| Royston to Grottaferrata | 925.29 mi (1,489.11 km) |
| Royston to Grottaglie | 1,146.48 mi (1,845.08 km) |
| Royston to Grottammare | 897.97 mi (1,445.14 km) |
| Royston to Grugliasco | 593.65 mi (955.39 km) |
| Royston to Grumo Appula | 1,096.19 mi (1,764.15 km) |
| Royston to Grumo Nevano | 1,021.76 mi (1,644.36 km) |
| Royston to Gualdo Tadino | 849.76 mi (1,367.55 km) |
| Royston to Guardiagrele | 951.15 mi (1,530.73 km) |
| Royston to Guastalla | 693.10 mi (1,115.44 km) |
| Royston to Gubbio | 836.59 mi (1,346.37 km) |
| Royston to Guspini | 958.29 mi (1,542.22 km) |
| Royston to Gussago | 641.12 mi (1,031.78 km) |
| Royston to Iesi | 849.45 mi (1,367.05 km) |
| Royston to Iesolo | 729.66 mi (1,174.28 km) |
| Royston to Iglesias | 970.09 mi (1,561.20 km) |
