| Hertford to Nyon | 470.19 mi (756.70 km) |
| Hertford to Oberriet | 530.95 mi (854.49 km) |
| Hertford to Obersiggenthal | 477.92 mi (769.14 km) |
| Hertford to Oberwil | 451.37 mi (726.41 km) |
| Hertford to Oberwingert | 493.40 mi (794.05 km) |
| Hertford to Oftringen | 473.00 mi (761.23 km) |
| Hertford to Olten | 470.85 mi (757.76 km) |
| Hertford to Onex | 478.02 mi (769.31 km) |
| Hertford to Opfikon | 490.00 mi (788.57 km) |
| Hertford to Ostermundigen | 476.79 mi (767.32 km) |
| Hertford to Payerne | 466.63 mi (750.98 km) |
| Hertford to Pfaffikon | 500.66 mi (805.73 km) |
| Hertford to Plan-les-Ouates | 479.42 mi (771.55 km) |
| Hertford to Pratteln | 456.14 mi (734.09 km) |
| Hertford to Prilly | 472.10 mi (759.77 km) |
