| Fort Collins to Karditsa | 5,984.93 mi (9,631.81 km) |
| Fort Collins to Kastoria | 5,900.99 mi (9,496.73 km) |
| Fort Collins to Katerini | 5,954.21 mi (9,582.38 km) |
| Fort Collins to Keratsini | 6,117.35 mi (9,844.92 km) |
| Fort Collins to Kerkyra | 5,905.37 mi (9,503.77 km) |
| Fort Collins to Kiato | 6,086.74 mi (9,795.66 km) |
| Fort Collins to Kifisia | 6,117.31 mi (9,844.86 km) |
| Fort Collins to Kilkis | 5,926.27 mi (9,537.41 km) |
| Fort Collins to Komotini | 5,998.16 mi (9,653.11 km) |
| Fort Collins to Korinthos | 6,096.51 mi (9,811.38 km) |
| Fort Collins to Koropi | 6,129.34 mi (9,864.23 km) |
| Fort Collins to Korydallos | 6,117.50 mi (9,845.17 km) |
| Fort Collins to Kos | 6,295.00 mi (10,130.82 km) |
| Fort Collins to Kozani | 5,929.47 mi (9,542.55 km) |
| Fort Collins to Lagos | 5,988.19 mi (9,637.07 km) |
