| River Forest to Norwich | 3,971.04 mi (6,390.78 km) |
| River Forest to Nottingham | 3,870.01 mi (6,228.17 km) |
| River Forest to Nuneaton | 3,871.29 mi (6,230.24 km) |
| River Forest to Oadby | 3,883.68 mi (6,250.18 km) |
| River Forest to Oakengates | 3,829.02 mi (6,162.21 km) |
| River Forest to Oakham | 3,894.31 mi (6,267.28 km) |
| River Forest to Oldbury | 3,851.17 mi (6,197.87 km) |
| River Forest to Oldham | 3,816.23 mi (6,141.62 km) |
| River Forest to Ollerton | 3,867.29 mi (6,223.80 km) |
| River Forest to Olton | 3,861.16 mi (6,213.94 km) |
| River Forest to Omagh | 3,595.09 mi (5,785.74 km) |
| River Forest to Ormesby | 3,820.79 mi (6,148.97 km) |
| River Forest to Ormskirk | 3,786.96 mi (6,094.53 km) |
| River Forest to Orpington | 3,966.91 mi (6,384.13 km) |
| River Forest to Ossett | 3,832.06 mi (6,167.10 km) |
