| Greenock to Ondokuzmayis | 2,071.28 mi (3,333.40 km) |
| Greenock to Ordu | 2,163.92 mi (3,482.50 km) |
| Greenock to Ortahisar | 2,165.56 mi (3,485.12 km) |
| Greenock to Ortakent | 1,973.50 mi (3,176.04 km) |
| Greenock to Ortaklar | 1,938.73 mi (3,120.09 km) |
| Greenock to Ortakoy | 2,129.14 mi (3,426.53 km) |
| Greenock to Ortakoy | 2,098.49 mi (3,377.19 km) |
| Greenock to Osmaneli | 1,900.83 mi (3,059.08 km) |
| Greenock to Osmaniye | 2,295.29 mi (3,693.91 km) |
| Greenock to Ozdere | 1,918.71 mi (3,087.87 km) |
| Greenock to Palu | 2,352.36 mi (3,785.76 km) |
| Greenock to Pamukkale | 1,993.49 mi (3,208.21 km) |
| Greenock to Patnos | 2,437.79 mi (3,923.24 km) |
| Greenock to Pazar | 2,138.86 mi (3,442.17 km) |
| Greenock to Pazarcik | 2,313.22 mi (3,722.77 km) |
