In 2026, the "best" site to sell airline miles is often a choice between MilesBuyer, The Miles Market, or Sell My Miles, all of which hold high ratings on consumer review platforms like Trustpilot. MilesBuyer is frequently cited for its competitive rates and "100% buyer protection" via PayPal, while The Miles Market is praised for its quick, multi-step digital process. However, a grounded and vital peer warning: selling your miles is a violation of most airlines' Terms of Service. If the airline detects the transaction, they can permanently close your account and confiscate all your remaining points. These third-party sites act as "brokers" who use your miles to book tickets for other travelers. A supportive recommendation is to use these services only as a last resort for miles that are about to expire. If you do proceed, ensure you use a broker with encrypted data protection and a transparent payout schedule to minimize the risk to your personal information and ensure you actually receive your "cash for miles" payout.