| Niederkassel to Nottingham | 378.66 mi (609.39 km) |
| Niederkassel to Nuneaton | 382.62 mi (615.77 km) |
| Niederkassel to Oadby | 368.15 mi (592.49 km) |
| Niederkassel to Oakengates | 425.52 mi (684.81 km) |
| Niederkassel to Oakham | 355.87 mi (572.72 km) |
| Niederkassel to Oldbury | 404.69 mi (651.29 km) |
| Niederkassel to Oldham | 430.62 mi (693.01 km) |
| Niederkassel to Ollerton | 379.75 mi (611.14 km) |
| Niederkassel to Olton | 395.03 mi (635.74 km) |
| Niederkassel to Omagh | 652.37 mi (1,049.88 km) |
| Niederkassel to Ormesby | 429.56 mi (691.31 km) |
| Niederkassel to Ormskirk | 460.62 mi (741.29 km) |
| Niederkassel to Orpington | 303.25 mi (488.03 km) |
| Niederkassel to Ossett | 414.21 mi (666.61 km) |
| Niederkassel to Oswaldtwistle | 446.34 mi (718.32 km) |
