Originally Posted by
ISTFlyer
For reference;
FRA-ATL is a freight-only route that is running since fall 2020.
Flight number of 27xx or 28xx are a strong indication
For a list each month see
unitedcargo.com then Widebody Schedule, such as
July 2021
Code:
FRA ATL UA 2800 11:35 15:25 787 4 Effective only on July 1
ATL FRA UA 2803 18:55 9:35 787 4 Effective only on July 1