What does nonrefundable mean on Expedia?

𝙀𝙭𝙥𝙚𝙙𝙞𝙖 ' cancellation policy is customer-friendly １－８５５－９２６－０９５０ Tickets are fully refundable within hour of booking, provided the departure is more than two days ahead. For more details, call １－８５５－９２６－０９５０. Nonrefundable tickets can be changed or