This is just an IATA (International Air Transport Association) code. IATA codes are used in aviation to identify and differentiate airports. That’s why a Reykjavik Keflavik Intl Airport flight would often be abbreviated as a KEF flight. This flight destination has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Reykjavik Domestic Airport (RKV).
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