Norwegian’s global expansion helped boost August passenger numbers by 14% to almost 3.3 million.
The strongest growth was on the low-cost carrier’s long-haul routes and in Spain.
The load factor increased by 1.4 percentage points to 91% year-on-year in August.
Chief executive, Bjørn Kjos, said: “We are very pleased that an increasing number of passengers choose Norwegian for their travels and are grateful both to new passengers and those who keep returning.
“We’re experiencing a high demand for tickets in our established markets in Scandinavia, but the strongest growth is on Norwegian’s long-haul routes and in Spain.
“Continuing our global expansion is important – both in terms of strengthening our competitiveness and creating more jobs and economic value in the markets we operate.”
Norwegian’s fleet renewal continued with the delivery of two Boeing 787-9 Dreamliners and one Boeing 737 MAX in August.
EasyJet flew 9.4% more passenger in August then the same month last year.
Total carryings for the month rose to 8.2 million from 7.5 million a year earlier with an improved load factor of 96.3%.
The August figures gave easyJet a rolling annual total of 79.4 million passengers, up by 9.2% year-on-year.
British Airways, Aer Lingus, Iberia and Vueling owner International Airlines Group recorded a 0.7% increase in passenger carryings to 10.6 million last month.
Group premium traffic increased by 1.9% in August.