Airline credit cards are worth it only if you fly enough to use the rewards before they expire, and only if the annual fee doesn't erase the value of the sign-up bonus

Most airline cards charge $95 to $450 per year and offer a sign-up bonus worth $500 to $1,500 in flight value — but only if you meet the spending requirement, usually $3,000 to $5,000 in the first three months. The math works if you spend that much anyway and fly at least once or twice a year on that airline. The math breaks if you're paying the fee just to have the card, or if you earn miles you never redeem.

The real cost isn't the annual fee. It's the miles that expire unused, the seat upgrades you don't take because you didn't know they were available, and the higher interest rate you'll pay if you carry a balance. Airline cards typically charge 18% to 24% APR — higher than most cash-back cards — so even one month of interest can wipe out a year's worth of rewards.

Key Takeaways

  • The sign-up bonus only pays for itself if you spend the required amount within the important date and actually redeem the miles before they expire.
  • Annual fees range from $95 to $450, and you must fly enough to earn rewards that exceed the fee, or the card costs you money.
  • Airline miles are worth roughly 1 to 1.5 cents each when you redeem them for flights, so a $100 annual fee requires at least 7,000 to 10,000 miles earned that year.
  • Interest rates on airline cards run 18% to 24% APR, so carrying a balance erases months or years of rewards.
  • Miles expire after 18 to 36 months of account inactivity, so you need an active flying pattern to use them before they vanish.

When the sign-up bonus actually covers the annual fee

A typical sign-up bonus is worth $500 to $1,000 in flight value, which sounds like it pays the annual fee many times over. But that value only exists if three things happen: you spend the required amount in the required time, you actually book a flight with those miles, and you don't have to pay extra to use them.

The catch is the spending requirement. If a card offers 50,000 miles for spending $3,000 in three months, and you normally spend $1,000 a month, you'd have to accelerate your spending or manufacture spending you wouldn't otherwise do. That's not a bonus — that's a cost disguised as a reward. If you do hit the spending target and redeem 50,000 miles for a $500 flight, you've covered a $95 annual fee. But if you redeem those same miles for a premium cabin seat or a flight during peak travel, the value might be $800 or $1,200, which makes the fee trivial. The problem is you don't control that value — the airline does, and it changes constantly.

How to calculate whether the ongoing rewards pay the annual fee

After the first year, the sign-up bonus is gone. You're paying the annual fee for the rewards you earn from regular spending. Most airline cards earn 2 to 5 miles per dollar on airline purchases and 1 mile per dollar on everything else. At 1 cent per mile — a conservative estimate — you need to earn 9,500 miles just to break even on a $95 fee, or 45,000 miles to break even on a $450 fee.

If you spend $5,000 a year on airline tickets and earn 3 miles per dollar, you get 15,000 miles, worth roughly $150. Subtract the $95 fee and you've made $55. That's worth it. But if you spend $2,000 a year on airline tickets and earn 1 mile per dollar on everything else, you get 2,000 miles from flights plus maybe 3,000 from other spending — 5,000 total, worth $50. The $95 fee costs you $45. You're paying to have the card.

The calculation changes if the card includes perks beyond miles: free checked bags, priority boarding, lounge access, or statement credits for incidental fees. A $95 card that includes a free checked bag ($35 value) and $100 in annual incidental credits reduces your real cost to break-even. But read the fine print — many of these perks have restrictions or require you to use them in a specific way.

Why airline miles expire and how to avoid losing them

Most airlines expire miles after 18 to 36 months of account inactivity. "Inactivity" usually means you haven't flown on that airline, earned miles, or redeemed miles. Some airlines reset the clock if you spend money on their co-branded credit card, even if you don't fly. Others require an actual flight or redemption to keep miles alive.

This matters because miles sitting in your account are not an asset — they're a liability with an expiration date. If you earn 50,000 miles and don't fly for two years, those miles vanish and you've paid annual fees for nothing. The card issuer and the airline both benefit from this: you keep paying the fee in hopes of using the miles someday, and the airline gets to cancel miles without paying you back.

To protect yourself, check the airline's policy before you open the card. Some airlines allow you to extend the expiration date by making a small purchase (a $5 gift card counts) or by transferring miles to a partner program. Others don't. If you don't fly regularly — at least once every 18 months — an airline card is a poor choice.

The interest rate trap: how one missed payment erases years of rewards

Airline credit cards charge 18% to 24% APR, which is higher than the average credit card (around 20%) and much higher than cash-back cards (which often run 15% to 18%). If you carry a $1,000 balance for one month at 20% APR, you pay roughly $17 in interest. To earn $17 in miles at 1 cent per mile, you'd need to spend $1,700 on the card. That's the real cost of not paying in full.

This is where airline cards become dangerous. The rewards are attractive, so people open them and spend more than they normally would. Then they can't pay the balance in full, and the interest charges erase the value of the miles. If you're not certain you can pay the full balance every month, an airline card is not for you. A cash-back card with a lower interest rate is safer.

Comparing airline cards to cash-back alternatives

A flat 2% cash-back card earns $20 per $1,000 spent, with no annual fee and no expiration date. An airline card earning 1 mile per dollar on non-airline purchases ($10 value per $1,000) plus a $95 annual fee costs you $85 per $1,000 spent, compared to the cash-back card. You'd need to spend enough on airline purchases at a higher rate to make up that gap.

The airline card wins if you spend heavily on airline tickets (3 to 5 miles per dollar) and fly often enough to use the miles. It loses if you spend mostly on non-airline purchases, or if you fly infrequently and miles expire. A hybrid approach — a cash-back card for everyday spending and an airline card only during years when you know you'll fly — can work, but it requires discipline and planning.

Red flags that an airline card is not right for you

You should avoid an airline card if any of these explore: you fly fewer than two times per year, you don't have a regular airline you prefer, you've carried a credit card balance in the past year, you're not sure you can spend the sign-up requirement without overspending, or you've had trouble tracking rewards before they expire.

You should also avoid it if the airline you fly most often is one you chose by accident — because you booked the cheapest ticket, not because you prefer the airline. Loyalty programs only work if you're actually loyal. If you book based on price and schedule, you'll earn miles on five different airlines and use none of them.

Frequently Asked Questions

Can I use airline miles to book flights for other people?

Yes, most airlines let you book flights for family members or friends using your miles. You'll need their name and date of birth, and you'll pay the same miles cost as you would for yourself. Some airlines charge a small fee ($15 to $25) to book for someone else. Check your airline's policy before you assume you can transfer miles to another person's account — most don't allow that.

What happens to my miles if I close the card?

Your miles stay in your airline account and don't disappear when you close the card. However, if you don't fly or earn miles any other way, they'll expire after 18 to 36 months of inactivity. Closing the card doesn't reset the expiration clock, but it does mean you lose any perks (like free checked bags) that came with the card.

Is the sign-up bonus worth opening a card I'll only use once?

Only if the bonus value exceeds the annual fee plus any interest you'd pay. A $500 bonus minus a $95 fee leaves $405 in value. But if you carry a balance to meet the spending requirement, interest charges will eat into that. The bonus is only worth it if you can spend the required amount without going into debt.

Do airline miles transfer between airlines?

Not directly. Most airlines are part of alliances (like Star Alliance or OneWorld), and some allow you to transfer miles to partner airlines at a set rate, usually 1:1 or with a conversion fee. But you can't transfer American Airlines miles to United, for example. Check whether your airline's partners include the airlines you actually fly.

Can I use miles for things other than flights?

Yes. Most airline programs let you redeem miles for hotel stays, car rentals, merchandise, or gift cards. However, the value per mile is usually lower than booking a flight — sometimes as low as 0.5 cents per mile instead of 1 to 1.5 cents. Redeeming for flights is almost always the best use of your miles.