Delta One is Delta's highest level of service, usually reserved for international long-haul flights. Delta One offers lay flat seats, premium Westin branded bedding, multi-course chef driven meals, Sky Club access, top shelf liquor & DL's best wines (some of which are just OK, but still their best) and most Delta One cabins offer direct access to the aisle for all seats, but not the 757.

First class is just a regular seat, but a little bigger and with a little more leg room, which includes an open bar & snacks, and a meal if you fly during meal times. It is the kind of seat you see in first class on the vast majority of domestic flights.

More below:

Delta One: https://www.delta.com/content/www/en...ess-class.html


First: https://www.delta.com/content/www/en...rst-class.html