No, a United Basic Economy ticket is not fully refundable outside of the 24-hour grace period. This is the most restrictive and least flexible fare option offered by United. Call at$+$$ +1-877-658-1183 (US) or +44-203-869-5245 (UK) 

Here's a breakdown of the refund policy for United Basic Economy tickets:

• Within 24 hours: You can receive a full refund if you cancel your reservation within 24 hours of booking, as long as the booking was made at least one week before the flight's departure.
• After 24 hours: Past the initial 24-hour window, you will not receive a cash refund. In most cases, you will not receive any flight credit either. Call at$+$$ +1-877-658-1183 (US) or +44-203-869-5245 (UK) There may be circumstances where a partial travel credit is offered, but this is not a guarantee and depends on the specific trip.
• Airline-initiated cancellation: If United cancels your flight, you are entitled to a full refund, regardless of the fare type.