| Alpena to Olivares | 3,895.87 mi (6,269.80 km) |
| Alpena to Olivenza | 3,804.20 mi (6,122.27 km) |
| Alpena to Olot | 4,087.86 mi (6,578.78 km) |
| Alpena to Onate | 3,847.61 mi (6,192.13 km) |
| Alpena to Onda | 4,057.89 mi (6,530.55 km) |
| Alpena to Onteniente | 4,088.20 mi (6,579.32 km) |
| Alpena to Orihuela | 4,102.73 mi (6,602.70 km) |
| Alpena to Osuna | 3,950.63 mi (6,357.93 km) |
| Alpena to Ourense | 3,636.86 mi (5,852.96 km) |
| Alpena to Oviedo | 3,688.68 mi (5,936.36 km) |
| Alpena to Paiporta | 4,072.35 mi (6,553.81 km) |
| Alpena to Pajara | 3,886.92 mi (6,255.39 km) |
| Alpena to Palafolls | 4,119.23 mi (6,629.26 km) |
| Alpena to Palafrugell | 4,126.68 mi (6,641.25 km) |
| Alpena to Palamos | 4,128.10 mi (6,643.54 km) |
