kebosabi, perhaps, but there really isn;t that much traffic to Kazan or Ekaterinberg is there? If you want to play it that way, then let's include Alaska and for good measure the distance to Hawaii? As I stated above, LHR-IST or LHR-SVO(DME) is pretty much the furthest you get in flights and they are significantly shorter than JFK-LAX (and SFO) for example, and NYC to all LA area airports has exponentially more traffic than all London airports to all Moscow airports and all London airports to all Istanbul airports.