Originally Posted by
FL370esq
Minor point but I think they are IATA codes. ICAO codes are 4-letter codes (KLAX/KDEN). However, both have North American headquarters basically side-by-each in Montréal which, of course, is home to the the most successful hockey team in the history of the NHL, even with their 30-year hiatus from hoisting the hardware. ("The curse of the scorned Forum").
Fun link here about why airport codes are the way they are.
https://www.youtube.com/watch?v=jfOUVYQnuhw&t=2s