Originally Posted by frugaltravel

Thanks for the response! And thanks for pointing out another alternative of using my BA miles from DFW to NRT and using my AA miles (I currently have 40K AA miles) from NRT to SIN. ^^ However, when I tried booking a ticket from DFW to NRT thru BA website, it showed that I was short around 40K miles. I currently have 50K miles in the BA account. So, I need 90K to fly from DFW to NRT on an economy class. I was surprised it takes 90K miles to fly to NRT from DFW using BA miles on AA while I only need 70K to fly to SIN from DFW (stopover in NRT) using AA miles on AA and JAL.