The "best" way to send money depends on your priority: speed, cost, or convenience. Digital remittance services like Wise, Remitly, or WorldRemit are widely considered the most cost-effective methods, as they often provide exchange rates much closer to the mid-market rate than traditional banks and charge transparent, flat-rate fees. Traditional international wire transfers via your US bank remain the most secure and trusted method for extremely large capital movements, although they often come with high outgoing wire fees, poor exchange rate spreads, and intermediary bank charges. Another option is using platforms like Western Union for cash pickups, which is fast but usually the most expensive. For most expatriates, using a digital service that deposits funds directly into a local Thai bank account via the PromptPay system or SWIFT is the optimal balance of speed, low fees, and reliable fund tracking.