| Alpena to Noventa Vicentina | 4,325.96 mi (6,961.96 km) |
| Alpena to Novi di Modena | 4,317.91 mi (6,949.00 km) |
| Alpena to Novi Ligure | 4,240.66 mi (6,824.68 km) |
| Alpena to Nuoro | 4,449.80 mi (7,161.26 km) |
| Alpena to Occhiobello | 4,343.09 mi (6,989.52 km) |
| Alpena to Oderzo | 4,341.66 mi (6,987.23 km) |
| Alpena to Oggiono | 4,220.76 mi (6,792.65 km) |
| Alpena to Olbia | 4,430.86 mi (7,130.78 km) |
| Alpena to Oleggio | 4,200.31 mi (6,759.75 km) |
| Alpena to Olgiate Comasco | 4,205.86 mi (6,768.67 km) |
| Alpena to Olgiate Olona | 4,208.72 mi (6,773.28 km) |
| Alpena to Omegna | 4,180.20 mi (6,727.38 km) |
| Alpena to Opera | 4,231.95 mi (6,810.67 km) |
| Alpena to Oppeano | 4,311.76 mi (6,939.11 km) |
| Alpena to Orbassano | 4,181.19 mi (6,728.97 km) |
