A late Easter helped drive increased carryings for Norwegian in April.
Europe’s third largest low-cost carrier flew 15% more passengers last month at 2.6 million against April 2016.
The figures are positively influenced by Easter traffic, the airline said.
The load factor grew by 2.1 percentage points to 86.6%.
Norwegian chief executive, Bjørn Kjos, said: “We are very pleased to see that more passengers chose to fly Norwegian.
“Our international growth continues, in line with the company’s global strategy, enabling us to create more jobs.”
Norwegian operated 99.4% of the scheduled flights in April, with 78.5% departing on time.
The carrier took delivery of two Boeing 737-800s in April.
The airline plans to add nine Boeing 787-9 Dreamliners, 17 Boeing 737-800s and six Boeing 737 MAX 8s this year after concluding financing and leasing arrangements.