| Great Dunmow to Oerlinghausen | 353.78 mi (569.35 km) |
| Great Dunmow to Oestrich-Winkel | 356.66 mi (573.98 km) |
| Great Dunmow to Offenburg | 409.14 mi (658.45 km) |
| Great Dunmow to Oftersheim | 399.47 mi (642.89 km) |
| Great Dunmow to Ohrdruf | 452.92 mi (728.91 km) |
| Great Dunmow to Ohringen | 441.35 mi (710.29 km) |
| Great Dunmow to Olbernhau | 566.12 mi (911.09 km) |
| Great Dunmow to Olching | 547.64 mi (881.35 km) |
| Great Dunmow to Oldenburg | 341.49 mi (549.57 km) |
| Great Dunmow to Oldenburg in Holstein | 467.16 mi (751.82 km) |
| Great Dunmow to Olfen | 300.13 mi (483.01 km) |
| Great Dunmow to Olpe | 326.99 mi (526.25 km) |
| Great Dunmow to Olsberg | 350.15 mi (563.51 km) |
| Great Dunmow to Oranienburg | 546.49 mi (879.50 km) |
| Great Dunmow to Ortenberg | 391.11 mi (629.43 km) |
