You can cancel United Airlines flights and get a refund depending on the ticket type and timing. United allows free cancellation within 24 hours of booking if the flight is at least seven days away. This applies to all tickets bought directly from United. After 24 hours, refundable tickets can be canceled for a full refund with no fees. Non-refundable tickets usually do not get a cash refund but may get travel credit minus cancellation fees, which can be around \$200 for domestic and up to \$400 for international flights. Basic Economy tickets cannot be canceled or refunded after 24 hours. If United cancels your flight or there is a long delay, you can get a full refund regardless of ticket type. To cancel, use the United website, app, or call customer service. Refunds to credit cards typically take up to 7 business days, but may take longer to appear on statements. Other payment methods may take up to 20 business days. Always check your ticket rules and cancel as early as possible to maximize your refund options.