| Cities | Distance |
|---|---|
| Heerlen to Oegstgeest | 110.98 mi (178.60 km) |
| Heerlen to Oirschot | 51.87 mi (83.48 km) |
| Heerlen to Oisterwijk | 59.05 mi (95.04 km) |
| Heerlen to Oldebroek | 108.31 mi (174.30 km) |
| Heerlen to Oldenzaal | 107.10 mi (172.36 km) |
| Heerlen to Ommen | 114.37 mi (184.06 km) |
| Heerlen to Oosterend | 146.54 mi (235.84 km) |
| Heerlen to Oosterhout | 71.61 mi (115.24 km) |
| Heerlen to Oosterwolde | 146.17 mi (235.24 km) |
| Heerlen to Oostzaan | 117.01 mi (188.31 km) |
| Heerlen to Opmeer | 133.06 mi (214.14 km) |
| Heerlen to Oss | 64.28 mi (103.44 km) |
| Heerlen to Oud-Beijerland | 93.95 mi (151.20 km) |
| Heerlen to Oudenbosch | 79.78 mi (128.39 km) |
| Heerlen to Oudewater | 91.89 mi (147.88 km) |