| Santo Tirso to Oberriet | 979.49 mi (1,576.34 km) |
| Santo Tirso to Obersiggenthal | 927.37 mi (1,492.46 km) |
| Santo Tirso to Oberwil | 896.10 mi (1,442.14 km) |
| Santo Tirso to Oberwingert | 948.92 mi (1,527.14 km) |
| Santo Tirso to Oftringen | 906.76 mi (1,459.28 km) |
| Santo Tirso to Olten | 906.86 mi (1,459.45 km) |
| Santo Tirso to Onex | 798.86 mi (1,285.64 km) |
| Santo Tirso to Opfikon | 938.05 mi (1,509.65 km) |
| Santo Tirso to Ostermundigen | 879.12 mi (1,414.80 km) |
| Santo Tirso to Payerne | 851.17 mi (1,369.83 km) |
| Santo Tirso to Pfaffikon | 945.98 mi (1,522.40 km) |
| Santo Tirso to Plan-les-Ouates | 799.23 mi (1,286.23 km) |
| Santo Tirso to Pratteln | 902.46 mi (1,452.37 km) |
| Santo Tirso to Prilly | 829.51 mi (1,334.96 km) |
| Santo Tirso to Pully | 832.09 mi (1,339.12 km) |
