Norwegian Air is again trimming its transatlantic network.
From September 15, nonstop flights to and from Ireland will be suspended.
It cites the Boeing 737 Max grounding as a factor.
Flights to Dublin from Providence, Rhode Island, Newburgh New York Stewart International Airport and Hamilton Ontario will be scrapped.
Customers with tickets beyond this date can claim a full refund or rebook on other Norwegian Air flights.
The airline notes it still serves alternative routes to Dublin via Stockholm, Oslo, or Copenhagen.
"Since March, we have tirelessly sought to minimize the impact on our customers by hiring replacement aircraft to operate services between Ireland and North America. However, as the return to service date for the 737 Max remains uncertain, this solution is unsustainable," the airline said in a statement.
Norwegian still operates from more than a dozen US cities although many are seasonal routes.
They include Los Angeles, Miami, New York JFK, Newark, Tampa, Oakland and Chicago.
