25 years ago (!) I came back from JFK to LHR on Pan American (RIP) PA007. IIRC this was a daily round the world service (747 Classic) that routed something like JFK-LHR-BOM-HKG-SYD-HNL-LAX-JFK. I think there was a similar flight (PA008?) westbound too.
Anyone remember this and know how long it took? Or am I having a 'senior moment'