There seems to be a conflict here. The author of the linked article interprets the guideline, "New airports can only be added by OpenBSD developers who have visited an airport and thereby have verified its existence," as only requiring that you have been to the airport, not necessarily having flown from:

> Once again, the more astute reader will not have missed the fact that the rules do not stipulate any flying requirements. Neither did henning@, who not long after airport.7 was committed, added an entry for XFW, (the Airbus factory) which he had visited but not flown from.

Fair enough - he wrote the requirement, after all.

However, the Caveat in the man page seems to contradict this, and indicates that you do have to fly in:

> There are also railway stations with IATA codes. These may not be listed, except if someone landed there by plane and survived to update the file.