| Euclid to Noventa Vicentina | 4,398.58 mi (7,078.83 km) |
| Euclid to Novi di Modena | 4,387.71 mi (7,061.34 km) |
| Euclid to Novi Ligure | 4,305.69 mi (6,929.34 km) |
| Euclid to Nuoro | 4,498.11 mi (7,239.00 km) |
| Euclid to Occhiobello | 4,414.37 mi (7,104.25 km) |
| Euclid to Oderzo | 4,418.14 mi (7,110.32 km) |
| Euclid to Oggiono | 4,291.09 mi (6,905.84 km) |
| Euclid to Olbia | 4,481.91 mi (7,212.93 km) |
| Euclid to Oleggio | 4,268.50 mi (6,869.48 km) |
| Euclid to Olgiate Comasco | 4,275.45 mi (6,880.66 km) |
| Euclid to Olgiate Olona | 4,277.53 mi (6,884.02 km) |
| Euclid to Omegna | 4,249.09 mi (6,838.26 km) |
| Euclid to Opera | 4,300.39 mi (6,920.81 km) |
| Euclid to Oppeano | 4,383.75 mi (7,054.97 km) |
| Euclid to Orbassano | 4,244.76 mi (6,831.29 km) |
