| Oconomowoc to Norwich | 3,938.27 mi (6,338.04 km) |
| Oconomowoc to Nottingham | 3,837.95 mi (6,176.58 km) |
| Oconomowoc to Nuneaton | 3,840.07 mi (6,179.99 km) |
| Oconomowoc to Oadby | 3,852.14 mi (6,199.43 km) |
| Oconomowoc to Oakengates | 3,798.00 mi (6,112.29 km) |
| Oconomowoc to Oakham | 3,862.49 mi (6,216.07 km) |
| Oconomowoc to Oldbury | 3,820.25 mi (6,148.10 km) |
| Oconomowoc to Oldham | 3,783.69 mi (6,089.25 km) |
| Oconomowoc to Ollerton | 3,834.78 mi (6,171.48 km) |
| Oconomowoc to Olton | 3,830.24 mi (6,164.18 km) |
| Oconomowoc to Omagh | 3,563.07 mi (5,734.21 km) |
| Oconomowoc to Ormesby | 3,786.21 mi (6,093.32 km) |
| Oconomowoc to Ormskirk | 3,754.74 mi (6,042.68 km) |
| Oconomowoc to Orpington | 3,936.69 mi (6,335.49 km) |
| Oconomowoc to Ossett | 3,799.05 mi (6,113.98 km) |
