| Hoyo de Manzanares to Oakley (California) | 5,734.94 mi (9,229.49 km) |
| Hoyo de Manzanares to Oakton (Virginia) | 3,781.56 mi (6,085.83 km) |
| Hoyo de Manzanares to Oakville (Missouri) | 4,406.56 mi (7,091.67 km) |
| Hoyo de Manzanares to Oatfield (Oregon) | 5,389.49 mi (8,673.54 km) |
| Hoyo de Manzanares to Ocala (Florida) | 4,360.77 mi (7,017.98 km) |
| Hoyo de Manzanares to Ocean Acres (New Jersey) | 3,610.59 mi (5,810.69 km) |
| Hoyo de Manzanares to Ocean City (New Jersey) | 3,640.20 mi (5,858.34 km) |
| Hoyo de Manzanares to Ocean Pines (Maryland) | 3,693.51 mi (5,944.12 km) |
| Hoyo de Manzanares to Ocean Pointe (Hawaii) | 7,845.38 mi (12,625.91 km) |
| Hoyo de Manzanares to Ocean Springs (Mississippi) | 4,641.99 mi (7,470.56 km) |
| Hoyo de Manzanares to Oceanside (California) | 5,804.19 mi (9,340.95 km) |
| Hoyo de Manzanares to Oceanside (New York) | 3,553.90 mi (5,719.45 km) |
| Hoyo de Manzanares to Ocoee (Florida) | 4,352.54 mi (7,004.74 km) |
| Hoyo de Manzanares to Oconomowoc (Wisconsin) | 4,159.34 mi (6,693.81 km) |
| Hoyo de Manzanares to Odenton (Maryland) | 3,746.89 mi (6,030.04 km) |
