 The guided busway runs for 13.4 kilometres (8.3 miles) and was opened in September 2013.Luton Airport is from Junction 10a on the M1 and is the fourth-largest airport serving the London area, after Heathrow, Gatwick and Stansted, and is one of London's six international airports along with London City Airport and London Southend Airport.The airport is a hub for EasyJet, TUI Airways and Ryanair.