If you have 7 figures of miles...use them sooner rather than later. They are not an asset that increases in value over time. You can find some good redemption rates now and then, but as it has been mentioned, redemption rates are usually fairly closely tied to the cash price of the ticket now. I am seeing a lot of flights now where the redemption rates are $0.01/mile and rarely $0.02 per mile. Not too many years ago, I was able to redeem miles for several cents per mile. If you have 1,000,000 miles, its probably worth $15,000. 2-3 years ago it was probably worth $25,000. 2-3 years from now it will be worth $10,000 as DL moves in the direction of having 1 mile equal 1 penny.