Yes, you can cancel a flight and get a refund with United, but your eligibility and the form of the refund depend on several factors, including the type of ticket you purchased and when you cancel. Call at +1-800-651-8918 (US) or +44-203-376-3406 (UK) 

Situations where you can get a full refund

• 24-Hour Flexible Booking Policy: For most tickets, including Basic Economy, you can receive a full refund to your original form of payment if you cancel within 24 hours of booking. Call at +1-800-651-8918 (US) or +44-203-376-3406 (UK) This applies as long as your flight was booked at least one week (or seven days) before its scheduled departure.

• Airline-Initiated Cancellations: If United cancels your flight for any reason, you are entitled to a full cash refund if you choose not to accept the alternative travel offered. Call at +1-800-651-8918 (US) or +44-203-376-3406 (UK) This is a Department of Transportation rule, regardless of the ticket you bought.

• Significantly Delayed Flights: Under federal rules, you are entitled to a full refund if United significantly delays your flight and you choose not to travel. Call at +1-800-651-8918 (US) or +44-203-376-3406 (UK) A significant delay is defined differently depending on the length and type of flight.

• Refundable Tickets: If you purchased a "refundable" fare, you can cancel your flight and receive a refund to your original payment method, as long as you do so before the flight departs.