| Guastalla to Oerlinghausen | 495.61 mi (797.60 km) |
| Guastalla to Oestrich-Winkel | 372.60 mi (599.64 km) |
| Guastalla to Offenburg | 277.34 mi (446.34 km) |
| Guastalla to Oftersheim | 322.88 mi (519.63 km) |
| Guastalla to Ohrdruf | 408.45 mi (657.34 km) |
| Guastalla to Ohringen | 300.99 mi (484.39 km) |
| Guastalla to Olbernhau | 416.05 mi (669.57 km) |
| Guastalla to Olching | 228.94 mi (368.45 km) |
| Guastalla to Oldenburg | 579.11 mi (931.99 km) |
| Guastalla to Oldenburg in Holstein | 648.39 mi (1,043.49 km) |
| Guastalla to Olfen | 493.33 mi (793.94 km) |
| Guastalla to Olpe | 441.29 mi (710.19 km) |
| Guastalla to Olsberg | 455.70 mi (733.38 km) |
| Guastalla to Oranienburg | 553.91 mi (891.43 km) |
| Guastalla to Ortenberg | 383.20 mi (616.69 km) |
