| Dallas to Octeville | 4,743.55 mi (7,634.01 km) |
| Dallas to Oignies | 4,899.50 mi (7,884.98 km) |
| Dallas to Oissel | 4,861.90 mi (7,824.47 km) |
| Dallas to Olivet | 4,942.92 mi (7,954.86 km) |
| Dallas to Ollioules | 5,273.64 mi (8,487.11 km) |
| Dallas to Olonne-sur-Mer | 4,833.38 mi (7,778.57 km) |
| Dallas to Oloron-Sainte-Marie | 4,991.60 mi (8,033.21 km) |
| Dallas to Onet Village | 5,090.91 mi (8,193.03 km) |
| Dallas to Onnaing | 4,925.50 mi (7,926.83 km) |
| Dallas to Orange | 5,193.09 mi (8,357.47 km) |
| Dallas to Orchies | 4,908.97 mi (7,900.22 km) |
| Dallas to Orleans | 4,941.98 mi (7,953.34 km) |
| Dallas to Orly | 4,933.39 mi (7,939.53 km) |
| Dallas to Ormesson-sur-Marne | 4,937.79 mi (7,946.61 km) |
| Dallas to Orsay | 4,926.72 mi (7,928.79 km) |
