| Horsell to Odessa (Texas) | 4,995.62 mi (8,039.67 km) |
| Horsell to Ogden (Utah) | 4,832.28 mi (7,776.80 km) |
| Horsell to Oildale (California) | 5,381.26 mi (8,660.30 km) |
| Horsell to Ojus (Florida) | 4,400.90 mi (7,082.56 km) |
| Horsell to Okemos (Michigan) | 3,775.30 mi (6,075.76 km) |
| Horsell to Oklahoma City (Oklahoma) | 4,626.27 mi (7,445.27 km) |
| Horsell to Okmulgee (Oklahoma) | 4,561.47 mi (7,340.98 km) |
| Horsell to Olathe (Kansas) | 4,352.91 mi (7,005.33 km) |
| Horsell to Old Jamestown (Missouri) | 4,182.13 mi (6,730.48 km) |
| Horsell to Oldsmar (Florida) | 4,402.17 mi (7,084.60 km) |
| Horsell to Olean (New York) | 3,567.51 mi (5,741.35 km) |
| Horsell to Olive Branch (Mississippi) | 4,353.86 mi (7,006.87 km) |
| Horsell to Olivehurst (California) | 5,249.17 mi (8,447.72 km) |
| Horsell to Olney (Maryland) | 3,641.49 mi (5,860.42 km) |
| Horsell to Olympia (Washington) | 4,829.72 mi (7,772.69 km) |
