| Alpena to Nasaud | 4,703.61 mi (7,569.73 km) |
| Alpena to Navodari | 4,991.53 mi (8,033.08 km) |
| Alpena to Negresti-Oas | 4,642.51 mi (7,471.39 km) |
| Alpena to Nehoiu | 4,861.60 mi (7,823.98 km) |
| Alpena to Ocna Mures | 4,727.40 mi (7,608.02 km) |
| Alpena to Odobesti | 4,867.23 mi (7,833.05 km) |
| Alpena to Odorheiu Secuiesc | 4,780.57 mi (7,693.58 km) |
| Alpena to Oltenita | 4,935.29 mi (7,942.59 km) |
| Alpena to Onesti | 4,833.04 mi (7,778.02 km) |
| Alpena to Oradea | 4,628.06 mi (7,448.14 km) |
| Alpena to Orastie | 4,730.09 mi (7,612.35 km) |
| Alpena to Oravita | 4,714.62 mi (7,587.45 km) |
| Alpena to Orsova | 4,754.92 mi (7,652.30 km) |
| Alpena to Otelu Rosu | 4,715.92 mi (7,589.54 km) |
| Alpena to Otopeni | 4,892.83 mi (7,874.25 km) |
