I can answer you in the other direction (don’t have ABC Part 2 to hand).
For the first three months of 1969 there were 22 weekly direct services BKK-LON, none of which were end to end terminators.
Pan Am (PA1) operated daily, originating in LAX and terminating in NYC. All stopped at BEY-IST-FRA but followed different routings to BEY, variously DEL/THR, CCU/KHI, RGN/CCU/KHI and DEL/KHI.
Air-India operated 4 weekly, originating TYO and terminating NYC. Intermediate stops were DEL/BOM/CAI/FRA/PAR, CCU/BOM/BEY/PRG/PAR, CCU/BOM/BEY/ROM/ZRH and DEL/BOM/BAH/BEY/GVA/PAR.
You still with me?
JAL flew twice a week originating TYO, via DEL/THR/BEY/ROM/PAR
Qantas flew four times a week, originating SYD, via BAH/CAI, CCU/BAH/IST/AMS, BAH/CAI/ROM and BAH/ROM/FRA.
BOAC flew 5 weekly, one SYD originator via DEL/THR/TLV, one TYO originator via BOM/KHI/ROM and the others HKG originators via DEL/THR/ZRH, BOM/KHI/ROM and DEL/THR/TLV.
All were 707s except the JAL DC8s
Fastest was the QF 2-stop at 19h25, slowest were the Air-Indias at 24h45
Well you did ask