The low-cost airline reported “solid” passenger growth last month, carrying more than 2.8 million passengers – up by 362,613 against March 2017.
It also improved its load factor to 86.7% rising by 2.6 percentage points.
Norwegian said the growth had been influenced by what it called the “Easter effect”, adding that “we will therefore see the opposite effect for the April figures”.
Bjørn Kjos, chief executive, said: “Even though Easter strongly impacts this month’s figures, we have a solid passenger growth. The international growth continues, and at the same time, more people are flying with us in Scandinavia.