| Zagarolo to Nottingham | 1,005.40 mi (1,618.03 km) |
| Zagarolo to Nuneaton | 994.72 mi (1,600.85 km) |
| Zagarolo to Oadby | 986.21 mi (1,587.15 km) |
| Zagarolo to Oakengates | 1,033.54 mi (1,663.31 km) |
| Zagarolo to Oakham | 979.29 mi (1,576.02 km) |
| Zagarolo to Oldbury | 1,011.13 mi (1,627.26 km) |
| Zagarolo to Oldham | 1,062.52 mi (1,709.96 km) |
| Zagarolo to Ollerton | 1,013.56 mi (1,631.16 km) |
| Zagarolo to Olton | 1,001.41 mi (1,611.61 km) |
| Zagarolo to Omagh | 1,270.24 mi (2,044.25 km) |
| Zagarolo to Ormesby | 1,085.97 mi (1,747.70 km) |
| Zagarolo to Ormskirk | 1,086.78 mi (1,749.00 km) |
| Zagarolo to Orpington | 891.91 mi (1,435.40 km) |
| Zagarolo to Ossett | 1,053.33 mi (1,695.17 km) |
| Zagarolo to Oswaldtwistle | 1,080.17 mi (1,738.36 km) |
