| Heerlen to Ordu | 1,661.80 mi (2,674.41 km) |
| Heerlen to Ortahisar | 1,635.41 mi (2,631.93 km) |
| Heerlen to Ortakent | 1,414.77 mi (2,276.85 km) |
| Heerlen to Ortaklar | 1,382.15 mi (2,224.35 km) |
| Heerlen to Ortakoy | 1,596.40 mi (2,569.16 km) |
| Heerlen to Ortakoy | 1,579.75 mi (2,542.36 km) |
| Heerlen to Osmaneli | 1,361.19 mi (2,190.62 km) |
| Heerlen to Osmaniye | 1,762.80 mi (2,836.95 km) |
| Heerlen to Ozdere | 1,361.63 mi (2,191.33 km) |
| Heerlen to Palu | 1,843.89 mi (2,967.46 km) |
| Heerlen to Pamukkale | 1,440.98 mi (2,319.04 km) |
| Heerlen to Patnos | 1,945.98 mi (3,131.74 km) |
| Heerlen to Pazar | 1,624.55 mi (2,614.45 km) |
| Heerlen to Pazarcik | 1,786.74 mi (2,875.49 km) |
| Heerlen to Pazaryeri | 1,372.31 mi (2,208.52 km) |
