Easing of congestion at European airport helped boost flight performance by Norwegian Air the final weeks of the summer holidays.
The Scandinavian low cost carrier flew almost two million passengers in August, up from less than 800,000 in the same month last year.
A new route between Trondheim and Manchester was opened last month while the airline marked its 20th anniversary and launched a sale for flights this autumn and winter.
Norwegian operated an average of 69 aircraft with a load factor close to 86%.
Punctuality, measured by the number of flights departing within 15 minutes of scheduled time, was just 63% in August. However, as many as 96.5% of all flights arrived on schedule or no more than an hour late, according to the carrier.
Chief executive Geir Karlsen said: “August marks the end of summer and the month marked another strong performance for Norwegian.
“We operated our planned programme and flew close to all scheduled flights. We are particularly happy that bookings into autumn are encouraging and that business travellers are returning.
“The congestion at European airports has begun to improve, which is positive for our operations but also, importantly, to the travel experience of our customers.
“It is uplifting for the industry in general that we are continuing to return to normal operations after these extraordinary years for aviation.”