MilesBuzz! - A website that shows how many seats available on any given flight?

Help a guy out.

Check out AOW

http://flyaow.com/classavailability.htm

Cheers,
Jeff

If you're flying Delta:

http://www.benedelman.org/travel/

How does one decipher from the codes which are available for upgrades either with paper certs or miles?

How does one decipher from the codes which are available for upgrades either with paper certs or miles?

A search on the airlines' respective board will likely pull up a thread discussing booking classes and thus, which buckets (or "codes") and available for upgrades.

aloha