| Duncan to Norwich | 4,715.70 mi (7,589.18 km) |
| Duncan to Nottingham | 4,615.06 mi (7,427.23 km) |
| Duncan to Nuneaton | 4,616.77 mi (7,429.97 km) |
| Duncan to Oadby | 4,629.01 mi (7,449.67 km) |
| Duncan to Oakengates | 4,574.58 mi (7,362.08 km) |
| Duncan to Oakham | 4,639.49 mi (7,466.54 km) |
| Duncan to Oldbury | 4,596.78 mi (7,397.81 km) |
| Duncan to Oldham | 4,561.01 mi (7,340.23 km) |
| Duncan to Ollerton | 4,612.09 mi (7,422.45 km) |
| Duncan to Olton | 4,606.77 mi (7,413.88 km) |
| Duncan to Omagh | 4,340.15 mi (6,984.79 km) |
| Duncan to Ormesby | 4,564.17 mi (7,345.33 km) |
| Duncan to Ormskirk | 4,531.93 mi (7,293.43 km) |
| Duncan to Orpington | 4,712.81 mi (7,584.54 km) |
| Duncan to Ossett | 4,576.55 mi (7,365.25 km) |
