Moderator Communications Coordinator, Signatures
Join Date: Apr 2001
Location: deep within the Eskimo lair
Programs: TubWorld, Bar Alliance, Borratxo Legendarium
Posts: 16,970
You aren't redeeming mileage for MIA-TPA, you're redeeming mileage for SEA-TPA.
If AS needs to use its own planes (and has award availability) to get you part of the way there, it will.
Are you trying to get a stopover in Miami?