| South Portland to Oststeinbek | 3,539.13 mi (5,695.68 km) |
| South Portland to Ottendorf-Okrilla | 3,748.98 mi (6,033.40 km) |
| South Portland to Ottersberg | 3,512.95 mi (5,653.55 km) |
| South Portland to Ottobrunn | 3,764.15 mi (6,057.81 km) |
| South Portland to Ottweiler | 3,540.57 mi (5,697.99 km) |
| South Portland to Overath | 3,500.58 mi (5,633.64 km) |
| South Portland to Oyten | 3,508.99 mi (5,647.17 km) |
| South Portland to Paderborn | 3,536.25 mi (5,691.04 km) |
| South Portland to Papenburg | 3,446.95 mi (5,547.33 km) |
| South Portland to Parchim | 3,605.24 mi (5,802.07 km) |
| South Portland to Pasewalk | 3,683.25 mi (5,927.61 km) |
| South Portland to Passau | 3,819.88 mi (6,147.51 km) |
| South Portland to Pattensen | 3,559.91 mi (5,729.11 km) |
| South Portland to Pegnitz | 3,704.95 mi (5,962.54 km) |
| South Portland to Peine | 3,576.32 mi (5,755.53 km) |
