: If your miles are about to expire, buying the minimum amount (usually 1,000–2,000 miles) can keep your entire balance active. Critical Cautions
Buying airline miles generally costs between . Because most airlines value these same miles at only 1.2 to 1.5 cents each when redeemed for standard flights, buying them outright is typically a poor financial decision. Estimated Costs by Airline (Per 50,000 Miles) how much does it cost to buy air miles
: Many airlines add a 7.5% federal excise tax on top of the mileage price. : If your miles are about to expire,
: Avoid "mileage brokers." Buying miles from anyone other than the airline directly violates terms of service and can result in your account being permanently closed. A Guide to Buying Airline Miles: When to Buy, When to Skip Estimated Costs by Airline (Per 50,000 Miles) :
: Airlines can change the "price" of award seats at any time without notice, making your purchased miles less valuable overnight.