EasyJet will increase the frequency of flights from Belfast International airport to Edinburgh, Manchester and four airports in London on 28 October.
The low-cost carrier will add three weekly flights to the Edinburgh service, bringing frequencies up to 22 flights per week. It will also add three weekly flights to the Manchester connection, resulting in a weekly total of 17 flights.
In addition, EasyJet will add extra weekday morning and evening flights on services to London's Gatwick, Luton, Stansted and Southend airports. The carrier already operates 13 times daily between London and Belfast.