Both represent a significant upgrade from the existing offering: First class becomes an enclosed suite with a privacy door, and business class now features industry-standard direct aisle access.

Even Premium Economy and Economy get a refresh. However, there are so many variants being sold to customers, it may cause some confusion for passengers.

It will also stop open doors access.

United and Delta have followed suit.

Each seat is huge, with throne like seating. There is the same inflight lounge as you get in Business Class, but the dining is top notch, with five star eight course restaurant dining, along with a wine cellar with some decidedly rare drops.

To find out, we take an American Airlines A321T First Class Transcontinental to Boston from Los Angeles - the longest flight you can take across the United States.