Originally Posted by
Capn Bloggs
ULH would probably be cheaper: no single crew could do two 9 hour sectors, so would have to overnight a full crew prior (and after). Also, the ULH operation may only use 1 captain and 3 others, whereas if you did two sectors, you'd need two captains.
I'm guessing this is really dependent on the regulation of the crew. I think some crews are allowed up to 9 hours with a two person flight crew and crew on an overnight gets paid a lot less than the crew on an aircraft. Another issue is the legal rest times between flights.