| Potters Bar to Oswego (Illinois) | 3,975.29 mi (6,397.61 km) |
| Potters Bar to Oswego (New York) | 3,437.30 mi (5,531.81 km) |
| Potters Bar to Otsego (Minnesota) | 4,000.86 mi (6,438.76 km) |
| Potters Bar to Ottawa (Illinois) | 4,009.24 mi (6,452.25 km) |
| Potters Bar to Ottawa (Kansas) | 4,385.24 mi (7,057.36 km) |
| Potters Bar to Ottumwa (Iowa) | 4,160.19 mi (6,695.17 km) |
| Potters Bar to Overland (Missouri) | 4,195.44 mi (6,751.91 km) |
| Potters Bar to Overland Park (Kansas) | 4,349.40 mi (6,999.69 km) |
| Potters Bar to Overlea (Maryland) | 3,616.52 mi (5,820.23 km) |
| Potters Bar to Oviedo (Florida) | 4,319.91 mi (6,952.22 km) |
| Potters Bar to Owasso (Oklahoma) | 4,523.05 mi (7,279.15 km) |
| Potters Bar to Owatonna (Minnesota) | 4,042.59 mi (6,505.92 km) |
| Potters Bar to Owensboro (Kentucky) | 4,114.77 mi (6,622.08 km) |
| Potters Bar to Owings Mills (Maryland) | 3,625.52 mi (5,834.71 km) |
| Potters Bar to Owosso (Michigan) | 3,756.37 mi (6,045.29 km) |
