| Donostia to Oswego (Illinois) | 4,187.66 mi (6,739.39 km) |
| Donostia to Oswego (New York) | 3,607.20 mi (5,805.22 km) |
| Donostia to Otsego (Minnesota) | 4,269.22 mi (6,870.64 km) |
| Donostia to Ottawa (Illinois) | 4,221.28 mi (6,793.49 km) |
| Donostia to Ottawa (Kansas) | 4,608.91 mi (7,417.33 km) |
| Donostia to Ottumwa (Iowa) | 4,387.95 mi (7,061.73 km) |
| Donostia to Overland (Missouri) | 4,393.19 mi (7,070.15 km) |
| Donostia to Overland Park (Kansas) | 4,572.18 mi (7,358.21 km) |
| Donostia to Overlea (Maryland) | 3,744.16 mi (6,025.64 km) |
| Donostia to Oviedo (Florida) | 4,376.91 mi (7,043.95 km) |
| Donostia to Owasso (Oklahoma) | 4,732.22 mi (7,615.77 km) |
| Donostia to Owatonna (Minnesota) | 4,299.51 mi (6,919.39 km) |
| Donostia to Owensboro (Kentucky) | 4,286.55 mi (6,898.53 km) |
| Donostia to Owings Mills (Maryland) | 3,755.15 mi (6,043.34 km) |
| Donostia to Owosso (Michigan) | 3,959.64 mi (6,372.42 km) |
