<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by DP-UK:
Not heard of these miles - what are they ? I was planning on getting either AA or BA miles unless there's something better.
Trying to get two segments would be the sort of thing I'd try too 
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"Great Circle" miles are the technical term for the mileage between points on the earths surface. This is the mileage used by airlines to award "Air" Miles. There is a handy tool for calculating the great circle distance here -
http://gc.kls2.com/ - In the
Path box put in the two airports you wish to calculate the distances between e.g. SYD-LAX.
It is possible to ticket QF107 as SYD-(LAX)-JFK. You would need to book SYD-LAX for one date and then LAX-JFK for another. After booking and ticketing call and have the LAX-JFK leg moved to the same day as SYD-LAX. IMHO it is better to ticket as one leg (SYD-JFK) and then use your transcon to get back to LAX.
I am doing-:
SYD-(LAX)-JFK
JFK-SJU
SJU-SLU
SLU-SJU
SJU-JFK
JFK-LAX
LAX-LHR
Believe it or not I'm doing SLU-SJU-JFK-LAX-LHR all on the same day. I must be mad!