An additional frequency between Belfast International Airport and Birmingham has been scheduled by easyJet as the airline responds to demand.
A second Sunday service will be added from the start of the summer timetable on March 31, 2013.
The additional frequency will add an estimated 13,000 passengers a year, taking the total to 150,000 on the route which was started by the airline in October.
EasyJet head of Northern Ireland Ali Gayward said: “We only launched our Birmingham route in October and due to an overwhelming demand for affordable fares, we are delighted to announce the doubling of our Sunday flights.
“This additional frequency will see an increase from 12 to 13 flights per week.
“Our aim has always been to make travel easy and affordable and we’re delighted to be able to show further commitment to Northern Ireland by responding to demand and adding the extra service.
“Sunday is a strong travelling day for both business commuters and people on weekend breaks, therefore doubling our Sunday offering will give our passengers further choice in flight times at affordable prices.”