How to Fly Delta One Lie-Flat Seats on Domestic Routes in December 2025

Delta mostly uses its internationally-configured aircraft, well, on international flights. However, during December 2025, Delta has scheduled widebody aircraft with lay-flat business class seats on 2,435 domestic U.S. flights. That's an average of over 78 flights a day! In this article, we list out (and map) all 65 routes and the exact flights where you'll find these aircraft flying within the U.S. Plus, we'll show you the best ways to book these flights with points and miles.