I had a question, and I would like to know if you could help me.

....back in October 1977, Pan Am flight 50 flew from SFO to LWT to CPT to AUCKLAND and back to SFO

They did it in 54 hours and 7 minutes.

If that flight on the same route, over both Poles, was to take place today, on a commercial airliner, which aircraft would be the most efficient to do it, and, could it make in less time?

Thank you very much

Jose