Earlier quoted context omitted.
Your reply doesn't seem to answer my question at all. I opened both links, searched for "airport" and "IATA" and nothing relevant came up.
Well then here's a few more keywords for you. 'jet-lag', 'travel'. Hackathons tentatively take place in airport lounges.
I'm reading "hackathons may occur in airports, therefore OpenBSD should maintain a list of all airport codes."
Suppose the list didn't already exist, how would you justify adding it?