| Gaithersburg to Karditsa | 4,990.71 mi (8,031.77 km) |
| Gaithersburg to Kastoria | 4,916.03 mi (7,911.59 km) |
| Gaithersburg to Katerini | 4,978.61 mi (8,012.30 km) |
| Gaithersburg to Keratsini | 5,122.18 mi (8,243.35 km) |
| Gaithersburg to Kerkyra | 4,894.16 mi (7,876.38 km) |
| Gaithersburg to Kiato | 5,082.84 mi (8,180.04 km) |
| Gaithersburg to Kifisia | 5,125.88 mi (8,249.30 km) |
| Gaithersburg to Kilkis | 4,964.60 mi (7,989.75 km) |
| Gaithersburg to Komotini | 5,065.64 mi (8,152.36 km) |
| Gaithersburg to Korinthos | 5,093.54 mi (8,197.27 km) |
| Gaithersburg to Koropi | 5,136.06 mi (8,265.70 km) |
| Gaithersburg to Korydallos | 5,122.92 mi (8,244.54 km) |
| Gaithersburg to Kos | 5,325.41 mi (8,570.42 km) |
| Gaithersburg to Kozani | 4,946.82 mi (7,961.14 km) |
| Gaithersburg to Lagos | 5,050.91 mi (8,128.65 km) |
