What a bonus miles credit card actually gives you
A bonus miles credit card is a credit card that offers you a large number of frequent flyer miles upfront when you meet a spending requirement in the first few months. The miles sit in an airline loyalty account under your name, and you can use them to book flights, upgrades, or other travel rewards through that airline's program.
The card itself works like any other credit card — you charge purchases, pay a bill each month, and either pay interest or avoid it by paying in full. The difference is that every dollar you spend earns miles toward that airline, and the bonus gives you a head start. Most bonuses range from 40,000 to 100,000 miles, though the exact amount depends on the card and the current offer.
Miles have real value, but not a fixed dollar amount. A flight that costs 25,000 miles on one date might cost 35,000 miles on another, depending on demand. The same miles might be worth more or less depending on which airline issues the card and which routes you want to fly.
Key Takeaways
- You earn the bonus miles by spending a set amount within a set timeframe — usually $3,000 to $5,000 in the first three months.
- The miles go into your frequent flyer account with the airline, not into a separate account held by the credit card company.
- You can use miles to book flights, seat upgrades, or other rewards through the airline's website, but availability and pricing change constantly.
- Annual fees range from $0 to $550 depending on the card, and the bonus value must exceed the fee to make the card worthwhile for you.
- Miles do not expire as long as you have account activity with the airline at least once every 12 to 24 months, depending on the airline.
How to earn the bonus and what the spending requirement means
The bonus is not automatic. You must spend a minimum amount on the card within a specific window — usually the first three months after opening the account. Common thresholds are $3,000, $4,000, or $5,000. Only purchases count; balance transfers, cash advances, and fees do not.
Once you hit that threshold, the miles post to your frequent flyer account within one to three billing cycles. The card issuer tracks your spending automatically, so you do not need to submit proof or contact anyone. You will see the miles appear in your airline account online.
If you do not meet the spending requirement within the window, you do not receive the bonus. There is no partial credit — you either hit the target or you do not. This is why it matters to choose a card whose spending requirement matches what you would spend anyway in that timeframe.
Understanding annual fees and whether the bonus covers them
Many bonus miles cards charge an annual fee, ranging from $0 to $550 per year. Premium cards with higher bonuses and extra perks (like lounge access or statement credits) typically cost more. No-annual-fee cards exist but usually offer smaller bonuses.
The bonus is only valuable if it exceeds what you pay in fees. A card with a $95 annual fee and a 50,000-mile bonus is not a good deal if those 50,000 miles are worth only $600 to you in actual flight value — you would be paying $95 to get $600 in value, which is fine. But if the miles are worth only $400, you are paying $95 to get $400, which loses money.
Miles value varies widely. A rough estimate is $0.01 per mile, but premium cabin flights and peak-season routes can be worth $0.02 or more per mile, while off-peak economy flights might be worth $0.005 per mile. The only way to know what your miles are worth is to look at actual flights you want to book on the airline's website.
How to use your miles once you have them
Log into your frequent flyer account on the airline's website. Search for a flight using the "book with miles" or "award travel" option instead of the regular booking tool. The system will show you which flights are available for miles and how many miles each one costs.
Availability is limited. Popular routes and peak travel dates often have few or no award seats available, even if the flight itself is not full. Off-peak flights and less popular routes are usually easier to book. You can also use miles for seat upgrades on flights you have already booked with cash, though upgrade availability is also limited and changes by flight.
Some airlines let you transfer miles to hotel or car rental partners, or use them for other rewards like gift cards. Check your specific airline's program to see what options are available. Transfer partners vary by airline and change over time.
When miles expire and how to keep them active
Most airlines do not let miles expire as long as you have account activity at least once every 12 to 24 months. Activity includes flying on that airline, earning miles through a credit card, or transferring miles in or out. straightforward holding the card and paying the annual fee usually counts as activity, though this varies by airline.
If your account goes inactive and miles expire, you may be able to reactivate them by paying a fee — usually $25 to $100 — but this is not may provide. The safest approach is to use or transfer your miles before they are at risk of expiring, or to keep your frequent flyer account active by using the airline's credit card or flying occasionally.
Check your specific airline's policy on their website, because expiration rules differ. Some airlines are stricter than others, and policies change.
Comparing bonus offers across different airlines and cards
The same airline often offers multiple cards with different bonuses, annual fees, and perks. A United card might offer 50,000 miles with a $95 fee, while another United card offers 75,000 miles with a $450 fee. The higher bonus does not automatically mean better value — it depends on the fee and what you will actually use.
Different airlines have different award pricing and availability. Southwest miles, for example, are worth roughly the same on any Southwest flight because Southwest prices awards by dollar amount, not by demand. Delta and United use dynamic pricing, meaning the same route costs different miles depending on when you book and how full the flight is.
Before choosing a card, search the airline's website for flights you actually want to take and note how many miles they cost. This tells you whether the bonus will get you a free flight or just a partial one. A 50,000-mile bonus is worthless if the cheapest flight you want costs 75,000 miles.
What happens if you close the card or stop using it
Closing a bonus miles card does not automatically erase your miles. The miles stay in your frequent flyer account as long as you keep that account active. However, closing the card means you stop earning miles on new purchases, and you lose any perks the card offered (like lounge access or statement credits).
If you close the card and do not fly or use the airline in any other way for 12 to 24 months, your miles may expire. To keep them, either use the airline occasionally, transfer them to a partner, or open a different card with the same airline to keep the account active.
Some people open a bonus miles card, earn the bonus, use the miles for a flight, and then close the card before the annual fee renews. This is a common strategy and is not against the rules, though some airlines may limit how often you can open new cards with them.
Frequently Asked Questions
Do I have to fly to use the miles?
No. You can book a flight for someone else using your miles, transfer miles to a travel partner, or use them for seat upgrades, hotel stays, or car rentals depending on what your airline offers. You do not have to be the passenger on the flight.
What if I cannot meet the spending requirement?
You will not receive the bonus. Some people meet the requirement by timing large planned purchases (like holiday shopping or home repairs) to fall within the bonus window, or by putting regular bills on the card temporarily. Do not spend money you would not otherwise spend just to reach the threshold.
Can I get the bonus more than once with the same airline?
Most airlines have rules limiting how often you can earn a bonus on the same card. Common rules are one bonus per card per lifetime, or one bonus per 24 months. Check the specific card's terms before explore, because these rules change and vary by airline.
Are miles taxed as income?
The IRS generally does not tax miles earned through credit card spending or sign-up bonuses as long as you use them for personal travel. If you sell miles or use them for business purposes, tax treatment may differ. Consult a tax professional about your specific situation.
What if the airline devalues its miles after I earn the bonus?
Airlines change award pricing regularly, usually making flights cost more miles over time. Once you have earned miles, they are yours to use at the current price. If you wait to book, prices may go up, but you cannot lose miles you already have due to a devaluation.