| South Houston to Norwich | 4,872.88 mi (7,842.14 km) |
| South Houston to Nottingham | 4,770.09 mi (7,676.72 km) |
| South Houston to Nuneaton | 4,768.78 mi (7,674.62 km) |
| South Houston to Oadby | 4,782.10 mi (7,696.05 km) |
| South Houston to Oakengates | 4,726.05 mi (7,605.84 km) |
| South Houston to Oakham | 4,793.55 mi (7,714.48 km) |
| South Houston to Oldbury | 4,747.82 mi (7,640.88 km) |
| South Houston to Oldham | 4,717.98 mi (7,592.85 km) |
| South Houston to Ollerton | 4,768.76 mi (7,674.57 km) |
| South Houston to Olton | 4,757.75 mi (7,656.86 km) |
| South Houston to Omagh | 4,496.20 mi (7,235.93 km) |
| South Houston to Ormesby | 4,728.39 mi (7,609.61 km) |
| South Houston to Ormskirk | 4,687.86 mi (7,544.39 km) |
| South Houston to Orpington | 4,860.81 mi (7,822.72 km) |
| South Houston to Ossett | 4,735.13 mi (7,620.46 km) |
