| Helensburgh to Nyon | 815.49 mi (1,312.41 km) |
| Helensburgh to Oberriet | 855.27 mi (1,376.43 km) |
| Helensburgh to Obersiggenthal | 808.44 mi (1,301.05 km) |
| Helensburgh to Oberwil | 785.90 mi (1,264.79 km) |
| Helensburgh to Oberwingert | 820.79 mi (1,320.93 km) |
| Helensburgh to Oftringen | 806.97 mi (1,298.69 km) |
| Helensburgh to Olten | 804.66 mi (1,294.98 km) |
| Helensburgh to Onex | 824.07 mi (1,326.22 km) |
| Helensburgh to Opfikon | 819.33 mi (1,318.58 km) |
| Helensburgh to Ostermundigen | 815.23 mi (1,311.98 km) |
| Helensburgh to Payerne | 808.17 mi (1,300.62 km) |
| Helensburgh to Pfaffikon | 829.27 mi (1,334.57 km) |
| Helensburgh to Plan-les-Ouates | 825.47 mi (1,328.46 km) |
| Helensburgh to Pratteln | 789.83 mi (1,271.11 km) |
| Helensburgh to Prilly | 815.91 mi (1,313.09 km) |
