| Llanelli to Oerlinghausen | 547.51 mi (881.14 km) |
| Llanelli to Oestrich-Winkel | 542.59 mi (873.21 km) |
| Llanelli to Offenburg | 579.73 mi (932.99 km) |
| Llanelli to Oftersheim | 581.43 mi (935.72 km) |
| Llanelli to Ohrdruf | 645.69 mi (1,039.14 km) |
| Llanelli to Ohringen | 624.17 mi (1,004.50 km) |
| Llanelli to Olbernhau | 759.30 mi (1,221.98 km) |
| Llanelli to Olching | 727.51 mi (1,170.82 km) |
| Llanelli to Oldenburg | 530.56 mi (853.86 km) |
| Llanelli to Oldenburg in Holstein | 649.91 mi (1,045.93 km) |
| Llanelli to Olfen | 493.93 mi (794.90 km) |
| Llanelli to Olpe | 519.13 mi (835.46 km) |
| Llanelli to Olsberg | 543.54 mi (874.75 km) |
| Llanelli to Oranienburg | 738.40 mi (1,188.35 km) |
| Llanelli to Ortenberg | 580.96 mi (934.96 km) |
