| Friern Barnet to Nottingham | 101.67 mi (163.63 km) |
| Friern Barnet to Nuneaton | 83.97 mi (135.13 km) |
| Friern Barnet to Oadby | 78.48 mi (126.30 km) |
| Friern Barnet to Oakengates | 122.62 mi (197.34 km) |
| Friern Barnet to Oakham | 77.05 mi (124.00 km) |
| Friern Barnet to Oldbury | 100.14 mi (161.16 km) |
| Friern Barnet to Oldham | 156.76 mi (252.28 km) |
| Friern Barnet to Ollerton | 115.53 mi (185.93 km) |
| Friern Barnet to Olton | 90.30 mi (145.33 km) |
| Friern Barnet to Omagh | 360.07 mi (579.47 km) |
| Friern Barnet to Ormesby | 207.29 mi (333.60 km) |
| Friern Barnet to Ormskirk | 177.01 mi (284.87 km) |
| Friern Barnet to Orpington | 19.84 mi (31.94 km) |
| Friern Barnet to Ossett | 154.77 mi (249.08 km) |
| Friern Barnet to Oswaldtwistle | 174.42 mi (280.70 km) |
