Originally Posted by
mAAine_flyer
Check
this thread - see post #20 for practical details of how it works.
As pointed out, you haven't got a hope in heck of making your 47 min connection in BOS. Intl > dom MCT at Logan is something like 1h30m. The walk from E to A is well-signed and isn't all that long (usually quicker than the free bus), but by the time you deplane, clear immigration and then customs (even without checked bags), you'll be out of time. Is there a later DL flight to CVG you can get?
it did say "except for a free ticket" - is a miles ticket a "free" ticket, ie non rev or are miles considered currency???