| Great Dunmow to Oberkirch | 411.80 mi (662.72 km) |
| Great Dunmow to Obernburg am Main | 407.57 mi (655.92 km) |
| Great Dunmow to Obernkirchen | 372.65 mi (599.72 km) |
| Great Dunmow to Oberschleissheim | 555.68 mi (894.28 km) |
| Great Dunmow to Oberstdorf | 539.63 mi (868.46 km) |
| Great Dunmow to Obertraubling | 556.39 mi (895.42 km) |
| Great Dunmow to Obertshausen | 388.88 mi (625.85 km) |
| Great Dunmow to Oberursel | 374.86 mi (603.27 km) |
| Great Dunmow to Ochsenfurt | 450.69 mi (725.31 km) |
| Great Dunmow to Ochsenhausen | 499.84 mi (804.41 km) |
| Great Dunmow to Ochtrup | 291.02 mi (468.35 km) |
| Great Dunmow to Odenthal | 296.46 mi (477.10 km) |
| Great Dunmow to Oelde | 332.24 mi (534.69 km) |
| Great Dunmow to Oelsnitz | 520.88 mi (838.28 km) |
| Great Dunmow to Oer-Erkenschwick | 294.95 mi (474.68 km) |
