| South Portland to Ondokuzmayis | 4,993.99 mi (8,037.05 km) |
| South Portland to Ordu | 5,086.16 mi (8,185.39 km) |
| South Portland to Ortahisar | 5,083.18 mi (8,180.58 km) |
| South Portland to Ortakent | 4,844.68 mi (7,796.75 km) |
| South Portland to Ortaklar | 4,818.58 mi (7,754.75 km) |
| South Portland to Ortakoy | 5,045.12 mi (8,119.34 km) |
| South Portland to Ortakoy | 5,020.27 mi (8,079.34 km) |
| South Portland to Osmaneli | 4,811.04 mi (7,742.62 km) |
| South Portland to Osmaniye | 5,211.62 mi (8,387.29 km) |
| South Portland to Ozdere | 4,797.11 mi (7,720.20 km) |
| South Portland to Palu | 5,275.05 mi (8,489.37 km) |
| South Portland to Pamukkale | 4,884.11 mi (7,860.22 km) |
| South Portland to Patnos | 5,356.65 mi (8,620.69 km) |
| South Portland to Pazar | 5,061.37 mi (8,145.49 km) |
| South Portland to Pazarcik | 5,232.87 mi (8,421.49 km) |
