“How do I know if my United ticket is non-refundable?
If you're unsure, call +1-[866]=[673]~[1675]/ or +1-[833]=[844]~[1201]/ (USA) to confirm your fare class and refund eligibility. The representative will check your ticket details and let you know if you qualify for a refund or eCredit. Basic Economy tickets are generally non-refundable unless United cancels the flight.”