| Donostia to Orangevale (California) | 5,616.53 mi (9,038.93 km) |
| Donostia to Orchards (Washington) | 5,289.09 mi (8,511.97 km) |
| Donostia to Orcutt (California) | 5,790.27 mi (9,318.53 km) |
| Donostia to Oregon (Ohio) | 3,975.35 mi (6,397.71 km) |
| Donostia to Oregon (Wisconsin) | 4,185.13 mi (6,735.32 km) |
| Donostia to Oregon City (Oregon) | 5,309.38 mi (8,544.62 km) |
| Donostia to Orem (Utah) | 5,191.49 mi (8,354.90 km) |
| Donostia to Orinda (California) | 5,692.64 mi (9,161.41 km) |
| Donostia to Orland Park (Illinois) | 4,170.09 mi (6,711.10 km) |
| Donostia to Orlando (Florida) | 4,391.68 mi (7,067.72 km) |
| Donostia to Ormond Beach (Florida) | 4,346.26 mi (6,994.64 km) |
| Donostia to Oro Valley (Arizona) | 5,550.49 mi (8,932.65 km) |
| Donostia to Oroville (California) | 5,585.29 mi (8,988.65 km) |
| Donostia to Oshkosh (Wisconsin) | 4,109.06 mi (6,612.89 km) |
| Donostia to Oskaloosa (Iowa) | 4,386.36 mi (7,059.17 km) |
