| South Portland to Oschatz | 3,717.50 mi (5,982.74 km) |
| South Portland to Oschersleben | 3,624.22 mi (5,832.62 km) |
| South Portland to Osnabruck | 3,493.08 mi (5,621.57 km) |
| South Portland to Ostbevern | 3,491.85 mi (5,619.59 km) |
| South Portland to Osterburg | 3,621.24 mi (5,827.83 km) |
| South Portland to Ostercappeln | 3,498.36 mi (5,630.06 km) |
| South Portland to Osterhofen | 3,797.84 mi (6,112.04 km) |
| South Portland to Osterholz-Scharmbeck | 3,496.45 mi (5,626.99 km) |
| South Portland to Osternienburg | 3,660.16 mi (5,890.46 km) |
| South Portland to Osterode | 3,594.22 mi (5,784.34 km) |
| South Portland to Osterwieck | 3,605.19 mi (5,801.99 km) |
| South Portland to Ostfildern | 3,644.54 mi (5,865.33 km) |
| South Portland to Osthofen | 3,577.66 mi (5,757.69 km) |
| South Portland to Ostrhauderfehn | 3,453.94 mi (5,558.58 km) |
| South Portland to Ostringen | 3,607.75 mi (5,806.11 km) |
