Originally Posted by
Mackieman
Correct, a B fare requires 15,000 miles to upgrade to BusinessFirst if space is available. You will also need the amount up front to get on the waitlist as the mileage is deducted when you request the waitlisting, but would be refunded if the upgrade does not go through.
Actually Y class required 15,000 miles each way, B class is 30,000 miles each way