| Owings Mills to Norwich | 3,664.09 mi (5,896.78 km) |
| Owings Mills to Nottingham | 3,560.08 mi (5,729.40 km) |
| Owings Mills to Nuneaton | 3,556.12 mi (5,723.02 km) |
| Owings Mills to Oadby | 3,570.28 mi (5,745.80 km) |
| Owings Mills to Oakengates | 3,513.20 mi (5,653.95 km) |
| Owings Mills to Oakham | 3,582.51 mi (5,765.49 km) |
| Owings Mills to Oldbury | 3,534.45 mi (5,688.15 km) |
| Owings Mills to Oldham | 3,510.16 mi (5,649.05 km) |
| Owings Mills to Ollerton | 3,560.26 mi (5,729.68 km) |
| Owings Mills to Olton | 3,544.26 mi (5,703.94 km) |
| Owings Mills to Omagh | 3,289.31 mi (5,293.63 km) |
| Owings Mills to Ormesby | 3,527.65 mi (5,677.21 km) |
| Owings Mills to Ormskirk | 3,479.32 mi (5,599.42 km) |
| Owings Mills to Orpington | 3,644.19 mi (5,864.76 km) |
| Owings Mills to Ossett | 3,528.71 mi (5,678.91 km) |
