| North Richland Hills to Octeville | 4,758.34 mi (7,657.81 km) |
| North Richland Hills to Oignies | 4,913.41 mi (7,907.37 km) |
| North Richland Hills to Oissel | 4,876.47 mi (7,847.91 km) |
| North Richland Hills to Olivet | 4,957.91 mi (7,978.99 km) |
| North Richland Hills to Ollioules | 5,289.67 mi (8,512.90 km) |
| North Richland Hills to Olonne-sur-Mer | 4,849.30 mi (7,804.20 km) |
| North Richland Hills to Oloron-Sainte-Marie | 5,008.52 mi (8,060.44 km) |
| North Richland Hills to Onet Village | 5,107.01 mi (8,218.94 km) |
| North Richland Hills to Onnaing | 4,939.36 mi (7,949.14 km) |
| North Richland Hills to Orange | 5,208.95 mi (8,382.99 km) |
| North Richland Hills to Orchies | 4,922.84 mi (7,922.55 km) |
| North Richland Hills to Orleans | 4,956.95 mi (7,977.44 km) |
| North Richland Hills to Orly | 4,948.01 mi (7,963.05 km) |
| North Richland Hills to Ormesson-sur-Marne | 4,952.37 mi (7,970.07 km) |
| North Richland Hills to Orsay | 4,941.38 mi (7,952.38 km) |
