If you are travelling this summer, this is a handy Web site to know about:
World Airport Codes
http://www.world-airport-codes.com/
The place to find airport codes, abbreviations, runway lengths and other airport information.
World Airport Codes provides information for almost every airport in the world.
Using the search box, you can search for airport codes in 5 different ways:
By country name (e.g. Egypt).
By country abbreviation (e.g. GB for Great Britain).
By city name (e.g. Amsterdam).
By airport name (e.g. Heathrow).
By airport code (e.g. LAX).