i'm looking to book 4 tickets on delta/virgin australia flight to sydney australia in december. delta is 45k miles one way and it looks like its the lowest number of miles during peak season. if i transfer amex membership reward points i have to pay the transfer fee of $99 (since I'm transferring 180k miles and its more than $99). i can't find the same tickets on air france or korean air. does anyone else have a better idea to save miles or fee? tia!