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When Do Airline Miles Expire? A Complete Guide to Every Major Program
July 1, 2025
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You spent months earning them. You planned to use them for that dream trip. Then one day you log in... and they're gone.
Airline miles expiration is one of the least exciting topics in the points and miles world, but it's also one of the most costly to ignore. Miles don't quietly sit in your account forever. Many programs have strict rules about when airline miles expire, and the clock is always ticking, whether you realize it or not.
Here's everything you need to know, broken down by program type.
The Two Ways Airline Miles Expire
Not all expiration policies work the same way. There are two distinct models you need to understand:
Inactivity-based expiration means your miles expire if you don't earn or redeem within a set window. Any qualifying activity resets the clock, so staying active keeps your miles alive indefinitely.
Hard expiration means miles expire a fixed number of months after they were earned, regardless of account activity. There's no resetting the clock here, which makes these programs the riskiest for anyone sitting on a large balance.
Knowing which type applies to your program is the difference between saving your miles with a $5 purchase and losing them entirely.
Airlines Where Miles Expire After Inactivity
These programs let you keep miles alive as long as you stay active. Earning, redeeming, or in some cases even shopping through the airline's portal counts as activity.
Quick tip: You don't need to book a flight to prevent your airline miles from expiring. Earning miles through a credit card purchase, shopping portal, or hotel stay is usually enough to reset the clock.
Airlines With Hard Expiration Dates
These are the programs to watch most carefully. Miles expire based on when they were earned, not when you last logged in or made a purchase. Activity does not extend them, and there are no exceptions.
If you transfer credit card points into one of these programs, that expiration countdown starts immediately. Only transfer when you have a specific redemption ready to go.
Airlines Where Miles Never Expire
Good news for patient travelers: several major carriers have eliminated airline miles expiration entirely.
- Delta SkyMiles
- United MileagePlus
- Southwest Rapid Rewards
- JetBlue TrueBlue
- Virgin Atlantic Flying Club
With these programs, you can accumulate miles without worrying about them disappearing. That said, "miles never expire" doesn't mean "always valuable." Airlines regularly devalue their miles over time, which is a separate but equally important risk to understand.
The Real Risk: Hoarding Miles
Here's the thing about hoarding airline miles: it's a strategy that quietly works against you in two ways.
First, expiration risk. The longer miles sit untouched, the more likely you are to lose them, especially in programs with 12- or 18-month inactivity windows. Life gets busy, and 12 months goes faster than you think.
Second, devaluation. Airlines routinely increase the number of miles required to book a given flight, and those changes almost never go in the traveler's favor. Miles you earned two years ago may buy fewer seats today than they would have when you first earned them.
The best approach is to earn with a plan and redeem intentionally. Not speculatively, but not endlessly deferring either. Know roughly what you're saving toward before the miles pile up.
How to Keep Your Miles From Expiring
If you have miles at risk of expiring, here are the fastest ways to reset the clock on inactivity-based programs:
- Make a small purchase through the airline's shopping portal — even a few dollars counts as activity in most programs
- Transfer hotel points to the airline — a small transfer from Marriott, Hilton, or Hyatt usually qualifies
- Use a co-branded credit card — any purchase on an airline credit card typically resets the timer
- Book an award redemption — even a small redemption counts as activity
For hard-expiration programs like KrisFlyer or JAL Mileage Bank, your only real options are to use the miles before they expire or pay to extend them, where the program allows it.
Frequently Asked Questions
Do airline miles expire if you don't use them?
It depends on the program. Many airlines expire miles after a period of inactivity, typically between 12 and 36 months. Others use a hard expiration tied to when the miles were earned. A handful of major programs, including Delta, United, Southwest, and JetBlue, have eliminated expiration.
How do I stop my airline miles from expiring?
For inactivity-based programs, any qualifying activity resets the expiration clock. This includes earning miles through a credit card purchase, shopping portal transaction, hotel stay, or even a small award redemption. You don't need to fly to keep your miles alive.
Which airline miles expire the fastest?
Avianca LifeMiles have the shortest inactivity window at 12 months. Among hard-expiration programs, Singapore Airlines KrisFlyer, ANA, JAL, Turkish Airlines, and Emirates all expire miles 36 months after earning, regardless of account activity.
Can expired airline miles be reinstated?
Some airlines will reinstate expired miles for a fee. Policies vary widely by program and are not guaranteed. It's far easier to prevent expiration than to recover miles after the fact.
Do credit card points expire?
Most major transferable rewards programs, including Chase Ultimate Rewards, Amex Membership Rewards, Capital One Miles, Citi ThankYou Points, and Bilt Rewards, do not expire as long as your account remains open and in good standing. Expiration risk kicks in once you transfer those points to an airline or hotel program.
Bottom Line
Understanding when airline miles expire is one of the simplest ways to protect the value you've worked hard to earn. A quick audit of your loyalty accounts a couple of times a year is all it takes to stay ahead of it.
Know which programs you're in. Know their rules. And when in doubt, use your miles. That's what they're for.
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Editorial Disclosure: Opinions expressed here are those of Kudos alone, not those of any bank, credit card issuer, hotel, airline, or other entity. This content has not been reviewed, approved or otherwise endorsed by any of the entities included within the post.
