| Trossingen to Novi di Modena | 244.82 mi (394.01 km) |
| Trossingen to Novi Ligure | 229.25 mi (368.94 km) |
| Trossingen to Nuoro | 537.19 mi (864.53 km) |
| Trossingen to Occhiobello | 259.01 mi (416.84 km) |
| Trossingen to Oderzo | 241.31 mi (388.35 km) |
| Trossingen to Oggiono | 161.92 mi (260.59 km) |
| Trossingen to Olbia | 496.45 mi (798.96 km) |
| Trossingen to Oleggio | 171.05 mi (275.27 km) |
| Trossingen to Olgiate Comasco | 159.15 mi (256.12 km) |
| Trossingen to Olgiate Olona | 169.15 mi (272.22 km) |
| Trossingen to Omegna | 152.22 mi (244.97 km) |
| Trossingen to Opera | 188.04 mi (302.62 km) |
| Trossingen to Oppeano | 226.58 mi (364.65 km) |
| Trossingen to Orbassano | 218.33 mi (351.37 km) |
| Trossingen to Orbetello | 409.02 mi (658.26 km) |
