| North Richland Hills to Olivares | 4,940.40 mi (7,950.81 km) |
| North Richland Hills to Olivenza | 4,854.27 mi (7,812.19 km) |
| North Richland Hills to Olot | 5,179.63 mi (8,335.81 km) |
| North Richland Hills to Onate | 4,933.57 mi (7,939.81 km) |
| North Richland Hills to Onda | 5,133.84 mi (8,262.12 km) |
| North Richland Hills to Onteniente | 5,157.41 mi (8,300.05 km) |
| North Richland Hills to Orihuela | 5,167.01 mi (8,315.51 km) |
| North Richland Hills to Osuna | 4,997.30 mi (8,042.38 km) |
| North Richland Hills to Ourense | 4,707.67 mi (7,576.27 km) |
| North Richland Hills to Oviedo | 4,769.42 mi (7,675.64 km) |
| North Richland Hills to Paiporta | 5,145.21 mi (8,280.42 km) |
| North Richland Hills to Pajara | 4,818.76 mi (7,755.05 km) |
| North Richland Hills to Palafolls | 5,209.46 mi (8,383.82 km) |
| North Richland Hills to Palafrugell | 5,218.69 mi (8,398.68 km) |
| North Richland Hills to Palamos | 5,219.77 mi (8,400.41 km) |
