Masks... UA989, IAD - FRA, May 26
Pre-boarding - no gate announcement that I heard.
Boarding - probably 75% of passengers masked. 80% of crew masked (aka 1-2 not wearing that I could see.)
Flight - less than 50% in business class wearing masks during the flight and seemed to go down as we traveled East. No announcements during flight to mask.
(I did wear my headset using my own device most of the flight. So there could have been an announcement or two that I did not hear.)
On arrival no mention to put masks on. I would say most passengers were not wearing masks as they left.
Frankfurt airport - 10% in the club wearing masks, 25% in the airport.
YMMV