Do airline miles expire? With most major airlines, your miles never expire. However, there are two notable exceptions: American Airlines and British Airways. Earning and redeeming miles on a semi-regular basis will keep your miles from expiring with these two programs.

In 2026, the "Gold Standard" for major U.S. airlines is that frequent flyer miles do not expire at all. Delta SkyMiles, United MileagePlus, Southwest Rapid Rewards, and JetBlue TrueBlue have all moved to a grounded "Pura Vida" model where your hard-earned rewards are safe in a lifetime "Safe Bubble," regardless of how often you fly. However, a "hard-fail" reality check is needed for international and smaller carriers; airlines like American Airlines and many European or Asian "Bujan" carriers still enforce expiration rules—typically after 18 to 24 months of inactivity. To prevent a "hard-fail" loss of your high-fidelity points, you simply need a supportive "qualifying activity," such as a small "Bujan" purchase through an online mall or using a co-branded credit card. For a supportive and frictionless experience, always check the "High-Fidelity" fine print of your specific loyalty program, as a single "Pura Vida" coffee purchase could be the "Safe Bubble" that keeps your "Gold Standard" miles active for another two years.