Can a transatlantic budget airline succeed?

From Sir Freddie Laker’s ill-fated Skytrain in the 1980s to the more recent boom and bust of Norwegian, the dream to create a sustainably profitable, low-fare transatlantic airline has seen many carriers land up in the aviation graveyard.

Now another airline is giving it a go. JetBlue has resumed flights to Dublin from Boston and New York and next month launches Boston-Edinburgh, promising round-trip promotional fares starting at £449, while also resuming at Gatwick

Its secret sauce is to…