Delta Upgrade Certificates are one of the most valuable Medallion Choice Benefits. This guide explains the key differences between Global Upgrade Certificates (GUC) and Regional Upgrade Certificates (RUC) — including who can use them, where they work, how to apply, and how to decide which is right for your travel in 2025.
Quick Look
What is a GUC
Global Upgrade Certificate for Diamond Medallions that can move you up one cabin on eligible Delta-operated and select partner international or domestic flights. View eligible routes.
What is a RUC
Regional Upgrade Certificate for Platinum and Diamond Medallions that upgrades one cabin on domestic and short-haul international routes. Check eligible regions.
Who gets them
Platinum may select RUC; Diamond may select GUC, RUC, or a combination as Choice Benefits.
Validity
Certificates must be flown by the end of the Medallion Year tied to your selection. For 2025 status, valid through January 31, 2026.
Delta Upgrade Certificates: GUC vs RUC Basics
Both certificate types provide one-cabin upgrades on eligible fares and flights. Space can be confirmed at booking when available, or you may be waitlisted based on Medallion priority. Certificates are not valid on Basic Economy and must be used by the expiration date tied to your Medallion Year. Official details here.

Eligibility and Earning
- GUC (Global Upgrade Certificate) — Diamond Medallion only via Choice Benefits.
- RUC (Regional Upgrade Certificate) — available to Platinum and Diamond Medallion members via Choice Benefits.
- Typical Diamond selections — 4 GUC / 8 RUC / 2 GUC + 4 RUC.
- Validity — certificates must be flown by January 31 following the Medallion Year tied to selection (e.g., 2025 → Jan 31, 2026).
Where You Can Use Them
Check the Delta Upgrade Certificate search page for current eligible routes and partner availability.
How to Apply Certificates
Use the Upgrade Certificate portal to confirm eligibility, or contact Delta Reservations or use the Fly Delta app to apply certificates to your bookings.
Strategy — Which Should You Choose
Frequent international flyers benefit most from GUCs since they unlock Delta One and Premium Select seats. If most of your travel is domestic or within North America, RUCs provide strong value and higher confirmation odds. Compare your routes using the upgrade eligibility tool.