| North Richland Hills to Oerlinghausen | 5,071.30 mi (8,161.47 km) |
| North Richland Hills to Oestrich-Winkel | 5,119.97 mi (8,239.79 km) |
| North Richland Hills to Offenburg | 5,174.71 mi (8,327.89 km) |
| North Richland Hills to Oftersheim | 5,165.51 mi (8,313.09 km) |
| North Richland Hills to Ohrdruf | 5,188.95 mi (8,350.80 km) |
| North Richland Hills to Ohringen | 5,206.43 mi (8,378.94 km) |
| North Richland Hills to Olbernhau | 5,288.35 mi (8,510.78 km) |
| North Richland Hills to Olching | 5,313.83 mi (8,551.78 km) |
| North Richland Hills to Oldenburg | 5,011.83 mi (8,065.77 km) |
| North Richland Hills to Oldenburg in Holstein | 5,060.51 mi (8,144.10 km) |
| North Richland Hills to Olfen | 5,034.09 mi (8,101.58 km) |
| North Richland Hills to Olpe | 5,076.16 mi (8,169.29 km) |
| North Richland Hills to Olsberg | 5,087.60 mi (8,187.70 km) |
| North Richland Hills to Oranienburg | 5,200.66 mi (8,369.65 km) |
| North Richland Hills to Ortenberg | 5,145.84 mi (8,281.43 km) |
