Miles are a currency your credit card issuer gives you for spending
When you use a rewards credit card, the issuer tracks how much you spend and converts a portion of it into miles — a form of currency you can redeem for flights, hotel stays, or other purchases. The conversion rate is fixed: most cards give you 1 mile per dollar spent, though some premium cards offer 2 or 3 miles per dollar on certain categories like airfare or dining.
Miles live in an account tied to your credit card. You do not receive them as cash or points in your hand — they accumulate in a digital balance that the card issuer manages. You can check your balance online through your card's website or app, the same way you check your statement.
The miles themselves have no fixed dollar value. A mile is worth whatever a merchant will trade for it. On some airlines, 1 mile might be worth 1 cent toward a flight; on others, it might be worth 0.5 cents or 2 cents depending on the route and how you redeem. This is why the same 50,000 miles can buy you a domestic flight on one airline but only a short regional flight on another.
Key Takeaways
- Miles accumulate in an account managed by your card issuer based on how much you spend, usually at a rate of 1 mile per dollar.
- You redeem miles through the card issuer's website or app by booking a flight, hotel, or other redemption option directly.
- The value of a mile varies by airline, route, and redemption method — the same miles can be worth different amounts depending on what you book.
- Miles expire if your account is closed or inactive for a set period, which varies by card issuer but is often 12 to 24 months.
- You can transfer miles to airline partners, combine miles from multiple cards, or use them for non-travel purchases, depending on your card's rules.
How to redeem miles for flights and hotels
To redeem miles, log into your credit card account online or through the mobile app. Look for a "Rewards" or "Travel" section — the exact name depends on your issuer. From there, you can search for flights or hotels by date and destination, just as you would on a booking website like Kayak or Expedia.
When you find a flight or hotel you want, the system will show you the miles cost. You can then choose to pay entirely in miles, or use a combination of miles and cash if the option is available. Once you confirm, the miles are deducted from your account when ready, and your booking is confirmed. You receive a confirmation number and can check in or manage your reservation through the airline or hotel's own website.
Some cards also let you transfer miles to airline or hotel partners. For example, if your card is issued by Chase, you might transfer Chase points to United, Hyatt, or another partner. The transfer is usually when ready or takes a few hours. Once the miles land in the partner's account, you can book directly through that airline or hotel using their website.
Why the same miles are worth different amounts
Miles do not have a set price because airlines and hotels set their own redemption rates. A domestic flight might cost 25,000 miles on one airline but 30,000 on another, even if the flights are similar. Premium routes — say, a flight from New York to London in business class — might cost 100,000 or more miles because the airline knows those seats are expensive to buy with cash.
The time of year also affects the cost. Peak travel seasons (summer, holidays) often require more miles than off-peak travel. Some airlines use "dynamic pricing," meaning the miles cost changes based on demand, just like cash prices do.
This is why people who use miles strategically try to book off-peak flights or shorter routes, where their miles stretch further. A 50,000-mile balance might cover a round-trip domestic flight in January but only a one-way flight in July on the same airline.
When miles expire and how to keep them active
Miles do expire, but the rules vary by card issuer and airline. Most major card issuers will close your miles account and erase your balance if your account is inactive for 12 to 24 months. "Inactive" usually means you have not used the card or earned miles during that period — it does not mean you have to redeem miles.
To keep miles from expiring, the simplest approach is to use your card occasionally. Even a small purchase counts as activity. Some issuers also let you extend the expiration date by transferring miles to an airline partner or by redeeming a small amount.
If your miles do expire, you generally cannot recover them. Some issuers will reinstate expired miles if you call and ask, but this is not may provide and depends on their policy. The safer approach is to check your account balance every few months and use your card at least once or twice a year if you are not actively redeeming.
Sign-up bonuses and how they add to your miles balance
Many rewards credit cards offer a sign-up bonus — a large number of miles deposited into your account after you meet a spending requirement, usually within the first few months of opening the card. A typical bonus might be 50,000 miles if you spend $3,000 in the first three months.
The bonus miles work exactly like miles you earn from regular spending. They sit in your account and can be redeemed for flights, hotels, or other options. The bonus is often the most valuable part of a rewards card because it gives you a large balance to work with right away, without having to spend years accumulating miles.
Once you meet the spending requirement, the bonus is usually posted within one to two billing cycles. You can then redeem it when ready or let it accumulate with miles you earn from ongoing spending.
Other ways to use miles besides flights and hotels
Most card issuers let you redeem miles for more than just travel. Common options include:
- Cash back: Redeem miles for a statement credit or direct deposit to your bank account, usually at a lower value than travel redemptions.
- Car rentals: Book through the card issuer's travel portal.
- Dining and entertainment: Some issuers partner with restaurants or concert venues.
- Shopping: Redeem miles for gift cards or purchases through the issuer's shopping portal.
- Transfers to partners: Move miles to airline or hotel partners, or sometimes to other credit card programs.
The value of miles for non-travel redemptions is usually lower than for flights. For example, redeeming 50,000 miles for a $500 cash credit means each mile is worth 1 cent, whereas the same miles might book a flight worth $600 or more. This is why people who want to maximize their miles focus on travel redemptions.
What happens to miles if you close your card or miss a payment
If you close your credit card account, your miles typically remain in your account for a set period — often 12 to 24 months — before expiring. You can still redeem them during this window, even though the card itself is closed. Check your issuer's specific policy, because some issuers let you keep miles longer if you have other accounts with them.
If you miss a payment or your account goes into default, the issuer may close your account and your miles may be forfeited. The exact consequences depend on the card issuer's terms. To protect your miles, keep your account in good standing and make at least the minimum payment on time.
If you are planning to close a card, redeem your miles before you do, or confirm with the issuer how long you have to use them after closing.
Frequently Asked Questions
Can I combine miles from different credit cards?
Not directly — each card issuer maintains separate mile accounts. However, if you have multiple cards from the same issuer (for example, two Chase cards), you can usually combine the miles into one account. If your cards are from different issuers, you cannot merge the balances, but you can redeem from each account separately or transfer miles to a common airline partner.
What is the difference between miles and points?
Miles and points are both reward currencies, but miles are typically associated with travel cards and airline partnerships, while points are more general. In practice, they work the same way — you earn them from spending, they accumulate in an account, and you redeem them for rewards. Some issuers use the terms interchangeably.
Do I have to pay taxes on miles I earn?
The IRS generally does not tax miles you earn from credit card spending, because they are considered a rebate on your purchase. However, if you receive a large sign-up bonus, some tax professionals recommend keeping records in case the IRS ever changes this position. Consult a tax advisor if you have concerns about your specific situation.
Can I sell my miles to someone else?
Most card issuers prohibit selling or transferring miles to another person. Your miles are tied to your account and cannot be moved to someone else's name. Some issuers allow you to use miles to book a ticket for another person, but the miles must stay in your account.
How do I know if a flight redemption is a good deal?
Divide the miles cost by the cash price of the same flight. If the result is 1 cent per mile or higher, the redemption is generally considered good value. For example, if a flight costs 50,000 miles and would cost $600 in cash, that is 1.2 cents per mile. If the same flight costs 60,000 miles, that is 1 cent per mile — a weaker deal. Tracking these ratios helps you decide when to redeem and when to save miles for better opportunities.