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18 Things Everyone Should Know About Airline Miles

Learn how to get more boarding passes for your buck.

Alice Mongkongllite / BuzzFeed

1. Miles from each airline are redeemed differently, so get to know your preferred airline's system.

Do enough research to know what your miles are worth, and what the most efficient ways are to use them. Here's a basic overview:

American Airlines miles are especially good for travel to South America and Asia, because of their route network and partner airlines. They use a zone-based awards chart, meaning you'll need to use a set amount of miles for a ticket based on which areas of the world you're flying from and to.

Delta uses dynamic award pricing, meaning the number of miles you'll need can fluctuate based on demand, price of the ticket, day of the week, and other factors. You'll often get a good value on domestic flights and flights to western Europe and Australia.

United miles are useful for getting to most of Europe, and to far-flung destinations like South Africa and the South Pacific. They use a zone-based chart, but there is one caveat: they charge more for award flights on partner airlines, which are usually the ones flying to those far-flung destinations.

Southwest miles are fixed-value (1.67 cents per mile) and redeemed based directly on the price of the ticket. Southwest is a domestic airline, but they've recently been adding some flights to the Caribbean and a few other nearby international destinations. Aruba or Cancun, anyone?

Beyond the big American carriers, you can branch out to international airlines, which can be surprisingly useful for domestic travel. For example, British Airways has one of the best programs for short-distance flights in the US. As you start to learn more, the sweet spots of each program will begin to reveal themselves, and you can match your own travel goals to the program that's best for them.

UPDATE: Original image has been removed at the request of the copyright holder.

2. Miles are worth about two cents each (or should be).

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To maximize your value, always try to get at least two cents of value out of each mile when you redeem them in exchange for a plane ticket. Check out this blog post for a more detailed explanation of how to calculate mileage value.

You can actually redeem your miles from the airlines or banks that issue them for a value of one cent each, but it's not a good idea. You'll get a lot more value out of your miles by redeeming them for travel.

3. Credit cards are one of the best ways to earn miles.

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It's true. Co-branded airline credit cards offer huge sign-on miles bonuses which are often good for a free flight — or two! The best cards do have an annual fee, but, depending on how often you travel, you'll often find that the value of the flights you'll get to take can outweigh that fee.

Most of the credit cards also offer perks like trip insurance, baggage delay reimbursement, and free checked luggage. Keep in mind that you'll need a good credit score to get approved and qualify for even better bonuses with these cards.

4. "Miles" are from airlines and "points" are from banks — but they're usually interchangeable.

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Lots of people use both words to describe the same thing, but technically airline miles are only given out by airlines. Points are given out by banks. Points earned can usually transfer to airlines and become miles.

5. Some banks have their own credit card point rewards systems, which can transfer into multiple mileage programs.

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Chase's Ultimate Rewards points from Chase transfer to United, Southwest, British Airways, and several other airlines. American Express has Membership Rewards points you can use with 17 airline transfer partners, and Citibank has gotten in on the action with their Thank You program, which is new but starting to improve.

6. You can earn free miles for shopping online.

All the major airlines have online shopping programs or "portals", like Delta's Skymiles Shopping or JetBlue's ShopTrue, that let you earn miles when you visit retail websites through them.

To do this: Find the store you want to shop at in the portal directory and click through. Sometimes there's a special tag added to the URL, and other times not — you'll be tracked by the portals either way, and can earn a set number of miles per dollar spent, excluding tax and shipping.

Mileage payouts vary depending on the store, but average at around four miles per dollar — so you'd spend $100 and get 400 miles credited to your account. This page has a list of all the major shopping portals. Just sign up with your airline account, shop normally, and rake in the free miles.

7. And earn even more free miles for stuffing your face.

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Yep, airlines also have dining rewards programs where you can earn miles by linking your credits cards to a mileage account and using them to pay when you eat out. You'll get miles for every dollar you spend at restaurants and bars affiliated with your program, including tax and tip!

It's worth a quick check to see if any of your favorite bars or restaurants are already on the bonus miles list. (And if not, it's a great excuse to check out new places.)

8. You can even earn miles for taking online surveys.

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If you have some time to kill, you can earn miles by answering random surveys at sites like e-miles and e-rewards. It's usually only a few hundred miles, but it's an easy way to top off your balance when you're close to an award redemption goal, or to keep your account active.

9. Get on your airline's email list for chances to earn extra miles.

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Sometimes airlines run mileage promotions on certain routes, fare classes, dates, etc. Sign up even if you're already planning to fly somewhere, since you never know when it might apply to your flight. A lot of them are the usual spammy marketing stuff, but every once in a while, they send out a gem.

10. One of the smartest ways to use miles is with partner airlines.

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The big American airlines partner with lots of international airlines you might not know about, and therein lies some of the best ways to get to cool places with your miles.

For example, American partners with Fiji Airways and Air Tahiti Nui — just in case you want to go to Fiji or Tahiti. United partners with Singapore Airlines, which offers one of the best business classes in the world, plus tons of other world-class airlines.

Delta partners with Air France and Virgin Australia in case you'd like to visit Paris or Sydney, respectively. Other cool partnerships are American with Finnair, United with South African Airways, and Delta with Aerolineas Argentinas (which has flights to extreme southern South America).

11. You can actually credit miles from a flight to any frequent flyer program within that airline's alliance or partnership.

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For the longest time, I thought I had to credit Air Canada flights to Air Canada's frequent flyer program, United flights to the United Program, Aer Lingus flights to their program, etc. Wrong! I could have credited all those miles to one program, because all those airlines are part of the same alliance.

Crediting everything to one airline program builds up your miles balance in one place, where they can accumulate and be useful faster. Check out this list of airlines and their alliances (or non-alliance status) so you know which ones are partner's with the airline you want to credit to.

12. Keep earning miles so that the ones you have don't expire.

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Most programs have miles that expire within 18 months, on average. That's quite a while, but time can pass by faster than you think, so make sure to read the fine print.

By shopping through the portals, dining at a restaurant in your airline's dining program, or taking a quick survey online, you can reset the clock for your miles. Having an airline's co-branded credit card and using it here and there will also help. Taking a flight will do the trick, too, of course.

13. Miles may let you add stop-overs and see more places for free.

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The terms are sometimes more flexible with an award ticket and let you do some cool things that would be super expensive on a paid ticket.

Some programs will let you add in a stopover, which can be anywhere from a couple of days to a few months, before continuing on to another (final) destination. Others will let you fly into one airport and then fly home from another one — this is called an "open jaw" award. You may also be able to mix and match flights from multiple airlines within an alliance on one ticket.

14. Mileage programs are not savings accounts; miles are meant to be used.

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I subscribe to the "earn and burn" philosophy for my miles. You never know when airline programs might change the value of miles or require more miles for awards, sometimes without notice.

The best way is to approach miles is with a goal in mind, and once you reach that goal, redeem your miles for it! Don't hoard miles for a trip you'll take "someday."

15. Resist the urge to redeem miles for merchandise.

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If you ever see an offer to get a new toaster for "only" 30,000 miles, don't do it. It's never a good value. Ditto for using your miles for magazine subscriptions, goods and services, and even to partially offset the cost of regular paid tickets. Using miles for award flights — and being sure to get two cents of ticket value for each mile — is by far the best way to use your miles.

16. Never pay money for miles unless you have a specific goal in mind.

Delta Air Lines

You'll often see airlines advertising the ability to buy miles on their websites. It's usually not a good idea, unless you're thiiiiis close to qualifying for a specific awards flight somewhere and need to top off your account right away.

17. You'll earn more miles more quickly when you have elite status with an airline.

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Top-tier status with an airline typically begins when you've flown 25,000 miles (of literal distance) in a one-year period. That elite status comes with bonus miles earned for each mile flown, anywhere from 25% extra to 100% — double miles — and even more if you're flying business class. This alone is a great reason to stay loyal to one airline.

18. But be warned: Earning miles is an addictive hobby.

Once you start researching this stuff and realize how far your miles can take you, and how many different ways there are to earn them, you will be hooked. Just be prepared.

And remember: Miles can take you to places you never thought you'd visit.

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Patagonia in fall? Venice for Carnival? Sydney for New Year's fireworks? Anything's possible, so think big and start reading up ways to earn the airline miles that will get you there.

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