.
Transport secretary Grant Shapps said: “Maintaining air links between Great Britain and Northern Ireland is vital.
“We must ensure that critical workers can continue to fly over the Irish Sea, and today’s investment in these lifeline services guarantees that.”
Northern Ireland secretary Brandon Lewis added: “Today’s announcement is great news for people and businesses in Northern Ireland, it means that crucial air services to and from London, Belfast City airport and City of Derry airport will be safeguarded, thanks to this multi-million pound government support package.
“Alongside the recent £17 million support package the UK government announced to ensure essential ferry routes were maintained, this additional commitment to safeguard the connectivity of the entire United Kingdom will guarantee the continued supply of critical goods, such as food and medical supplies and ensure key workers are able to carry out their roles.”
Northern Ireland infrastructure minister Nichola Mallon added: “Our airports have been badly affected by the dramatic drop in passenger numbers but, like me, they recognise the need to keep our island connected.
“This is a unique payment that will offer much needed support in the short term during the crisis.”