| Houghton Regis to Islahiye | 2,069.38 mi (3,330.34 km) |
| Houghton Regis to Isparta | 1,788.39 mi (2,878.14 km) |
| Houghton Regis to Istanbul | 1,576.83 mi (2,537.65 km) |
| Houghton Regis to Izmir | 1,622.56 mi (2,611.26 km) |
| Houghton Regis to Kadinhani | 1,832.80 mi (2,949.60 km) |
| Houghton Regis to Kadirli | 2,031.57 mi (3,269.49 km) |
| Houghton Regis to Kagithane | 1,574.79 mi (2,534.37 km) |
| Houghton Regis to Kahramanmaras | 2,056.25 mi (3,309.22 km) |
| Houghton Regis to Kahta | 2,117.59 mi (3,407.93 km) |
| Houghton Regis to Kaman | 1,844.53 mi (2,968.48 km) |
| Houghton Regis to Kangal | 2,002.23 mi (3,222.28 km) |
| Houghton Regis to Kapakli | 1,522.83 mi (2,450.75 km) |
| Houghton Regis to Karaagac | 2,070.03 mi (3,331.39 km) |
| Houghton Regis to Karaagac | 1,523.58 mi (2,451.96 km) |
| Houghton Regis to Karabuk | 1,720.53 mi (2,768.93 km) |
