Emerald Airlines, operator of Aer Lingus Regional, will launch services to Belfast City Airport from Manchester later this month.
Customers can book tickets now from £36.99 each way.
The airline is also offering Avios points on all Aer Lingus Regional flights, which provides benefits with both Aer Lingus and British Airways tickets.
The new service to Belfast will operate three times a day from March 27.
Conor McCarthy, CEO of Emerald Airlines said: “Having already announced our services linking Manchester and Belfast, we are delighted to go on sale from today with Aer Lingus and British Airways.
"We want to be the airline of choice for customers travelling to and from Belfast City Airport, and with today’s announcement we are well positioned to deliver on that objective.
"We’re keen to build upon our announcement today, with more flights, destinations, and great fares to follow in the very near future.”
Reid Moody, Chief Strategy and Planning Officer at Aer Lingus said: “Today marks another important day for Aer Lingus Regional services - it is good news for customers and good news for connectivity to / from Northern Ireland.
"Aer Lingus is looking forward to working with our partners at Emerald Airlines on future Aer Lingus Regional operations.”
Manchester Airport to Belfast City Airport can be booked through the British Airways website and Aer Lingus website.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here