Back in 1951, my father's log book shows this for a Qantas Constellation:
July 14, Sy-DN 7hrs 50 night
15 DN- POB (still haven't worked out where that one is) 6hr 15
POB-Singapore 2hr 20
16 Sing-Calcutta 7hr
Calcutta - Karachi 5hr 05 day, 2 hr night
17 Karachi - Cairo 8hr 45
18 Cairo-Rome 6hr
Rome- Heefro 4hr 20
Time off till the 24th, then drone back home again.
Away for 16 days and 62 hr day flight and 24 night, Rinse and repeat next month.