| Heerlen to Oberriet | 294.90 mi (474.59 km) |
| Heerlen to Obersiggenthal | 256.76 mi (413.21 km) |
| Heerlen to Oberwil | 243.38 mi (391.69 km) |
| Heerlen to Oberwingert | 264.37 mi (425.46 km) |
| Heerlen to Oftringen | 261.47 mi (420.79 km) |
| Heerlen to Olten | 259.03 mi (416.88 km) |
| Heerlen to Onex | 324.78 mi (522.69 km) |
| Heerlen to Opfikon | 265.38 mi (427.08 km) |
| Heerlen to Ostermundigen | 279.88 mi (450.43 km) |
| Heerlen to Payerne | 284.27 mi (457.49 km) |
| Heerlen to Pfaffikon | 273.93 mi (440.85 km) |
| Heerlen to Plan-les-Ouates | 325.94 mi (524.55 km) |
| Heerlen to Pratteln | 245.16 mi (394.55 km) |
| Heerlen to Prilly | 301.87 mi (485.81 km) |
| Heerlen to Pully | 303.30 mi (488.12 km) |
