Currently, the airline flies the route daily with a Dublin departure at 15.20.
With the new flights set to take off at 8.30am GMT (arriving in the US at 10.30am), and late flights returning at 21.25 (arriving in Ireland at 8.55am the next day), the timings appear to make shopping or business daytrips a reality.
Woodbury Common, the popular outlet centre in Central Valley, New York, is just a 30-minute drive from Stewart Airport, in Orange County.
Buses and taxis are available between the airport and outlet centre (the airport express bus to Midtown Manhattan takes around 90 minutes).
It’s not the first time daytrips have been possible between Dublin and New York. In the past, Aer Lingus has operated a 7.50am summer departure, allowing passengers to make a break for the Big Apple before jetting home again at 9pm.
How many actually did that, of course, is less clear.
Norwegian launched direct flights from Cork, Dublin, Shannon and Belfast to the US last summer, and is now in the process of adding capacity.
As well as adding flights from Dublin to Stewart, the airline will double its frequency from Shannon to Boston Providence from March 27 (from two to four flights weekly), and add a third weekly flight to Stewart.
Its Cork-Providence flights are being maintained, though there is no further announcement as yet on the touted Cork-New York service.
The new (earlier) Dublin flights have yet to go on sale, though one-way fares between the destinations are currently available from €83.69 to €340 in April, depending on the dates of travel (checked luggage and meals are extra).
“While we have exciting plans to introduce double daily flights from Dublin to New York, we have decided to put the additional flights on sale at a later date,” a spokesperson for the airline told Independent.ie Travel.