Originally Posted by airbus320
The window opens for Elites at four calendar days prior to departure.
The four day period begins at 0000hrs Eastern time where the AC computer resides.
FYI, if you are travelling (originating in a time zone ahead of EST. eg LHR), you may be able to get away by calling 0001 LOCAL time (-4days obviously) - I called Canada direct as LHR offices was closed and it was 7pm EST and just indicated to the CSR that it was 0001 -4days where the ORIGINATING flight was - she said that it was OK and gave me the upgrade - it was a packed flight out back so my wife and I were lucky.