| Giessen to Novi di Modena | 406.56 mi (654.30 km) |
| Giessen to Novi Ligure | 402.44 mi (647.67 km) |
| Giessen to Nuoro | 710.08 mi (1,142.76 km) |
| Giessen to Occhiobello | 413.87 mi (666.05 km) |
| Giessen to Oderzo | 375.61 mi (604.48 km) |
| Giessen to Oggiono | 333.13 mi (536.13 km) |
| Giessen to Olbia | 669.09 mi (1,076.80 km) |
| Giessen to Oleggio | 344.32 mi (554.12 km) |
| Giessen to Olgiate Comasco | 331.93 mi (534.20 km) |
| Giessen to Olgiate Olona | 342.16 mi (550.65 km) |
| Giessen to Omegna | 325.32 mi (523.55 km) |
| Giessen to Opera | 360.18 mi (579.66 km) |
| Giessen to Oppeano | 383.11 mi (616.56 km) |
| Giessen to Orbassano | 388.80 mi (625.72 km) |
| Giessen to Orbetello | 575.47 mi (926.13 km) |
