| Douarnenez to Odessa (Texas) | 4,954.05 mi (7,972.78 km) |
| Douarnenez to Ogden (Utah) | 4,852.31 mi (7,809.05 km) |
| Douarnenez to Oildale (California) | 5,405.12 mi (8,698.70 km) |
| Douarnenez to Ojus (Florida) | 4,269.08 mi (6,870.42 km) |
| Douarnenez to Okemos (Michigan) | 3,723.70 mi (5,992.71 km) |
| Douarnenez to Oklahoma City (Oklahoma) | 4,582.30 mi (7,374.50 km) |
| Douarnenez to Okmulgee (Oklahoma) | 4,513.47 mi (7,263.72 km) |
| Douarnenez to Olathe (Kansas) | 4,313.95 mi (6,942.63 km) |
| Douarnenez to Old Jamestown (Missouri) | 4,129.88 mi (6,646.40 km) |
| Douarnenez to Oldsmar (Florida) | 4,285.40 mi (6,896.69 km) |
| Douarnenez to Olean (New York) | 3,496.96 mi (5,627.82 km) |
| Douarnenez to Olive Branch (Mississippi) | 4,284.81 mi (6,895.74 km) |
| Douarnenez to Olivehurst (California) | 5,291.77 mi (8,516.28 km) |
| Douarnenez to Olney (Maryland) | 3,553.23 mi (5,718.38 km) |
| Douarnenez to Olympia (Washington) | 4,899.59 mi (7,885.12 km) |
