American Airlines will begin using the three-class Airbus A321T on its transcontinental Los Angeles to Boston flights this spring.The announcement makes American Airlines the only carrier to offer both first and business class on the route.MORE Airlines & Airports Amenities in the A321T’s Flagship First and Flagship Business class include fully lie-flat seats and a chef-curated menu, as well as premium wines.Main Cabin travelers meanwhile can stay connected with power at every seat, high-speed Wi-Fi and seatback entertainment.Additionally, as part of American’s new collaboration with Zoës Kitchen, Main Cabin customers can purchase new light and healthy menu options.“The Flagship experience on the A321T continues to win awards for best domestic first-class travel and provides thoughtful comfort and convenience for customers,” said Vasu Raja, vice president of Network and Schedule Planning for American. “By introducing the A321T on two daily flights between important business markets like LAX and BOS, we are delivering on our promise to create a world-class customer experience.”The airline said the A321T has become the standard for comfort when traveling between New York’s John F. Kennedy International Airport (JFK) and LAX, as well as between JFK and San Francisco International Airport (SFO).Flagship First and Flagship Business customers will have access to meals designed by chef-partner Sam Choy as well as a lumbar support pillow, duvet, mattress pad and other bedding from sleep experts Casper.The aircraft also offers 36 Main Cabin Extra seats, which include extra leg room and complimentary beer, wine and spirits.All customers in the Main Cabin will be offered free movies and TV shows with seatback entertainment. High-speed satellite Wi-Fi is available for purchase with bandwidth sufficient to support access to personal subscription video streaming services like Netflix and Hulu.Also, notable, Boston customers traveling in Flagship First or Flagship Business will have access to a newly renovated Admirals Club. The club is slated to re-open in early 2019 after an ongoing colocation project is completed that will move all American flights to the same terminal with one ticket counter and one baggage claim, and with all gates in the same area, for a seamless customer experience in Terminal B.At LAX, customers flying in Flagship First have exclusive access to the most premium experience, including Flagship First Check-In — a private, dedicated VIP check-in facility — the Flagship Lounge and Flagship First Dining in Terminal 4.Flagship First Dining offers customers an elevated sit-down meal featuring regionally inspired dishes and locally sourced ingredients including the Flagship Burger, which was called the “best airport burger” by Travel + Leisure.Flagship Business customers enjoy the best amenities and services in the Flagship Lounge at LAX with a range of options, including a robust food offering and a chef action station with fresh, made-to-order dishes, along with the ability to pair meals with premium wine, champagne, and spirits or a refreshing drink from the build-your-own-cocktail station.The new flights will be available for sale starting on Monday, December 3.