Originally Posted by JIMCHI
The cost is $50 per 5,000 miles plus a $30 per transaction fee. No limit on the number of miles.
Guess it would depend "how" you're going to use the miles before deciding to reactivate them. It would cost $280 to reactivate 25,000 miles. For that same $280, I could buy a transcon ticket on a decent sale and accumulate the miles on it. Buying the miles back may not be worthwhile for everyone.