southern england to a base in Libya on one tankful.
You would probably need an average tailwind of about 150kt to manage that. We used to do West Raynham - Luqa - El Adem, and with 2 x 230 gal and 2 x 100 tanks on the FGA9, there would not be much left on arrival at Luqa with typical winds. That would be about 2hr 40 min, with another 1hr 30 or so for the second leg.
My longest was Gib - West Raynham, same tank fit, 3hr 00 min. We landed with just about enough for a Marham diversion. The plan had been Gib - St Mawgan; the TAF was OK, 3nm & 1000ft or so, but it went out in sea fog...……………. so we stayed high & stumbled on across England at FL480.
Happy days!