Not sure mid haul, long haul, short haul makes a great deal of difference. I would hazard a guess that airlines themselves (not for marketing purposes) consider a short haul route as one whereby the outbound crew can turn around and crew the return flight, such as Paris, Vienna, Cairo etc. the limit on this is I suspect around the six hour mark, still making a crew day of around 14 hours….the limit I believe. Anything longer and it is long haul as the outgoing crew cannot fly the thing straight back, it requires another crew at the station ready and rested to fly back.
That brings me to a question, a bit off topic, please forgive me, …did Concorde Crews do the full round trip to JFK and back to LHR, or did they have a rest stop?
Whenever I have flown to Cayman it has always been on a 777.