Old Jan 20, 20, 11:12 pm
  #15  
lokijuh
 
Join Date: May 2003
Location: Singapore
Programs: QF LTG, SQ EGTP, MH Silver, SPG Gold
Posts: 4,292
Originally Posted by gnomey View Post
And then we have the case where SUB-SIN-SYD-LAX is allowed, where there is backtracking with SYD-LAX being clearly UA
Actually, this one being permitted is indeed consistent with prior understanding, the rest might not be. The routing is only 40% more than the SUB-LAX great circle distance. There is a magic number that pushes an itinerary into backtracking, no one knows what that is, but 50% is often mooted figure for star alliance awards (i.e. >150% of great circle distance between the two ports).
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