Originally Posted by JS
For 2003, Delta set aside a liability of $229 million for 10.4 million award tickets. Assuming all of those are the 25,000 mile version, that's $22, or 0.09 cents per SkyMile.
Thanks for the effort, JS. It would be interesting to know the average # of miles redeemed per R/T award ticket, per DL's definition. (Blending in int'l trips, Biz/FC awards, SkyChoice, etc.) I'm guessing it's not just a little but substantially more than 25k.
All in all, not a bad biz model, though. Give away something that costs you very little (especially when carefully managed thru
restrictions 
) but has a much higher perceived value to the customer.
Maybe these airlines are not such a bad investment here at the bottom....