easyJet is a British low-cost airline founded in 1995 by Sir Stelios Haji-Ioannou. Operating from multiple European bases, it is one of the continent's largest carriers by passenger numbers, serving over 30 countries and more than 150 airports. The airline pioneered the low-fare model in Europe, offering ticketless travel and direct internet bookings from its early days. It competes primarily with Ryanair and has grown through organic expansion as well as acquisitions, including the purchase of GB Airways routes and assets from Air Berlin. easyJet is listed on the London Stock Exchange and is a constituent of the FTSE 250 index. The airline has placed strong emphasis on sustainability, committing to net-zero carbon emissions by 2050 and investing in research into electric and hydrogen-powered aircraft.