| Holyhead to Oschatz | 760.15 mi (1,223.35 km) |
| Holyhead to Oschersleben | 670.12 mi (1,078.46 km) |
| Holyhead to Osnabruck | 533.86 mi (859.16 km) |
| Holyhead to Ostbevern | 529.40 mi (851.99 km) |
| Holyhead to Osterburg | 680.66 mi (1,095.42 km) |
| Holyhead to Ostercappeln | 540.43 mi (869.74 km) |
| Holyhead to Osterhofen | 828.12 mi (1,332.74 km) |
| Holyhead to Osterholz-Scharmbeck | 554.37 mi (892.18 km) |
| Holyhead to Osternienburg | 705.51 mi (1,135.41 km) |
| Holyhead to Osterode | 634.07 mi (1,020.43 km) |
| Holyhead to Osterwieck | 648.96 mi (1,044.39 km) |
| Holyhead to Ostfildern | 679.61 mi (1,093.72 km) |
| Holyhead to Osthofen | 609.28 mi (980.53 km) |
| Holyhead to Ostrhauderfehn | 506.40 mi (814.97 km) |
| Holyhead to Ostringen | 641.05 mi (1,031.67 km) |
