| Friern Barnet to Olympia Heights (Florida) | 4,434.08 mi (7,135.96 km) |
| Friern Barnet to Omaha (Nebraska) | 4,285.86 mi (6,897.43 km) |
| Friern Barnet to On Top of the World Designated Place (Florida) | 4,345.81 mi (6,993.90 km) |
| Friern Barnet to Onalaska (Wisconsin) | 3,982.71 mi (6,409.56 km) |
| Friern Barnet to Oneida (New York) | 3,423.08 mi (5,508.92 km) |
| Friern Barnet to Oneonta (New York) | 3,425.65 mi (5,513.06 km) |
| Friern Barnet to Ontario (California) | 5,414.93 mi (8,714.49 km) |
| Friern Barnet to Ontario (Oregon) | 4,831.09 mi (7,774.89 km) |
| Friern Barnet to Opa-locka (Florida) | 4,421.64 mi (7,115.94 km) |
| Friern Barnet to Opelika (Alabama) | 4,296.71 mi (6,914.88 km) |
| Friern Barnet to Opelousas (Louisiana) | 4,674.56 mi (7,522.99 km) |
| Friern Barnet to Orange (California) | 5,435.33 mi (8,747.32 km) |
| Friern Barnet to Orange (Texas) | 4,762.13 mi (7,663.91 km) |
| Friern Barnet to Orange City (Florida) | 4,312.62 mi (6,940.49 km) |
| Friern Barnet to Orangeburg (South Carolina) | 4,071.35 mi (6,552.20 km) |
