What an airline credit card does, and what it costs you

An airline credit card is a rewards card issued by a bank in partnership with an airline — American, Delta, United, Southwest, and others each have their own versions. When you use the card to buy anything, you earn points or miles that you can redeem for flights, seat upgrades, or other travel perks. The card also usually gives you a sign-up bonus: a large chunk of miles just for opening the account, often enough for a domestic flight.

The catch is the annual fee. Most airline cards charge between $95 and $550 per year, depending on the card and the airline. You pay this whether you use the card or not. The card issuer — usually Chase, American Express, or Citi — makes money from the annual fee, from a percentage of every purchase you make (called the interchange fee, which the merchant pays), and from interest if you carry a balance.

The math only works in your favor if you fly enough to use the miles, or if the perks (like a free checked bag or priority boarding) save you money that exceeds the annual fee. If you fly once a year or not at all, the card costs you money.

Key Takeaways

  • Airline cards charge an annual fee ranging from $95 to $550, and you owe this fee every year regardless of how much you use the card.
  • The sign-up bonus is real value, but only if you can meet the spending requirement (usually $1,000 to $5,000 in the first few months) without overspending.
  • Miles have real value only if you actually book flights with them; miles that expire or go unused are money you threw away.
  • Carrying a balance on the card at the card's interest rate (typically 18% to 24% APR) erases any rewards value when ready.
  • Comparing the annual fee, the earning rate, and your actual flying habits is the only way to know whether the card saves you money.

How miles and points actually work

When you use an airline card, you earn miles or points per dollar spent. The earning rate varies: you might earn 1 mile per dollar on everyday purchases and 3 or 4 miles per dollar on airline tickets or dining. A sign-up bonus might offer 50,000 miles after you spend $3,000 in three months.

Those miles can be redeemed for flights on the airline or its partners. A domestic flight might cost 25,000 to 50,000 miles depending on the route and how far in advance you book. An international flight might cost 60,000 to 150,000 miles. You can also use miles for seat upgrades, checked baggage fees, or other travel expenses.

The real value of a mile is not fixed. Airlines change how many miles a flight costs, and they often increase the price over time. A flight that cost 25,000 miles five years ago might cost 35,000 miles today. This is called devaluation, and it happens regularly. You cannot count on miles being worth the same amount next year.

Miles also expire if you do not use them. Most airlines let your miles sit indefinitely as long as you have some account activity (like earning or redeeming miles) at least once every 12 to 24 months. If your account goes dormant, the airline can delete your miles. Using the card to buy something counts as activity, so the annual fee actually keeps your miles alive if you are not flying.

Sign-up bonuses and the spending trap

The sign-up bonus is the biggest reward you get from an airline card. A typical offer is 50,000 miles after you spend $3,000 in the first three months. If that flight is worth $400 to $600 in cash, the bonus alone can justify opening the card — even after paying the annual fee.

The trap is the spending requirement. If you do not normally spend $3,000 in three months, you have to choose: either put normal expenses on the card (which is fine), or spend money you would not otherwise spend just to hit the bonus. Spending extra money to earn miles is a loss, not a win. The miles are worth less than the cash you spent.

Before opening any airline card, add up what you actually spend in a typical three-month period. If that number is already above the requirement, the bonus is information programs. If you have to stretch to hit it, skip the card or wait until you have a big planned expense (a home repair, a car purchase, a wedding gift) that you can put on the card.

Annual fees and perks that might offset them

The annual fee is the biggest ongoing cost. A $95 card might seem cheap, but a $550 card (like the American Express Platinum or Chase Sapphire Reserve) needs to deliver real value to be worth it.

Many airline cards come with perks designed to offset the fee. Common ones include a free checked bag on flights with that airline, priority boarding, a statement credit toward baggage fees or seat upgrades, lounge access, or a free companion ticket after you spend a certain amount. Some cards offer a credit toward Global Entry or TSA PreCheck (which costs $100 to $130 every five years).

The math is straightforward: add up the cash value of the perks you will actually use in a year, then subtract the annual fee. If you fly four times a year and the free checked bag saves you $30 per trip, that is $120 in value. If the annual fee is $95, you come out $25 ahead — before counting any miles you earn. If you do not fly, the perks are worthless and the fee is pure cost.

Interest rates and the cost of carrying a balance

Airline cards charge interest on balances you do not pay off in full each month. The rate is typically 18% to 24% APR, which is standard for rewards cards. If you carry a $1,000 balance for a year, you pay $180 to $240 in interest alone.

This interest erases any rewards value. If you earn 2 miles per dollar on a $1,000 purchase, you get 2,000 miles. If those miles are worth $20 to $30, but you paid $180 in interest, you lost money. Never open an airline card if you plan to carry a balance. The card only makes sense if you pay the full statement balance every month.

Comparing airline cards to cash-back cards

A cash-back card might be a better choice than an airline card, depending on how much you fly. A cash-back card with no annual fee gives you 1% to 2% back on all purchases. That is real money in your account, not miles that might be devalued or expire.

An airline card makes sense if you fly enough to use the miles, or if the perks (like free checked bags) save you money. If you fly once a year or less, a cash-back card with no annual fee is almost always better. You get rewards on every purchase without paying a fee.

Some people use both: a cash-back card for everyday spending and an airline card for flights and airline-related purchases. This works only if you can manage multiple cards and pay each one in full every month.

How to decide whether an airline card is worth it

Start with your flying habits. How many flights do you take per year? How much do you typically spend on airfare? Do you fly the same airline most of the time, or do you switch between airlines?

If you fly the same airline four or more times per year, an airline card might pay for itself through perks and miles. If you fly once a year or less, or if you split your flying between multiple airlines, a cash-back card is probably better.

Next, check whether you can meet the sign-up bonus spending requirement without overspending. Add up your normal spending for three months. If that number is above the requirement, the bonus is worth pursuing. If you have to stretch, wait for a time when you have a planned large expense.

Finally, calculate the annual fee against the perks. Write down the perks you will actually use (not the ones that sound nice), estimate their cash value, and subtract the annual fee. If the number is positive, the card might be worth it. If it is negative or close to zero, the card is not a good fit.

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 typically need the passenger's name and date of birth. Some airlines charge a small fee to book for someone else, and some restrict which routes you can book for non-account holders.

What happens to my miles if I close the card?

Closing the card does not automatically delete your miles. Your miles stay in your airline account as long as you have account activity (like earning or redeeming miles) at least once every 12 to 24 months. If your account goes dormant, the airline can delete the miles. You can keep the miles alive by using a different card from the same airline or by booking a flight.

Do airline miles expire?

Miles do not expire as long as your account stays active. Activity includes earning miles, redeeming miles, or using any card from that airline. If your account goes dormant for 12 to 24 months (depending on the airline), the airline can delete your miles. Paying the annual fee on the card counts as activity and keeps your account alive.

Is the sign-up bonus worth opening a card I will not use?

Only if you can use the miles before they expire or your account goes dormant. If you open a card, get the bonus, and then never use the card or the miles, you have wasted the annual fee. The bonus is only valuable if you actually redeem the miles for a flight or other travel benefit.

Can I get the sign-up bonus again if I close and reopen the card?

Most airlines and card issuers have rules against this. You typically cannot get the bonus again if you have received it in the past 24 months, or if you currently hold or have recently held the same card. The rules vary by card and airline, so check the terms before closing an account.