Low-cost airline Norwegian Air Shuttle announced Thursday three new routes between London and the United States, despite its shaky start in the long-haul business.

The company will fly from Gatwick to New York JFK, Los Angeles, and Fort Lauderdale two or three times a week starting in the summer of 2014.

"Launching long-haul routes between London Gatwick and the United States is also an important part of our strategy to expand internationally and get a stronger foothold in markets outside Scandinavia," Norwegian's chief executive Bjoern Kjos said.

The company has ordered eight new Boeing 787 Dreamliner aircrafts for its intercontinental operations which started last summer.

Norwegian, one of the few low-cost airlines that have ventured into the long-haul segment, has suffered delays and cancellations since last summer due to multiple technical problems with the two Dreamliners it has already received.

The company is the only airline so far that has entrusted Boeing with the technical maintenance of its new aircraft.

One of its two Dreamliners went back in the air Monday after being stranded for more than three weeks for technical modifications by Boeing, Norwegian spokesman Lasse Sandaker-Nielsen said.

The other aircraft is parked for similar technical improvements at Arlanda, Stockholm's international airport, and is expected to start flying next week, Sandaker Nielsen said.

Repeated groundings of its Boeing 787 has forced Norwegian to rent Airbus A340 aircraft from the Portuguese company HiFly to cover its long-distance routes between Scandinavia, the United States, and Bangkok.