Anyone know of a comprehensive list (or at least a list with the top 500 or so) of IATA 3 letter codes? I'd like to find one that I can print and keep at my desk for quick reference. Can't find anything online like this.

Thanks!

Lots of databases out there but I don't know of one that is organized by traffic beyond the top 30 or so. Wikipedia has some lists of top 50 or 100 by continent or region and you can sort those by code.
http://en.wikipedia.org/wiki/Busiest...nger_boardings
http://en.wikipedia.org/wiki/List_of...orts_in_Europe

http://en.wikipedia.org/wiki/List_of_airports
http://www.iata.org/ps/publications/Pages/ccd.aspx
http://www.avcodes.co.uk/aptcodesearch.asp
http://www.nationsonline.org/oneworld/airport_code.htm

Did you even try?

http://www.lmgtfy.com/?q=list+of+iata+codes

Yes - those lists are all in alphabetical order and cannot be viewed on a single page. More interested in something that can be viewed and printed in one shot, rather than 26. Surprised to find (after 30 minutes or so of searching) that there does not exist a downloadable spreadsheet that can be easily found.

Thanks for the tutorial on this "Google" though, I'll really have to check that out. Must be some new technology on these internetz.

http://www.world-airport-codes.com/ has almost all global codes, excluding some private fields and military airports.

The IATA website has a comprehensive airline code list but not airports. The question of "top 500 or so" depends on the measure. There are such lists on a number of metrics but usually are in different places. Ones I know of are:
1) physical size,
2) number of runways,
3) length of runways,
4) number of flight operations,
5) number of airline flights,
6) number of passengers handled,
7) number of destinations served,
8) number of scheduled flights,
9) number of international flights,
10) number of connecting passengers.

Depending on what of these metrics you choose you may find the #1 airport to be:
Beijing, Atlanta, Heathrow, Van Nuys and so on.

So, once you know the question you're asking there will be a list somewhere, using some search engine or another.