A refundable ticket allows you to change or cancel your flight without paying additional fees. Although non-refundable tickets are often less expensive, altering your reservation will incur a cost and require you to pay any fare differences. However, Basic Economy tickets do not allow for modifications. https://my.onetrust.com/s/question/0D5RO00000OEZzi0AH/call18668843315does-the-united-economy-allow-cancellations