| Boulder to Islahiye | 6,590.10 mi (10,605.75 km) |
| Boulder to Isparta | 6,377.58 mi (10,263.72 km) |
| Boulder to Istanbul | 6,142.56 mi (9,885.50 km) |
| Boulder to Izmir | 6,237.59 mi (10,038.43 km) |
| Boulder to Kadinhani | 6,397.08 mi (10,295.11 km) |
| Boulder to Kadirli | 6,555.13 mi (10,549.47 km) |
| Boulder to Kagithane | 6,139.52 mi (9,880.60 km) |
| Boulder to Kahramanmaras | 6,563.88 mi (10,563.55 km) |
| Boulder to Kahta | 6,594.51 mi (10,612.84 km) |
| Boulder to Kaman | 6,372.27 mi (10,255.18 km) |
| Boulder to Kangal | 6,474.50 mi (10,419.71 km) |
| Boulder to Kapakli | 6,095.71 mi (9,810.09 km) |
| Boulder to Karaagac | 6,604.69 mi (10,629.22 km) |
| Boulder to Karaagac | 6,097.13 mi (9,812.39 km) |
| Boulder to Karabuk | 6,233.32 mi (10,031.56 km) |
