JetBlue Airways will expand its European network next year with daily seasonal flights from Boston to Milan starting May 11 and Barcelona beginning April 16.

The airline is using its long-range Airbus A321LR planes, allowing single-aisle jets to operate transatlantic routes more efficiently and cost-effectively than larger twin-aisle aircraft.

These new routes target higher-paying vacationers with JetBlue’s profitable Mint business class, complementing its existing service to London, Paris, Amsterdam, Edinburgh, and Dublin.

The Milan flight will be JetBlue’s longest, lasting about nine hours westbound and nearly eight hours eastbound, CNBC has reported.

The expansion reflects a broader industry trend of U.S. airlines adding long-haul international destinations and premium seating to drive profits and optimize fleet utilization.