Norwegian Air, a budget airline, says it will end flights between Ireland and the US next month, blaming the grounding of the Boeing 737 Max.
"We have concluded that these routes are no longer commercially viable," the statement said.
The Norwegian, which is struggling to make a profit, said last month the grounding of the Boeing 737 Max could cancel its plan to return to profitability.
The Norwegian stated that all six routes from Dublin, Cork and Shannon to the US and Canada will end on September 1
The Boeing 737 Max fleet was launched after two fatal crashes, the first Lion Air crash in Jakarta last year and the second Ethiopian Airlines crash shortly after taking off from Addis Ababa in March.
A total of 346 people were killed.
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"We have been working tirelessly since March to minimize the impact on our customers by hiring a replacement aircraft to operate services between Ireland and North. the return of the serving date for 737 MAx remains uncertain, this decision is unsustainable, "said Matthew Wood, Senior Vice President of the Norwegian Division for the Long Distance.
The airline said customers who already have booked flights will be diverted to other Norwegian services.
If passengers no longer want to travel with the airline, the Norwegian stated that they would be offered a full refund.
"We will continue to offer regular services from Dublin to Oslo, Stockholm and Copenhagen as normal," said Mr Wood.
The airline stated that any redundancies arising from the decision to terminate Ireland-US routes would be a "last resort".
"Our 80 based Dublin administrative staff at Norwegian Air International and the Norwegian Group Assets Company, Arctic Aviation assets will not be affected by the closure of routes," added Mr Wood.
The Norwegian Air was founded in 1993 as a small domestic airline, but changed its strategy in 2002 to become a budget carrier.  Its low fares helped it grow rapidly and is now the third largest low-cost carrier in Europe.
Last year it launched 35 new routes, transportation
His great innovation was to operate low cost long flights between the United Kingdom and the United States, which began in 2014. He now flies to 12 destinations in the US at London Gatwick Airport.
It became the largest international carrier serving the New York area, carrying more passengers there than British Airways, Air Canada or Lufthansa, according to New York and New Jersey port authorities.
However, this growth came at the expense of profits.
The airline lost 1.45 billion kroner (£ 135m) last year, blaming fuel costs, intense competition and engine problems on its Dreamliner aircraft.
In March, in order to improve his finances, the Norwegian raised Kroner 1.3 billion through the sale of shares and also sold some aircraft.