Qatar Airways (QR) is the flag carrier of Qatar and a member of the oneworld alliance. From its hub at Hamad International Airport (DOH), the airline flies to about 145 destinations spread across all six inhabited continents. Qatar Airways' fleet features planes with two-cabin (Business Class and Economy Class) and three-cabin (First Class, Business Class and Economy Class) configurations. Both Business Class and First Class seats can be converted into beds. For premium class passengers flying from Hamad International Airport, the airline operates the Al Mourjan Business Lounge. A second Qatar Airways lounge can be found at London Heathrow Airport (LHR).