| Holyhead to Ondokuzmayis | 2,037.01 mi (3,278.25 km) |
| Holyhead to Ordu | 2,132.70 mi (3,432.24 km) |
| Holyhead to Ortahisar | 2,114.42 mi (3,402.83 km) |
| Holyhead to Ortakent | 1,889.98 mi (3,041.63 km) |
| Holyhead to Ortaklar | 1,859.14 mi (2,992.00 km) |
| Holyhead to Ortakoy | 2,075.82 mi (3,340.70 km) |
| Holyhead to Ortakoy | 2,056.00 mi (3,308.81 km) |
| Holyhead to Osmaneli | 1,841.27 mi (2,963.24 km) |
| Holyhead to Osmaniye | 2,242.28 mi (3,608.60 km) |
| Holyhead to Ozdere | 1,838.32 mi (2,958.49 km) |
| Holyhead to Palu | 2,317.39 mi (3,729.47 km) |
| Holyhead to Pamukkale | 1,919.85 mi (3,089.70 km) |
| Holyhead to Patnos | 2,413.50 mi (3,884.15 km) |
| Holyhead to Pazar | 2,099.55 mi (3,378.90 km) |
| Holyhead to Pazarcik | 2,265.16 mi (3,645.43 km) |
