Winter capacity is being raised by 20% on the Dublin route from Leeds Bradford airport.
Stobart Air, operator of Aer Lingus regional routes, is to make 50,000 seats available from October 28 with up to three daily flights on Mondays, Fridays and Saturdays.
The carrier will deploy ATR 72-600 aircraft between Leeds Bradford and the Irish capital, bringing an additional 1,700 seats a month.
The increased capacity will meet demand from business travellers looking to make onward connections to the US via Aer Lingus transatlantic services using US customs and border protection pre-clearance at Dublin airport.
Stobart Air managing director Graeme Buchanan said: “We closely monitor trends and prepare for busy seasonal periods which enables us to consistently deliver an efficient, reliable service.
“The additional seats will ensure flexibility for our passengers, providing business and leisure customers with a wider choice.”
Leeds Bradford airport aviation and commercial director John Cunliffe added: “I am sure this additional capacity will prove popular for business customers.
“In particular, the new mid-afternoon flight facilitates onward connections with Aer Lingus transatlantic flights, with reduced transfer times and greater choice of connections available.
“The investment of additional capacity by Stobart Air on the route further confirms the economic significance of the Leeds City region, the largest economy in the UK outside of London.”