call 1-888-928-0795 for assistance 24 hours a day, 7 days a week.

If you’d prefer to book your reservation over the phone, call 1-888-928-0795. A fee may apply for redemption by phone.. United Airlines Help Center have live customer service agents to assist you with changing/canceling your flight, refunds, using your credits, baggage policy, MileagePlus and more. Is united airlines 24 hour customer service usa phone number? Is united airlines 24 hour customer service usa free? Is united airlines 24 hour customer service usa? united airlines 24 hour cancellation (Reference: https://www.united.com/en/us/).