Trump shouldnt bother pardoning Flynn. He wont accept a pardon because he didnt commit a crime, nor should he. No, Flynn will eventually be free, and the government (my hard earned tax money) will be used to compensate him.
All this delay is political, just to prevent the story from breaking before the election. The Judges are dirty, because they have accepted partisan accusers, with zero evidence of what they claim, over Flynn right to face his accusers. The judges are complicit with the governments crimes against Flynn.
POTUS will Pardon Flynn and many others, (not convicted Drug Dealers who used Firearms in the commission of their Crimes like Obama did), right after the November Election, Win or Lose.