A frequent flyer loyalty scheme is being trailed by easyJet to reward its most regular passengers.
The trial has been running for three months and involves more than 15,000 passengers in the UK, France and Switzerland.
More than 90% of those involved say the scheme is appealing to them.
Benefits include increased flexibility on bookings, a price guarantee and a dedicated phone number.
The airline is testing the idea as it reported that the proportion of repeat bookings had risen to 57% from 50% in 2010.
This means that more than 37 million passengers are rebooking each year compared to 25 million four years ago – a rise of 50%.
The figure for returning business customers was even higher at 62%.
Chief executive Carolyn McCall said: “More customers are trying us, liking us and coming back to us.
“In setting up our trial we listened to our passengers to understand what they most value and tailored the scheme to reflect this.
“Unlike traditional airlines’ difficult-to-use mileage schemes, our loyalty scheme gives passengers benefits they really value and is simpler to run.”