| Houghton Regis to Grottaferrata | 933.82 mi (1,502.83 km) |
| Houghton Regis to Grottaglie | 1,157.91 mi (1,863.48 km) |
| Houghton Regis to Grottammare | 908.86 mi (1,462.67 km) |
| Houghton Regis to Grugliasco | 599.87 mi (965.39 km) |
| Houghton Regis to Grumo Appula | 1,107.49 mi (1,782.33 km) |
| Houghton Regis to Grumo Nevano | 1,030.99 mi (1,659.21 km) |
| Houghton Regis to Gualdo Tadino | 859.92 mi (1,383.91 km) |
| Houghton Regis to Guardiagrele | 961.54 mi (1,547.44 km) |
| Houghton Regis to Guastalla | 703.19 mi (1,131.68 km) |
| Houghton Regis to Gubbio | 846.68 mi (1,362.60 km) |
| Houghton Regis to Guspini | 960.39 mi (1,545.60 km) |
| Houghton Regis to Gussago | 651.63 mi (1,048.70 km) |
| Houghton Regis to Iesi | 860.37 mi (1,384.63 km) |
| Houghton Regis to Iesolo | 742.59 mi (1,195.08 km) |
| Houghton Regis to Iglesias | 971.92 mi (1,564.16 km) |
