I happened to see MAN-EMA or vv this year, it was noticeable as one of the only aircraft in the sky.
Southend have flown to the odd game in the past and some of the bigger teams have flown in - think I recall Blackpool doing so. In League 2 this will become even more limited.
Bolton flew into SEN more recently for Charlton or Millwall. There have also been a couple of inbound charters heading for Colchester United.