QUOTE(bearbear @ May 19 2016, 12:23 AM)
QR
SIN-DOH-ATH (transit at Doha so this is consider 1 transfer & 1 stopover?)
5696 Miles
Plan is to get to Santorini, then take a flight to Rome which I will visit a few cities by train and end up in Milan. Take a budget airline flight from Milan to London. Since my last stop was ATH & next departure from LHR, so considered 1 open-jaw?
Yes ATH/LHR would be considered 1 stopover and 1 open jaw. Don't forget the somewhat high APD in LHR when flying out on J/F.
QUOTE(bearbear @ May 19 2016, 12:23 AM)
AA
LHR-LAX (1 stopover; 1 open jaw?)
5456 Miles
Read some review and here that the BA A388 J suck? Seems AA's 77w is a better option?
Plan in US: LAX-LAS-SFO
CX
SFO-HKG (1 stopover)
HKG-SIN (1 stopover)
6927+1587 Miles
TOTAL 19,666 Miles (140k AM redemption)
Can i utilize LAX-LAS domestic flight into my plan? (236 Miles) This will bring the miles to just below 20k in total and total 5 stopovers. Then I just need to get another flight myself from LAS-SFO
Appreciate your comment especially seat availability issues
I personally would not do LAX-LAS with all the hassles of TSA. If you're up for it, do a road trip LAX-LAS-SFO. I've done it twice already and would do it again! You will need a car ideally in Los Angeles anyway, unless you're happy to pay for Uber everywhere which can get expensive. One way car rentals aren't all that expensive.
Also how are you doing the mileage calculations? gcmap, webflyer and expertflyer all will give slightly different amounts, the only number that's valid is CX of course

but at 19,666 miles you're far too close to the 20k limit and might not be able to squeeze that domestic flight in.
Good luck and have fun!