| Catonsville to Norwich | 3,668.94 mi (5,904.59 km) |
| Catonsville to Nottingham | 3,564.91 mi (5,737.16 km) |
| Catonsville to Nuneaton | 3,560.84 mi (5,730.62 km) |
| Catonsville to Oadby | 3,575.03 mi (5,753.46 km) |
| Catonsville to Oakengates | 3,517.92 mi (5,661.55 km) |
| Catonsville to Oakham | 3,587.29 mi (5,773.19 km) |
| Catonsville to Oldbury | 3,539.15 mi (5,695.71 km) |
| Catonsville to Oldham | 3,515.06 mi (5,656.95 km) |
| Catonsville to Ollerton | 3,565.14 mi (5,737.53 km) |
| Catonsville to Olton | 3,548.96 mi (5,711.50 km) |
| Catonsville to Omagh | 3,294.28 mi (5,301.63 km) |
| Catonsville to Ormesby | 3,532.79 mi (5,685.48 km) |
| Catonsville to Ormskirk | 3,484.20 mi (5,607.28 km) |
| Catonsville to Orpington | 3,648.75 mi (5,872.10 km) |
| Catonsville to Ossett | 3,533.66 mi (5,686.88 km) |
