In 10+ years of MS flight simming, the longest flight I have ever made, a few months ago, was a trip in my Beech Baron 58 from Santa Monica to Chicago, across the U.S.A, following the famous Route 66; but that involved filing Flight Plans, talking to ATC, stopping off at various Airfields en route, saving the flight, then continuing the flight next day, day by day...

...!
A continuous, long haul flight, in a high altitude, Commercial Passenger Jet, running on Auto-Pilot, never did appeal to me!...

...I would find it
unbelievably boring!
All my daily flights are short, day-time, clear weather, hops from Airfield to Airfield, at low altitude, in light, single/twin engined General Aviation Piston/Turbo-Prop Aircraft...

...!
I like admiring the scenery, around, and below me!...

...!
Paul...G-BPLF...FS 2004...FS Navigator..and a baby Cessna 150... 8-)...!