Flying doesn’t come cheaply these days, particularly on long-haul flights across the Atlantic.

But Norwegian Air Shuttle, which specializes in low-cost flights within Europe, plans to bring its pared-down model to the United States and Asia.

Its strategy, however, comes with a few twists: Norwegian is moving its long-haul operations from Norway to Ireland, basing some of its pilots and crew in Bangkok, hiring flight attendants in the United States, and flying the most advanced jetliner in service — the Boeing 787 Dreamliner. In the process, it has infuriated established carriers and pilots.

Other airlines have tried a low-fare approach on long-haul flights, with little success. But Bjorn Kjos, Norwegian’s ebullient chief executive, is confident that his unconventional approach will allow the airline to offer fares 50 percent cheaper than the competition’s.

Norwegian started flying between Oslo and Kennedy Airport in New York in May and has round-trip fares starting at $509. The second-lowest price found recently was $895 on United Airlines flying out of Newark Liberty International Airport. Norwegian plans to add more than a dozen new routes this year, including direct service from London to New York and Copenhagen to Fort Lauderdale, Fla., once regulators approve its new registration in Dublin.