Which Airline Credit Card Actually Gets You the Most Miles

The best airline card depends on how you fly and where you bank

There is no single "best" airline credit card because the right one for you depends on three things: which airline you fly most often, how much you spend each month, and whether you value miles or cash back more. A card that earns 3 miles per dollar on flights might be worthless if you never fly that airline. A card with a $550 annual fee makes sense only if you'll earn enough miles to cover it. The card that looks best on paper often isn't the one that gets you a free ticket fastest.

The main choice is between airline-branded cards (issued by a specific airline like United or Delta) and general rewards cards (issued by Visa, Mastercard, or American Express that let you earn miles with any airline). Airline cards usually offer bigger sign-up bonuses and earn more miles per dollar on that airline's flights. General rewards cards are more flexible—you can move miles between airlines or use them for other things—but they typically earn fewer miles per dollar.

Key Takeaways

• Airline-branded cards earn the most miles on that specific airline's flights and tickets, but only if you fly that airline regularly enough to justify the annual fee.
• Sign-up bonuses on airline cards often cover the annual fee in the first year, but you need to spend the required amount within the time limit to get them.
• General rewards cards from Amex, Chase, or Citi let you earn miles with any airline and are better if you split your flying between multiple carriers.
• The miles you earn are only valuable if you can actually use them—check your airline's award chart to see what flights cost before opening a card.
• Annual fees range from $0 to $550, and the higher-fee cards only make sense if you fly enough to earn back the fee in miles or perks within a year.

How airline-branded cards work and what they cost

An airline-branded card is issued directly by the airline (or in partnership with a bank like Chase or Bank of America) and earns miles only with that airline. When you use the card to buy a ticket on that airline, you typically earn 2 to 5 miles per dollar spent. You also earn miles on other purchases—usually 1 mile per dollar on everything else—but the real value is on airline purchases.

Most airline cards charge an annual fee, usually between $95 and $550. The card issuer counts on you earning enough miles to make up for it. For example, a $95 annual fee might be offset by a sign-up bonus of 50,000 miles (worth roughly $500 to $750 in free flights, depending on the airline). Many cards also waive the first year's fee, so you pay nothing in year one and decide whether to keep it based on what you've earned.

Beyond the sign-up bonus, airline cards often include perks like a free checked bag on your airline, priority boarding, or a statement credit toward seat upgrades. These perks are designed to be worth money—a free checked bag saves you $30 to $40 per round trip. If you fly four times a year, that's $120 to $160 in value before you've even earned a single mile.

Sign-up bonuses: how they work and what you actually need to do

A sign-up bonus is a lump sum of miles the card issuer gives you after you meet a spending requirement. A typical offer might be "50,000 bonus miles after you spend $3,000 in the first three months." This means you have to put $3,000 in purchases on the card within 90 days to get the 50,000 miles. If you don't hit $3,000, you get nothing.

The spending requirement is real and it matters. Before you open a card, think honestly about whether you'll spend that amount anyway. If the requirement is $5,000 and you normally spend $2,000 a month, you'll hit it in three months just by using the card for regular purchases. If you normally spend $500 a month, you'll have to change your spending habits or put planned expenses on the card early to may have access to. Some people manufacture spending by paying bills or buying gift cards, but that defeats the purpose—you're paying interest or fees to earn miles that might not be worth it.

The bonus miles are usually posted to your account within one to two weeks after you meet the requirement. You can use them right away to book flights. The catch: most airlines require you to book through their website or call their reservations line. You can't use miles on third-party booking sites like Kayak or Google Flights.

General rewards cards: flexibility over maximum miles

A general rewards card earns miles (or points) that you can use with any airline, or sometimes transfer to airline partners. These cards are issued by major payment networks—American Express, Chase, Visa, or Mastercard—rather than by an airline. The most common ones are the Chase Sapphire Preferred, American Express Gold Card, and Citi Prestige.

The advantage is flexibility. If you fly United one month and Southwest the next, you earn the same rate of miles or points either way. You can also use the miles for non-flight rewards like hotel stays, car rentals, or gift cards. Some cards let you transfer points to airline partners at a fixed rate (usually 1 point equals 1 mile), so you're not locked into one airline's earning structure.

The trade-off is earning rate. A general rewards card might earn 2 points per dollar on travel purchases (flights, hotels, rental cars) and 1 point per dollar on everything else. An airline-branded card earns 3 to 5 miles per dollar on that airline's flights. Over time, if you fly the same airline consistently, the branded card will get you more miles. If you split your flying, the general rewards card catches up because you're earning at the same rate no matter which airline you choose.

General rewards cards usually have lower annual fees—often $0 to $250—and the perks are less airline-specific. You might get a credit toward travel purchases, lounge access, or travel insurance instead of a free checked bag with one airline.

Comparing what you'll actually earn in a year

The only way to know which card is best for you is to do the math with your own spending. Here's how:

1. Write down how much you spend per month on flights with your main airline (or airlines if you split your flying).
2. Write down how much you spend per month on everything else.
3. Multiply your airline spending by the miles-per-dollar rate for each card you're considering.
4. Multiply your other spending by the miles-per-dollar rate for each card.
5. Add the sign-up bonus miles.
6. Subtract the annual fee (in miles, using your airline's rough conversion of $0.01 per mile).

Example: You fly Delta four times a year (roughly $400 per flight, $1,600 per year) and spend $3,000 per month on other things. The Delta SkyMiles card earns 3 miles per dollar on Delta flights and 1 mile per dollar on everything else, with a $95 annual fee and a 50,000-mile sign-up bonus.

• Delta flights: $1,600 × 3 miles = 4,800 miles
• Other spending: $36,000 × 1 mile = 36,000 miles
• Sign-up bonus: 50,000 miles
• Total: 90,800 miles
• Minus annual fee (roughly 9,500 miles at $0.01 per mile): 81,300 miles

Now compare that to a general rewards card earning 2 points per dollar on travel and 1 point per dollar on everything else, with a $0 annual fee and a 40,000-point sign-up bonus. The general card would earn you roughly 76,000 points in the same year. The airline card wins, but only by 5,300 miles—not a huge difference. If you flew Delta only twice a year instead of four times, the general rewards card would actually come out ahead.

What to check before you open any airline card

Before you apply, look up your airline's award chart. This shows you how many miles a flight actually costs. Award prices vary wildly depending on the route, the time of year, and how far in advance you book. A domestic flight might cost 25,000 miles in off-season and 50,000 miles during peak travel. If you can't find a flight you actually want to take for a reasonable number of miles, the card isn't worth it.

Also check whether the airline charges fuel surcharges or taxes on award flights. Some international airlines add significant fees even when you're using miles. A flight that costs 60,000 miles might also cost $200 in taxes and surcharges, which you pay out of pocket. That reduces the real value of the miles.

Finally, look at the airline's devaluation history. Airlines occasionally reduce the number of miles you can earn per dollar or increase the cost of award flights. If an airline has devalued its miles twice in the past five years, the miles you earn today might be worth less in the future. This isn't a reason to avoid the card, but it's worth knowing.

When a general rewards card makes more sense than an airline card

Choose a general rewards card if any of these apply to you: you fly with multiple airlines, you don't fly enough to justify a high annual fee, you value flexibility over maximum miles, or you want to use points for things other than flights (like hotels or gift cards).

You also want a general rewards card if your main airline is a smaller carrier or a low-cost airline. Budget airlines like Southwest and Spirit don't have premium credit cards with high annual fees, so a general rewards card is often your only option to earn miles efficiently. Some general rewards cards specifically partner with these airlines, so you can transfer points to them at a good rate.

If you're new to earning miles and aren't sure which airline you'll fly most, a general rewards card is the safer choice. You can always switch to an airline-branded card later once you know your flying patterns.

Frequently Asked Questions

Do I have to use the card to earn the sign-up bonus?

Yes. The sign-up bonus requires you to spend a specific amount on the card within a set time frame (usually three to six months). You don't earn the bonus just by opening the card. If you don't meet the spending requirement, you get no bonus at all.

Can I use airline miles to buy anything other than flights?

It depends on the airline and the card. Most airlines let you use miles to book flights, seat upgrades, and sometimes hotel stays or car rentals through their website. Some airline cards also let you redeem miles for statement credits or gift cards, but the value is usually lower than booking a flight. General rewards cards offer more redemption options—you can often use points for hotels, rental cars, or cash back.

What happens to my miles if I close the card?

Your miles stay in your airline account. Closing the card doesn't erase the miles you've earned. However, some airlines have rules that say if you don't have any activity on your account for a certain period (usually 12 to 24 months), your miles expire. Using the miles or keeping the card open counts as activity.

Is it worth opening multiple airline cards?

Yes, if you fly with multiple airlines and can meet the spending requirements. Many people open one card, earn the sign-up bonus, then open another card a few months later. The key is spacing out your applications—opening too many cards in a short time can hurt your credit score. Most people wait three to six months between applications.

How do I know if a card's annual fee is worth it?

Calculate your expected miles for the year (using the math shown earlier) and subtract the annual fee. If you'll earn at least enough miles to cover the fee and then some, it's worth it. As a rough rule, if you fly at least four times a year with the same airline, an airline-branded card usually pays for itself. If you fly fewer than four times a year, a general rewards card is usually better.