| Tuam to Novi di Modena | 1,066.71 mi (1,716.70 km) |
| Tuam to Novi Ligure | 996.25 mi (1,603.32 km) |
| Tuam to Nuoro | 1,245.14 mi (2,003.85 km) |
| Tuam to Occhiobello | 1,090.70 mi (1,755.31 km) |
| Tuam to Oderzo | 1,088.13 mi (1,751.18 km) |
| Tuam to Oggiono | 969.50 mi (1,560.25 km) |
| Tuam to Olbia | 1,217.58 mi (1,959.51 km) |
| Tuam to Oleggio | 951.52 mi (1,531.33 km) |
| Tuam to Olgiate Comasco | 955.39 mi (1,537.56 km) |
| Tuam to Olgiate Olona | 959.10 mi (1,543.52 km) |
| Tuam to Omegna | 930.67 mi (1,497.76 km) |
| Tuam to Opera | 982.62 mi (1,581.38 km) |
| Tuam to Oppeano | 1,059.04 mi (1,704.36 km) |
| Tuam to Orbassano | 940.42 mi (1,513.45 km) |
| Tuam to Orbetello | 1,195.54 mi (1,924.03 km) |
