British Airways has signed an interline deal with US budget carrier Jet Blue, covering a number of its routes in the United States.

The agreement includes the two carriers’ flights from JFK, Boston, Washington DC and Orlando and covers 18 daily transatlantic BA flights, plus more than 50 JetBlue US routes.

The deal is not technically a first between BA and a budget carrier as they already have an agreement with Westjet and Air Berlin.

For Jet Blue this is its 25th airline partner. The carrier is 19 per cent owned by Lufthansa. In recent years Jet Blue has grown away from the budget model, offering extra legroom options and a frequent flier programme.