| Douarnenez to Orangevale (California) | 5,302.13 mi (8,532.96 km) |
| Douarnenez to Orchards (Washington) | 4,962.11 mi (7,985.74 km) |
| Douarnenez to Orcutt (California) | 5,484.00 mi (8,825.64 km) |
| Douarnenez to Oregon (Ohio) | 3,725.22 mi (5,995.16 km) |
| Douarnenez to Oregon (Wisconsin) | 3,917.83 mi (6,305.13 km) |
| Douarnenez to Oregon City (Oregon) | 4,982.80 mi (8,019.04 km) |
| Douarnenez to Orem (Utah) | 4,890.16 mi (7,869.96 km) |
| Douarnenez to Orinda (California) | 5,378.01 mi (8,655.07 km) |
| Douarnenez to Orland Park (Illinois) | 3,910.86 mi (6,293.92 km) |
| Douarnenez to Orlando (Florida) | 4,205.41 mi (6,767.96 km) |
| Douarnenez to Ormond Beach (Florida) | 4,157.06 mi (6,690.14 km) |
| Douarnenez to Oro Valley (Arizona) | 5,269.18 mi (8,479.93 km) |
| Douarnenez to Oroville (California) | 5,269.00 mi (8,479.63 km) |
| Douarnenez to Oshkosh (Wisconsin) | 3,839.20 mi (6,178.60 km) |
| Douarnenez to Oskaloosa (Iowa) | 4,118.53 mi (6,628.13 km) |
