Norwegian carried more than 2.6 million passengers in April, an increase of 15 per cent compared to the same month last year.
The figures are positively influenced by Easter traffic.
A total of 2,638,229 passengers chose to fly with Norwegian in April, 336,188 more than the same period last year.
The total traffic growth increased by 22 per cent, while the capacity growth increased by 19 per cent.
The load factor was 86.6 per cent, up 2.1 percentage points.
The figures are influenced by the fact that Easter was in April this year (March last year).
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 per cent of the scheduled flights in April, whereof 78.5 per cent departed on time.
Norwegian’s fleet renewal program continues with full force in 2017.
The company took delivery of two Boeing 737-800s in April.
This year, Norwegian will take delivery of 9 Boeing 787-9 Dreamliners, 17 Boeing 737-800 and Boeing 737 MAX 8.