What airmiles are and how you earn them
Airmiles are points or miles you accumulate when you use a credit card, usually at a rate of one mile per dollar spent. Some cards earn more — two miles per dollar on flights, for example, or five miles per dollar on dining. You don't pay extra to earn them; they're built into how the card works. The card issuer partners with airlines or a central airmiles program, and your spending feeds into that account.
The miles sit in an account tied to your card. You can see your balance online or through a mobile app. When you have enough miles, you transfer them to an airline partner or redeem them directly through the card issuer's travel portal for flights, seat upgrades, or sometimes hotel stays.
Different cards earn at different rates and in different categories. A card might earn one mile per dollar on everything, or it might earn five miles per dollar on airfare purchases and one mile per dollar on everything else. The card's terms spell out exactly where you earn more.
Key Takeaways
- Airmiles accumulate as you spend on your card, but the number of miles needed for a free flight varies widely — typically 25,000 to 60,000 miles for a domestic flight depending on the airline and route.
- The real value of a mile depends on which airline you fly with and how you book; a mile might be worth 1 cent or 2 cents, or sometimes much less on expensive routes.
- Annual fees on airmiles cards often run $95 to $450, so you need to earn enough miles to cover that cost before you come out ahead.
- Airmiles expire if you don't use your card for a set period (often 12 to 24 months), so dormant accounts can wipe out your balance.
- Booking directly with miles through an airline often costs more miles than transferring to a partner airline, so comparing options before you redeem matters.
How many miles you need for a flight
The number of miles required for a free flight depends on the airline and the route. Most domestic flights in the United States cost between 25,000 and 60,000 miles. International flights typically start at 40,000 miles and can reach 150,000 or more for premium cabins or long routes.
Airlines use a dynamic pricing model, which means the same route can cost different amounts of miles depending on demand and availability. A flight from New York to Los Angeles might cost 30,000 miles on a Tuesday in February but 50,000 miles on a Friday in July. You can't lock in a price; you book when you find availability at the rate shown.
Some airlines publish award charts that show fixed prices for specific routes, but many have moved away from these. Check the airline's website directly to see what a particular flight costs in miles before you assume your balance will cover it.
What a mile is actually worth
The value of a single mile varies. If a flight costs 30,000 miles and the ticket would cost $300 to buy outright, each mile is worth about 1 cent. If the same flight costs 50,000 miles, each mile is worth 0.6 cents. On premium cabin bookings or expensive routes, a mile can be worth 2 cents or more. On short, cheap routes, it might be worth less than 0.5 cents.
This matters because it determines whether earning miles on your card actually saves you money. If you're paying a $95 annual fee to earn miles worth 0.7 cents each, you need to redeem at least 13,571 miles just to break even on the fee. If you only spend $5,000 a year on the card and earn one mile per dollar, you'd earn 5,000 miles — not enough to cover the fee.
The value also depends on how you redeem. Transferring miles to a partner airline often gives you better value than booking directly through the card issuer's portal. A mile transferred to Lufthansa might be worth 1.5 cents, while the same mile booked through the card issuer's website might be worth 0.8 cents.
Annual fees and whether they make sense
Most airmiles cards charge an annual fee between $95 and $450. Some waive the first year, but you pay it every year after that unless you close the card. A few premium cards charge $550 or more and include perks like airline credits or lounge access that can offset the fee.
To decide if a card's fee is worth it, calculate how much you'd need to spend to earn enough miles to cover it. If a card charges $95 and earns one mile per dollar, you need to spend $9,500 a year just to break even. If you spend $3,000 a year, the fee costs you money no matter how many miles you earn.
Some cards offer a statement credit toward airfare or airline fees that can reduce the effective cost. A $450 card might include a $200 annual airline credit, bringing your real cost down to $250. Read the card's benefits carefully to see what's actually included.
How miles expire and what happens if you don't use your card
Most airlines expire miles if your account is inactive for 12 to 24 months. "Inactive" usually means you haven't earned or redeemed any miles during that time. If you stop using your card, your miles can disappear even if you have a large balance.
Some card issuers let you keep miles active by making any purchase on the card, even a small one. Others require you to actually earn miles — a single $1 purchase might not count. Check your card's terms to see what keeps your account active.
If your miles are about to expire, you can sometimes extend the expiration date by redeeming a small amount or transferring miles to a partner program. Some airlines let you reactivate expired miles if you contact them, though this isn't may provide. The safest approach is to use your card regularly or redeem your miles before they expire.
Comparing airmiles cards and choosing the right one
Airmiles cards differ in earning rates, annual fees, and which airlines they partner with. A card might earn three miles per dollar on flights booked directly with the airline and one mile per dollar on everything else. Another might earn two miles per dollar on all purchases. A third might earn five miles per dollar on dining and one mile per dollar everywhere else.
The best card for you depends on where you spend money and which airlines you fly. If you fly Delta frequently and eat out often, a Delta card that earns five miles per dollar on dining might be better than a general-purpose card. If you fly different airlines and want flexibility, a card that transfers to multiple airline partners gives you more options.
Look at the card's sign-up bonus as well. Many cards offer 50,000 to 100,000 bonus miles if you spend a certain amount in the first three months. That bonus alone might cover several flights, but only if you were planning to spend that money anyway. Don't spend more than you normally would just to hit a bonus threshold.
How to redeem your miles for flights
Once you have enough miles, you can redeem them through the airline's website, the card issuer's travel portal, or by calling the airline. The process is straightforward: search for your flight, select it, and choose to pay with miles instead of cash.
Before you book, compare the cost in miles across different options. Booking directly through the airline's website often costs more miles than transferring your miles to a partner airline and booking through that partner. Some card issuers let you see multiple airline options in their portal, which can save you time.
You can also use miles for seat upgrades, checked baggage fees, or airline fees like change fees. These redemptions often give you poor value — a $25 baggage fee might cost 2,500 miles, which is worth far more than $25 if your miles are worth 1 cent each. Reserve your miles for flights where the value is highest.
Frequently Asked Questions
Can I transfer my miles to someone else?
Most airlines allow you to transfer miles to a family member or friend, but the process varies. Some charge a fee per transfer, and some require the recipient to be a household member. Check your airline's website for their specific transfer policy. You cannot sell your miles, though some third-party sites claim to broker sales — these are often scams.
What happens to my miles if I close my credit card?
Closing the card doesn't automatically erase your miles. Your miles stay in your airline account as long as you keep that account active. However, if you don't use the airline account for 12 to 24 months, the miles may expire. Keep the account active by earning or redeeming miles occasionally, even if you're not using the credit card anymore.
Are airmiles better than cash back?
It depends on your spending and travel habits. If you fly frequently and can redeem miles at high value (1.5 cents or more per mile), airmiles may be better. If you rarely fly or only take cheap flights, cash back cards often deliver more value because you don't have to worry about expiration or dynamic pricing. Calculate the value of miles on routes you actually fly before deciding.
Can I use miles to book hotels or rental cars?
Some airmiles cards let you redeem miles for hotels, rental cars, or other travel through their portal, though the value is usually lower than booking flights. You can also transfer miles to airline partners that have hotel or car rental programs. Read your card's redemption options to see what's available.
Do I have to pay taxes on airmiles I earn?
The IRS generally does not tax miles you earn through normal credit card spending, since they're considered a rebate or discount on your purchase. However, if you receive a large bonus of miles as a sign-up offer, the IRS may consider that taxable income in rare cases. Consult a tax professional if you're unsure about your specific situation.