https://community.pros.com/conversations/general-discussion/what-is-fully-refundable-on-united-ticketrefundsnavigator/66f6608eba792406faba5b64

Fully refundable tickets on United Airlines allow you to cancel your flight and get a complete refund at any time call: +-+--+𝟏-888-(829)-1467 (USA) or +--+𝟏-888-(829)-1467 (𝓤𝓚)