| Merthyr Tudful to Ondokuzmayis | 1,973.03 mi (3,175.29 km) |
| Merthyr Tudful to Ordu | 2,070.14 mi (3,331.57 km) |
| Merthyr Tudful to Ortahisar | 2,040.55 mi (3,283.96 km) |
| Merthyr Tudful to Ortakent | 1,799.49 mi (2,895.99 km) |
| Merthyr Tudful to Ortaklar | 1,770.76 mi (2,849.76 km) |
| Merthyr Tudful to Ortakoy | 2,000.86 mi (3,220.07 km) |
| Merthyr Tudful to Ortakoy | 1,987.21 mi (3,198.11 km) |
| Merthyr Tudful to Osmaneli | 1,763.71 mi (2,838.42 km) |
| Merthyr Tudful to Osmaniye | 2,166.99 mi (3,487.44 km) |
| Merthyr Tudful to Ozdere | 1,749.59 mi (2,815.69 km) |
| Merthyr Tudful to Palu | 2,252.05 mi (3,624.33 km) |
| Merthyr Tudful to Pamukkale | 1,834.39 mi (2,952.17 km) |
| Merthyr Tudful to Patnos | 2,354.10 mi (3,788.55 km) |
| Merthyr Tudful to Pazar | 2,032.43 mi (3,270.88 km) |
| Merthyr Tudful to Pazarcik | 2,192.56 mi (3,528.59 km) |
