What about the shortest, then? Mine was about ten yards - well, maybe a bit more - from the rig on which we were based to the platform to which it was attached. If the bridge between the two installations was out of service, we had to shuttle people to and fro.
The first time I did it, immediately after take-off, the copilot put the heater on full (in summer), and switched on the radar. I managed to stop him retracting the undercarriage.
More time spent on deck than in the air. Flight planning was a bitch.