[David N]

Hi

At over 16000km I don't think anyone else will be able to top this?
Qantas to Dallas will drop to second place up until the planned Perth - London flights are put in place

Sydney (SYD) – Dallas (DFW)
Qantas Airways
13810 km 15hrs 35mins

Hong Kong (HKG) – New York (JFK)
Cathay Pacific
12980 km 15hrs 50mins


Source:
The World’s Longest Direct Flights from Asia Pacific and Europe - See more at: http://www.aviationfigure.com/the-worlds-longest-direct-flights-from-asia-pacific-and-europe/#sthash.VQwiiU6Q.vP2sj9Yy.dpuf