The Equator is 40,120km long... So, the longest route must be no more than 20,060km (you could reach either two points linked by moving no more than this distance).

Given this, I guess AKL-LAX-LHR (NZ) is the longest pax service route with 19.268km. Then, it would be NRT-LAX-GRU (JL, RG) with 18.715km

Can you guys think in longer routes regardless they have stops... I am interested in knowing which airline has the longest route.

Thanks

Just for your info:

The Equator is 40,120km long... So, the longest route must be no more than 20,060km (you could reach either two points linked by moving no more than this distance).