There is a quiet rule change that's reshaped airline mile programs over the last few years, and I don't think enough new readers have caught on. Six of the eight major U.S. airlines have eliminated mile expiration entirely. You can earn a Delta SkyMile in 2026 and redeem it in 2031 without touching your account. That was not true a decade ago, and it changes the entire calculus of which programs are worth saving into.

This guide is the version I wish I'd had when I started this hobby. We will cover which airline programs let you bank miles indefinitely, which ones still have an inactivity clock running in the background, and which co-branded credit card I would actually use to keep each program's miles alive and growing. As of April 2026, here is the current state of play.

Key Points

  • Six major U.S. airline programs (Delta, Southwest, United, JetBlue, Alaska, Hawaiian) currently let miles sit indefinitely with zero expiration risk.
  • The simplest way to keep any airline mile alive is a co-branded credit card; one swipe a year resets the inactivity clock for the programs that still have one.
  • Welcome bonuses on these cards are worth $700 to $1,400+ depending on how you redeem, which is enough to fund a domestic round-trip or a one-way international economy ticket out of the box.

The Six Programs Where Miles Never Expire

Here is the current 2026 landscape, with the asterisks that matter:

  • Delta SkyMiles. No expiration. Delta dropped expiration in 2011 and has not touched the policy since. The miles you earn today will still be there in five years.
  • Southwest Rapid Rewards. No expiration. Southwest moved to no-expiration in 2013, and unlike most programs this one is genuinely set-and-forget.
  • United MileagePlus. No expiration. United was the most recent to make the switch, dropping expiration in 2019. If you have an old MileagePlus account that you forgot about, log in. Those miles are likely still sitting there.
  • JetBlue TrueBlue. No expiration. TrueBlue points have always been straightforward on this front.
  • Alaska Mileage Plan. Officially "no expiration," but with a real catch. Your account locks after 24 months of zero activity. Activity means earning or redeeming a single mile. A $5 grocery purchase on the Alaska Airlines Visa clears it. If your account does lock, contacting Alaska usually restores access, but plan ahead and avoid the call.
  • Hawaiian HawaiianMiles. No expiration. Hawaiian quietly removed its 18-month inactivity rule, and the program now genuinely banks indefinitely.

The two big U.S. programs you still have to manage are American Airlines AAdvantage (24-month inactivity rule) and the budget carriers Frontier (12 months) and Spirit (12 months). For all three, a co-branded card swipe counts as activity, which is the entire reason these cards earn their keep even if the welcome bonus is the only thing you ever care about on them.

Why "Never Expires" Actually Matters

This is where I get fired up, because I think the framing on most blogs misses the point. The reason non-expiring miles matter is not that you are afraid of forgetting to fly. It is that non-expiring miles let you save toward aspirational redemptions without a clock running.

Think about what 200,000 SkyMiles can do. That's a Delta One business class seat to Europe in shoulder season, or two business class tickets to Mexico City, or a one-way Korean Air business class redemption out of LAX (Delta's partner award chart is an underrated sweet spot here). Two hundred thousand miles is a lot. Most people earn that across two or three years of normal credit card use plus a welcome bonus. If your program had an 18-month expiration with rolling activity, you would be redeeming whatever you could grab in the meantime, just to keep the account alive. Non-expiration lets you stockpile.

The other thing that gets undersold: it makes credit card welcome bonuses on these programs worth significantly more than the headline number suggests, because you can hold those points indefinitely until the right redemption shows up. A 60,000-mile Delta welcome bonus at a 1.4 cpp redemption rate is worth around $840. Hold those miles for two years, find a Delta One sweet spot at 2.5 cpp, and the same 60,000 miles are worth $1,500. The flexibility is the value.

The Best Card for Each Program

I'll go program by program with the card I would actually open today, the welcome bonus as of April 2026, and the value math. These are the cards that do the most for keeping miles alive and earning more of them.

Delta: Delta SkyMiles Gold American Express Card

The Delta Gold Amex is the right card for most Delta flyers, and the value math is straightforward. $150 annual fee. Welcome bonus: 60,000 SkyMiles after $2,000 spend in three months. At 1.4 cpp, that's $840 in flight value out of the gate, against a $150 fee.

The card earns 2x on Delta purchases, restaurants worldwide, and U.S. supermarkets. Where it pays for itself in year two is the free first checked bag, which is $70 round-trip for a domestic flight. If you fly Delta even three times a year, the card covers its annual fee on bag fees alone before you touch the miles.

If you are a heavy Delta flyer (15+ segments a year), the Delta Platinum Amex at $350 makes more sense for the companion certificate alone. The companion certificate pays for itself in one main-cabin domestic round-trip booking. For everyone else, Gold is the right starting point. See our full Delta card lineup for the comparison.

Southwest: Southwest Rapid Rewards Priority Credit Card

The Southwest Priority is the best Southwest card for most people. $149 annual fee. Welcome bonus: 50,000 Rapid Rewards points after $1,000 spend in three months.

But the welcome bonus is not the reason to get this card. The reason is the annual perks: a $75 Southwest travel credit, 7,500 anniversary points (worth roughly $112 at Southwest's 1.5 cpp redemption rate), four upgraded boardings a year (worth $30-$80 each, depending on the route), and a TSA PreCheck or Global Entry fee credit. Those benefits net out to positive territory on the annual fee before the welcome bonus enters the picture.

The strategic case for Southwest specifically: no change fees on award redemptions, and the Companion Pass is one of the most valuable status benefits in domestic travel. If you can hit 135,000 qualifying points in a calendar year, you get a free companion on every flight (cash or award) for the rest of that year and all of the next. That is the real Southwest play.

United: United Quest Card

The United Quest is the United mid-tier card and earns its $250 annual fee back through a stack of credits. Welcome bonus: 80,000 MileagePlus miles after $5,000 spend in three months. At a conservative 1.5 cpp redemption rate, that's $1,200 in flight value.

Annual benefits: a $125 United purchase credit, two United Club one-time passes (street value $118), free first and second checked bags, 25% back on inflight purchases, and 5,000 bonus miles after each anniversary award flight. Run the math and the credits cover the annual fee before you touch miles.

Where MileagePlus shines is partner redemptions, not domestic United metal. The United-to-partner sweet spots, like ANA business class to Tokyo at 88,000 miles one-way and Lufthansa first class to Frankfurt at 110,000 miles one-way, are the redemptions worth saving these miles for. United has not devalued these in years, which is unusual for the industry. Use MileagePlus on partner award charts and skip the domestic Saver redemptions where dynamic pricing has crept in.

JetBlue: JetBlue Plus Card

The JetBlue Plus from Barclays is genuinely underrated. $99 annual fee. Welcome bonus: 50,000 TrueBlue points after $1,000 spend and annual fee payment within 90 days. TrueBlue values vary, but at a 1.3 cpp baseline that bonus is worth around $650.

The card earns 6x on JetBlue purchases (one of the highest co-brand multipliers on the market), 2x at restaurants and grocery, and 1x on everything else. Annual benefits include a 5,000-point anniversary bonus, free first checked bag for you and three companions on JetBlue flights, 50% off inflight food and drinks, and (this is the one that matters for serious TrueBlue collectors) a 10% rebate on every redemption.

That 10% rebate scales with the size of your redemption. Burn 200,000 points on a Mint business class seat and you get 20,000 back. The JetBlue cards are the only ones in the market with this feature. See our JetBlue card guide for the full breakdown.

Alaska: Alaska Airlines Visa Signature Card

The Alaska Airlines Visa is on my short list of "everyone interested in the points game should consider this card at least once." $95 annual fee. Welcome bonus as of April 2026: 60,000 miles plus the Companion Fare after $3,000 spend in 90 days.

The Companion Fare alone is worth $100-$300 per use, depending on the route, and it triggers every cardmember anniversary. Pay $122 in taxes and fees ($22 base plus the partner's tax) and your companion flies with you on a paid Alaska ticket. I have used this benefit on transcontinental Alaska flights where the standalone companion ticket would have been north of $400. The math is silly.

Where Mileage Plan really earns its reputation is partner award redemptions. Alaska's published partner chart still has Cathay Pacific business class to Asia at 50,000 miles one-way, Japan Airlines business class at 60,000 miles one-way, and Qatar Airways business class to the Middle East at 70,000 miles one-way. These are the redemptions worth chasing. Alaska also runs frequent transferable-point bonuses with Bilt, which makes the program feasible to top up even without flying Alaska directly.

The 24-month inactivity rule is real. Use the card once a year and ignore it.

Hawaiian: Hawaiian Airlines World Elite Mastercard

The Hawaiian Airlines World Elite Mastercard from Barclays runs $99 a year. Welcome bonus: 80,000 HawaiianMiles plus a $50 statement credit after $3,000 spend in 90 days, plus a one-time 50% companion discount.

The benefits are narrow (they only matter if you fly Hawaiian), but they're sharp where they count: 50% off inflight purchases, free first checked bag for you and up to eight companions on Hawaiian flights (the biggest co-brand bag perk in the industry), and a $100 companion ticket discount on every cardmember anniversary.

HawaiianMiles shine for inter-island Hawaii flights when cash fares spike on holiday weekends. A $250 cash fare for a 35-minute Honolulu-to-Maui hop becomes 7,500 miles plus $5 in taxes. That's a 3 cpp redemption rate, which is well above the program's average.

The pending Alaska-Hawaiian merger is worth watching. The two programs have not yet integrated, but reciprocal earning is already live. If they consolidate, HawaiianMiles will likely convert into Alaska Mileage Plan miles, which would be a net positive for everyone holding HawaiianMiles. Bank the welcome bonus while the policies are still favorable.

A Quick Note on American Airlines

American is the most popular U.S. carrier whose miles still expire. Twenty-four months of inactivity and they are gone. The program has not budged on this even as competitors have moved on.

If you fly American at all, the Citi AAdvantage Platinum Select at $99 a year is the cheapest insurance policy you can buy. Any purchase resets the activity clock. The card also earns 2x on gas, restaurants, and American purchases, and gets you a free first checked bag and preferred boarding. It is not the card you build a strategy around (the welcome bonus is usually mid), but it is a useful keep-alive tool, and AAdvantage partner redemptions like Cathay Pacific first class and Qatar Qsuites are still worth holding onto.

How I'd Actually Use Non-Expiring Miles

This is the section the standard guides skip. You have programs you can save into indefinitely. What do you actually do with that?

The play I run is concentrated, not diversified. Pick the airline you fly most, open its co-branded credit card, earn the welcome bonus, and use the card for everyday spend until you have enough miles for the redemption you want. Stockpiling 100,000 miles across six different programs is a worse strategy than stockpiling 100,000 miles in one program where you have a clear redemption target.

If you are flexible on airline, my preferences in order of redemption value: Alaska Mileage Plan first (partner sweet spots are unmatched), United MileagePlus second (international business is genuinely a deal), then Delta and Southwest as workhorses for domestic travel.

For the programs that still have inactivity rules (American, Frontier, Spirit), the co-branded card is the keep-alive tool. One purchase a year. That is the entire strategy.

Final Take

The fact that six U.S. airline programs no longer expire miles changes how you should think about earning them. The right move is to be patient. Earn into a program you have a redemption target for, sit on the miles, and burn them on a high-cpp redemption rather than a low-cpp one just to clear inventory.

If you fly Delta most, start with the Delta Gold. If you fly United, start with the Quest. If you are a Southwest loyalist chasing Companion Pass, the Priority is the way in. And if you are aspirational and patient, the Alaska Visa is one of the highest-value $95 cards on the market when you redeem on partners.

Pick one. Open it. Earn the bonus. The miles will wait for you.

This article contains affiliate links. If you apply through our links, we may earn a commission at no cost to you, which helps us continue sharing points and miles strategies with the community.

Some of the links in this article are affiliate links. We may receive a small commission at no extra cost to you if you apply through these links. This helps us keep the site running and continue creating free content.