I was wondering if it would be possible to squeeze "Longest Route" on My Aircraft, financial listing, next to #of Routes. The least important column there is Daily Profit. Or, on Technical view, next to range of the aircraft.
This would come in handy with fleets with different variants, and different MTOWs, as in where a longer range aircraft is most needed.
Also, another place where the Longest Route would be useful on single aircraft My Aircraft page