YEG is the IATA airport code for Edmonton International Airport (YEG). Canadian airport codes start with "Y" (yes, weather station) or "Z" (historical). The remaining two letters often derive from the city name or former identifiers:
IATA codes are not always intuitive (e.g., YYZ = Toronto Pearson, YUL = Montréal). YEG has been Edmonton's code since the 1940s and is now used colloquially for the city itself.