Back in 2005, a Boeing 777-200LR set a World Record for longest commercial flight of nearly 23hours. It went from Hong Kong International to London Heathrow. It did not go the short way around at around 11,664 nautical miles. The flight left on the evening of November 9th flying east bound over NA and then on to London. Got to London on 11 November, but that is all I know.
I have been seeing if that flight is still on Flight Aware, not sure it would be as it did not start/stop in the US. I would love to see the route taken so even if it isn’t on FlightAware, if someone knows the route or a link I would appreciate it!