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Old 26th Aug 2017, 17:48
  #54 (permalink)  
Join Date: Jan 2008
Location: Reading, UK
Posts: 11,861
Originally Posted by pax britanica View Post
Does a direct LHR to XXX flight from LHR cause more or less pollution than the same trip via YYY and another few hours flying plus a second JetA 1 guzzling take off and climb?
It depends on the distance.

Landing at, say, Leeds on the way from LHR to Edinburgh is clearly going to burn more fuel than flying direct.

But flying non-stop from UK to Australia, as QF will do next year, burns more fuel than stopping enroute because of the need to depart heavy and tanker many tonnes of fuel over several thousand miles, instead of picking half of it up en route. Even allowing for the extra takeoff and landing, you still burn less if you stop halfway and fly lighter.
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