Originally Posted by ozstamps
United is UA.
American is AA
DL is Delta,
Northwest is NW
CO is Continental
BA is British Airways.
KL is KLM
AF is Air France
All fairly logical really.
That covers 90% of posts on FT
And for more obscure or less used ones try:
http://www.airlinecodes.co.uk/airlcodesearch.asp
You slighted WN, DH (deceased), LH (important *Alliance), HP, and many other not so obscure carriers. A tabulation of carriers does seem like a good aide to add.