Norwegian Air has yet to touch down in Boston, but the budget carrier — which announced nonstop service to Oslo and Copenhagen today — already is boasting it’s the largest non-U.S. airline at Logan International Airport in terms of routes.

This time next year, Norwegian will fly to five destinations from Boston, launching with twice-weekly Caribbean service to both Guadeloupe and Martinique on Dec. 3.

That’ll be followed in May by four weekly direct flights to London Gatwick Airport, twice-weekly service to Oslo and one weekly flight to Copenhagen.

“We think Boston is ?underserved,” CEO Bjorn Kjos said. “The fares are very high, especially from Boston to Europe. You can expect that you will see even more Norwegian flights in and out of Boston in the future. It will be some other areas in Europe.”

Currently no airlines offer direct flights between Boston and Oslo, Copenhagen or London’s Gatwick Airport. Air passengers traveling last year between Boston and Oslo totaled 11,667, while 35,141 passengers traveled between Boston and Copenhagen, according to Massport, which runs Logan.

“It’s another win for passengers, who have more choices,” Massport CEO Tom Glynn said. “This is definitely a big presence in the marketplace of an emerging low-cost carrier with good service … and very good prices. They’re kind of the JetBlue of this generation, so it’s good that they’re looking at us as one of their major centers.”

Norwegian is touting one-way fares starting at $215 to Oslo, $229 to Copenhagen and $299 to London.

“A lot of people underestimate our network because we fly on 428 routes to different parts of Europe,” Kjos said. “If you fly, for instance, from Boston to London, you’ll have connections to a whole range of different cities in Europe and the same flying into Oslo or Copenhagen.”

But airline industry analyst Henry Harteveldt doesn’t think Norwegian will serve the Caribbean very well from Boston. “The flights will be leaving in the afternoon and evening,” said Harteveldt, founder of Atmosphere Research.

“Generally people prefer to leave sometime in the morning, so they arrive by early afternoon.”

And Oslo is not generally a top European destination, according to Harteveldt. “Gatwick will certainly be more popular than either Oslo or Copenhagen, but Norwegian is a low-fare budget airline, and they will appeal to price-sensitive travelers who might otherwise not travel,” he said.