| Letchworth to Oerlinghausen | 378.45 mi (609.05 km) |
| Letchworth to Oestrich-Winkel | 382.88 mi (616.18 km) |
| Letchworth to Offenburg | 434.44 mi (699.17 km) |
| Letchworth to Oftersheim | 425.57 mi (684.88 km) |
| Letchworth to Ohrdruf | 478.68 mi (770.37 km) |
| Letchworth to Ohringen | 467.50 mi (752.37 km) |
| Letchworth to Olbernhau | 591.72 mi (952.28 km) |
| Letchworth to Olching | 573.69 mi (923.27 km) |
| Letchworth to Oldenburg | 363.47 mi (584.95 km) |
| Letchworth to Oldenburg in Holstein | 487.13 mi (783.96 km) |
| Letchworth to Olfen | 325.31 mi (523.54 km) |
| Letchworth to Olpe | 352.94 mi (568.01 km) |
| Letchworth to Olsberg | 375.70 mi (604.64 km) |
| Letchworth to Oranienburg | 569.84 mi (917.07 km) |
| Letchworth to Ortenberg | 417.28 mi (671.55 km) |
