FlyerTalk Forums - View Single Post - LHR-SFO two flights with close departure time
Old Jan 21, 2018 | 6:49 pm
  #14  
SFHokie
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Join Date: Sep 2012
Location: SEA
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FWIW there's also two relatively close daily flights SFO-PVG (857 departs around 1:20-1:40pm; 891 departs around 2:30-2:50pm) while on the return leg they are about 12 hours apart (890 departs 12:15-12:45am; 858 departs 1:15-1:45pm).

My guess is that is has to do with connection times and airplane utilization/servicing needs. But that's just a guess.
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