Flying Blue just made a small but important change that fixes one of the most annoying parts of its loyalty program. Flying Blue Simplifies Mileage Expiration Policy Air France-KLM’s Flying Blue program has updated its mileage expiration policy, and this is one of those rare changes that is actually better for customers (which makes me think we are due for a devaluation when the other shoe drops…). As of May 4, 2026, all Flying Blue miles will follow a single, unified expiration rule: your entire balance will remain valid as long as you have any earning activity at least once every 24 months. That may sound minor, but it’s a big deal. What’s Changing Flying Blue is scrapping its confusing system whereby miles newly earned miles did not necessarily extend mileage expiration. In short, crediting a flight to Flying Blue or earning miles with a co-branded credit card tolled the mileage expiration, but other activity, most notably transfers from credit card partners, did not. That system is gone.…