To contact United Airlines about a refund, there are several effective ways to reach their customer service team and ensure your request is handled efficiently. You can call United’s dedicated refund phone number at 1-800-864-8331 and select the option related to refunds to speak with a representative who can guide you through the process. Additionally, United offers an online refund request system through their official website, where you can enter your ticket details and submit a refund claim directly. Refunds typically take between 7 to 20 business days to process depending on the original payment method. While United does not widely publicize an email specifically for refunds, you can contact their general customer care email and include all relevant booking information to speed up your request. For more urgent matters, reaching out via United’s social media channels like Twitter or Facebook may also get a quicker response. If you prefer formal communication, you can send a written refund request by mail to their headquarters in Chicago. Before contacting United, make sure to have your reservation code, ticket number, and any supporting documents ready, as this will help ensure a smooth and timely refund process.