| Douarnenez to Oswego (Illinois) | 3,927.17 mi (6,320.16 km) |
| Douarnenez to Oswego (New York) | 3,363.27 mi (5,412.66 km) |
| Douarnenez to Otsego (Minnesota) | 3,985.96 mi (6,414.78 km) |
| Douarnenez to Ottawa (Illinois) | 3,961.03 mi (6,374.66 km) |
| Douarnenez to Ottawa (Kansas) | 4,344.85 mi (6,992.35 km) |
| Douarnenez to Ottumwa (Iowa) | 4,121.53 mi (6,632.97 km) |
| Douarnenez to Overland (Missouri) | 4,139.66 mi (6,662.14 km) |
| Douarnenez to Overland Park (Kansas) | 4,308.39 mi (6,933.68 km) |
| Douarnenez to Overlea (Maryland) | 3,520.34 mi (5,665.44 km) |
| Douarnenez to Oviedo (Florida) | 4,190.32 mi (6,743.66 km) |
| Douarnenez to Owasso (Oklahoma) | 4,474.71 mi (7,201.34 km) |
| Douarnenez to Owatonna (Minnesota) | 4,020.87 mi (6,470.97 km) |
| Douarnenez to Owensboro (Kentucky) | 4,044.24 mi (6,508.58 km) |
| Douarnenez to Owings Mills (Maryland) | 3,530.43 mi (5,681.68 km) |
| Douarnenez to Owosso (Michigan) | 3,702.30 mi (5,958.28 km) |
