Its about as cost effective on spending 25K points to fly from PDX-SEA when BOS-ANC can be purchased for the same. Why not just pay for the rental? If you want to throw miles away you can always give them to me
I don't specifically know exactly at what value AS miles turn into rentals, but I would not expect it to be signficantly better than how UA does it. And the other day, I just priced a 10-day rental at LAX that woud have cost about $300, and it came to 45k-ish UA miles. I've used used 25k UA miles before for a flight that would have cost $500+ on UA all-mainline and still $400+ on AS/QX (with much of it on QX), so 45k for $300ish does not seem like a good value to me at all.
However: It is still a better value than redeeming for gift cards.
And they came up with the 45k-ish by taking 4k-ish per day and multiplying it by the number of days. Since a car rental costs less per day in moeny the longer it is, it could be that miles for car rental might be a bit less ridiculous if you need a very short rental only. But I still suggest you do the above kind of math to see if it's really a good use of miles for you.
At AA, the trick to using AA miles for car rentals is to use AAVacations (and essentially book a rental-only vacation, and then pay for your vacation with miles).
Btw, one important thing to note: With both UA and AA, there's big penalties for cancelling you car reseravation, if you even can. So you shouldn't be comparing this to a car rental reservation made direct with the rental company which allows you to not show up and still not be charged, you should comparing it to making a car rental reservation with some discount broker that gets you a cheapo "use it or lose it" prepaid car rental!
Last edited by sdsearch; Oct 11, 09 at 10:38 am.
Reason: corrected Horizon code