Scandinavian budget carrier Norwegian has entered a tentative agreement for transatlantic co-operation with US counterpart JetBlue Airways.
Norwegian says the pact would provide greater flexibility and choice for customers of both operators.
It says its passengers will be able to access some 60 US routes as well as 40 connections to the Caribbean and Latin America, via JetBlue's hubs at New York JFK, Boston and Fort Lauderdale.
JetBlue customers, in turn, will be able to fly with Norwegian on 20 intra-European routes.
Norwegian says that passengers will have the ability to book journeys under the collaboration with a single transaction, from either carrier's booking engines.
"JetBlue is an ideal partner for us," says Norwegian chief Geir Karlsen, referring to the US operator's extensive network.
The pact is set to take effect during the first half of next year.
JetBlue chief Robin Hayes says transatlantic routes are "dominated by sky-high prices" and that the agreement with Norwegian will benefit customers.