| Boadilla del Monte to Orangevale (California) | 5,693.69 mi (9,163.11 km) |
| Boadilla del Monte to Orchards (Washington) | 5,385.87 mi (8,667.71 km) |
| Boadilla del Monte to Orcutt (California) | 5,856.21 mi (9,424.66 km) |
| Boadilla del Monte to Oregon (Ohio) | 3,988.64 mi (6,419.10 km) |
| Boadilla del Monte to Oregon (Wisconsin) | 4,213.51 mi (6,781.00 km) |
| Boadilla del Monte to Oregon City (Oregon) | 5,405.44 mi (8,699.21 km) |
| Boadilla del Monte to Orem (Utah) | 5,252.94 mi (8,453.78 km) |
| Boadilla del Monte to Orinda (California) | 5,769.92 mi (9,285.79 km) |
| Boadilla del Monte to Orland Park (Illinois) | 4,190.84 mi (6,744.50 km) |
| Boadilla del Monte to Orlando (Florida) | 4,351.16 mi (7,002.52 km) |
| Boadilla del Monte to Ormond Beach (Florida) | 4,308.14 mi (6,933.28 km) |
| Boadilla del Monte to Oro Valley (Arizona) | 5,588.24 mi (8,993.41 km) |
| Boadilla del Monte to Oroville (California) | 5,665.17 mi (9,117.21 km) |
| Boadilla del Monte to Oshkosh (Wisconsin) | 4,140.24 mi (6,663.07 km) |
| Boadilla del Monte to Oskaloosa (Iowa) | 4,414.43 mi (7,104.35 km) |
