| IATA/ICAO Sign | Name of airline |
|---|---|
| CKS | Kalitta Air |
| KAJ | Karthago Airlines |
| MVD | Kavminvodyavia |
| KQA | Kenya Airways |
| KFR | Kingfisher Airlines |
| KLC | KLM Cityhopper |
| KLM | KLM Royal Dutch Airlines |
| KGL | Kolavia - Kogalymavia |
| KBR | Koral Blue |
| KAL | Korean Air |
| KSM | Kosmos Airlines |
| KJC | Krasair |
| KYV | KTHY - Kibris Turk Hava Yollari |
| KAC | Kuwait Airways |
| KZU | Kuzu Airlines |