Originally Posted by
griffinj
Most programs, the cost to purchase miles is around .02 or .03 cents per mile. You could use that as your base cost. On Delta, a domestic RT ticket on the cheap (SkySaver) is 25,000 miles or a cost of $500-750. Europe on the cheap would be 90,000 miles for a Delta SkySaver, $1800-2,700.
90,000 miles is the DL redemption rate for business class. (50K for coach)