Random trivia:
Stumbled upon an old Qantas timetable from 1963.
A trip from Sydney to London on the "Kangaroo" route would've taken you on a Qantas Boeing 707 jet, with sample routings:
- Sydney - Jakarta - Singapore - Bangkok - New Delhi - Tehran - Istanbul - Rome - London; or
- Sydney - Brisbane - Singapore - Bangkok - Kolkota (Calcutta) - Karachi - Cairo - Athens - Rome - London
Journeys from end-to-end would take "virtually" 23-24 hours, e.g. the first routing leaves Sydney at 1200h on Tuesday and arrives in London at 1050h on Wednesday; the second routing leaves Sydney at 1200h Thursday and arrives in London 1225h Friday. As a comparison, QF1 takes "virtually" 14 hours in non-DST: depart Sydney 1610h and arrive London 0635h.
The cost of the round trip from Sydney to London via Singapore in F (two-class plane: F and Y only) cost, at the time, 926 pounds and 5 shillings. I don't know how to convert that to today's currency, but I'd imagine that's quite a lot...
P.S. no flat bed seats in 1963......