| Piqua to Noventa Vicentina | 4,571.78 mi (7,357.56 km) |
| Piqua to Novi di Modena | 4,561.04 mi (7,340.28 km) |
| Piqua to Novi Ligure | 4,479.19 mi (7,208.56 km) |
| Piqua to Nuoro | 4,671.75 mi (7,518.45 km) |
| Piqua to Occhiobello | 4,587.63 mi (7,383.09 km) |
| Piqua to Oderzo | 4,591.12 mi (7,388.70 km) |
| Piqua to Oggiono | 4,464.38 mi (7,184.73 km) |
| Piqua to Olbia | 4,655.58 mi (7,492.43 km) |
| Piqua to Oleggio | 4,441.88 mi (7,148.52 km) |
| Piqua to Olgiate Comasco | 4,448.77 mi (7,159.60 km) |
| Piqua to Olgiate Olona | 4,450.89 mi (7,163.01 km) |
| Piqua to Omegna | 4,422.45 mi (7,117.24 km) |
| Piqua to Opera | 4,473.77 mi (7,199.83 km) |
| Piqua to Oppeano | 4,556.98 mi (7,333.75 km) |
| Piqua to Orbassano | 4,418.30 mi (7,110.57 km) |
