Originally Posted by JoeDTW

3. (1969) Once upon a time, as recently as 1969 in fact, there were no nonstop or direct flights between the major metropolises of Mexico City and Tokyo.Thankfully, you've found a convenient connection utilizing two nonstop flights, both aboard the same airline with both flights operating the same aircraft type.Please identify the airline, the connection airport and the aircraft type.

Canadian Pacific, DC-8-63 via YVR

CORRECT! Per the schedule I referenced for this question, all of CP's DC-8 flights were listed simply as "DC-8". That said, CP took delivery of its first DC-8-63 IN 1968, so it very likely could have been used on all or part of this itinerary - To wit:

Canadian Pacific CP 421 Mexico City (MEX) 825a – 1255p Vancouver (YVR) DC-8 Tu Su
Canadian Pacific CP 401 Vancouver (YVR) 300p – 445p Tokyo (TYO) DC-8 We Fr Su