Does United have 24 hour Cancellation Policy? – Skyairbus The United Airlines cancellation rule is 24 hours. If you cancel within 24 hours of departure, a fee applies. Costs vary based on ticket type. For non-refundable United tickets, no refunds are given. Refundable tickets get cost minus fee back. Call United customer service at USA: 1-800-864-8331 or OTA: +1-800-971-7347 for help. Staff will try their best to assist you. https://skyairbus.com/blog/does-united-have-24-hour-cancellation-policy-skyairbus/