United has just offered to waive ANY change fees for ANY flight booked between Mar 3 and Mar 31. Or, the price of the ticket can be applied to a new flight booked within 12 months of original booking. They must really want new bookings! Here are the full details from an email I just received:
Tickets: For tickets issued March 3 through March 31, 2020, customers will be permitted to change free of charge to a flight of equal or lesser value up to 12 months from the original ticket issue date. If the new flight is priced higher, the customer may change for no fee but must pay the fare difference. If the customer decides to cancel their flight, they can retain the value of the ticket to be applied to a new ticket without fee for travel up to 12 months from the original ticket issue date.
Cancellations: If the customer decides to cancel the flight they booked between March 3 and March 31, 2020, they can retain the value of the ticket to be applied to a new ticket without fee for travel up to 12 months from the original ticket issue date.
Fare Validity: This applies to all tickets, all fare types, all destinations, all points-of-sale, all travel dates available for sale, provided ticket number starts with 016.
Minimum Stay: No minimum stay.
Blackout Dates: No blackout dates.
Miscellaneous: Fares, fees, rules and offers are subject to change without notice. Fares are nonrefundable except during the first 24 hours after purchase. Other restrictions may apply.