By Upgrd Podcast - Upgrd Podcast In this week's frequent flyer podcast, we are joined by Nicholas Kralev to discuss his new book Decoding Air Travel. We discuss how you can construct your own airfare by looking at the airline tariffs and inventory buckets and why you should be loyal to one airline alliance to maximize your benefits. In addition we cover some current promotions: 40% discount on Lufthansa business class upgrades US Airways 100% bonus on purchased miles is back Do you have any tips for finding the lowest airfare? Let us know in the comments below.