Some of you may remember this, but I recreated the 777 flight from Hong Hong to London:
On November 10, 2005, the first −200LR set a record for the longest non-stop flight of a passenger airliner by flying 11,664 nautical miles (21,602 km)[7] eastward from Hong Kong to London.
Based on information I found on the flight, I set up four flights in FS:
Hong Kong to Midway Island
Midway Island to Los Angeles
Los Angeles to New York
New York to London
Getting within about 2nm from the end of each flight, I would call up the next one and the 777 would vector to the new course.
My flight was about 24 hours long as I had to reduce the speed to .80 Mach to keep from running out of gas. Landed with plenty of it though.
Saw the sun rise twice