People travelling from London Heathrow to Northern Ireland are to save £10 per flight under a cost-cutting plan. Heathrow said it was reducing passenger charges on domestic trips and claimed the measure would amount to a £60m saving over the next two decades.
Among the flights to benefit will be the eight return trips from the London hub to Belfast each day with British Airways, and a further three with Irish carrier Aer Lingus.
Earlier this year, it was claimed that giving the green light for an £18bn third runway at Heathrow would bring a significant boost to Northern Ireland's economy and could also lead to new connections from local airports.
Heathrow's new domestic charge of £19.10 a passenger is more than a third cheaper than it was throughout the year.
It proposed extending the discount until 2037 "as long as it is in the public interest and there is a justification".
Heathrow's chief executive, John Holland-Kaye, said: "Earlier this year, Heathrow promised to do more to help Britain's economy grow stronger. This morning, I'm delighted that we're able to come good on that promise with our new £10 domestic discount.
"Putting over £500m back into the pockets of British families and businesses will help to spur growth in every part of the UK."