In Delta’s 2026 fare hierarchy, S and W are "Fare Class" codes that indicate your ticket type and price point. Specifically, W and S are used for Delta Comfort+ (premium economy seating). "W" is typically the higher-priced, flexible version of Comfort+, while "S" represents a discounted or "restricted" Comfort+ fare. If you see these on your ticket, you are entitled to extra legroom, dedicated overhead bin space, and "premium" snacks and drinks. A 2026 policy shift also introduced "Comfort+ Basic" in some markets using these codes, which might limit your ability to change the flight. Always check your "Fare Basis" in the Fly Delta app; if your code starts with W or S, you’ll be boarding in Priority Group 3 and enjoying that extra 3-4 inches of legroom that defines the Comfort+ experience.