, but it is rarely a cost-effective strategy unless you have a specific, high-value redemption in mind. Airlines sell miles as a way for travelers to "top up" their accounts for nearly-free flights or upgrades. Where to Buy Miles
How to Buy, Gift, Transfer or Donate Miles | Delta Air Lines can you buy frequent flyer miles
Most major airlines allow you to purchase miles directly through their website under a "Buy, Gift, or Transfer" tab. , but it is rarely a cost-effective strategy