The current OSM/Wikidata based airport coordinate database assumes one coordinate per airport. This works ok for anything but "multi-airports", ie. airports that have terminals spread out so far that they are conceptually multiple airports sharing the same runways (LHR, CDG, MAD, BCN, ICN, PEK, etc). To handle those correctly, we need to consider the terminal as well during lookup, not just the IATA code.

There's also the question whether these are enough cases to justify an automatic OSM-based approach, or if this easier done with a small manually maintained table.