JetBlue is expanding its Europe connectivity ahead of plans to begin its own transatlantic flights in 2021. 

On Thursday, JetBlue signed a letter of intent to interline with discount carrier Norwegian Air. Connecting itineraries between the carriers for summer 2020 and beyond are expected to be available for purchase on the JetBlue and Norwegian websites and via the GDSs early next year, the airlines said. 

Under the pending deal, connecting customers would also be able to check baggage through to their final destinations.    

The agreement would link the extensive U.S. and Caribbean network of JetBlue with Norwegian's robust transatlantic and European networks via JetBlue's three largest focus cities: New York, Boston and Fort Lauderdale. Norwegian currently operates 20 nonstop routes to Europe from those three gateways.

"Norwegian shares our belief that customers benefit when we bring competition and low fares to the transatlantic market currently dominated by joint ventures, legacy alliances and sky-high ticket prices," JetBlue CEO Robin Hayes said in a statement. 

JetBlue already codeshares in the transatlantic market with Aer Lingus and Icelandair. It plans to begin flying to London from Boston and New York in 2021 and to other European destinations in 2023.

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