The cheapest way to send money from South Korea to the Philippines often depends on the transfer amount and service you choose. Options like online platforms such as Wise (formerly TransferWise) or Remitly can offer competitive rates and lower fees compared to traditional banks. Additionally, services like GCash and PayMaya allow for cost-effective transfers if you're sending money directly to these e-wallets. Always compare fees and exchange rates before making a decision, and consider checking with a financial advisor or the specific service provider for the best current options.