Originally Posted by
shipcamein
3. How accurate is GCMapper? How can I double check my plan, if I'm within, say, 100 miles of the cut-off?
Use
https://www.asiamiles.com/en/earn-mi...alculator.html for non CX/KA flights. For CX/KA flights, you will either have to find another airline that code-shares on that route to compute, or refer to the Discovery or Silk Road magazine if you have a copy.