| Alenquer to Oberriet | 1,092.51 mi (1,758.23 km) |
| Alenquer to Obersiggenthal | 1,044.22 mi (1,680.50 km) |
| Alenquer to Oberwil | 1,014.79 mi (1,633.15 km) |
| Alenquer to Oberwingert | 1,064.96 mi (1,713.90 km) |
| Alenquer to Oftringen | 1,023.21 mi (1,646.69 km) |
| Alenquer to Olten | 1,023.59 mi (1,647.31 km) |
| Alenquer to Onex | 910.72 mi (1,465.66 km) |
| Alenquer to Opfikon | 1,053.92 mi (1,696.13 km) |
| Alenquer to Ostermundigen | 993.84 mi (1,599.43 km) |
| Alenquer to Payerne | 966.15 mi (1,554.86 km) |
| Alenquer to Pfaffikon | 1,060.92 mi (1,707.39 km) |
| Alenquer to Plan-les-Ouates | 910.90 mi (1,465.96 km) |
| Alenquer to Pratteln | 1,020.84 mi (1,642.88 km) |
| Alenquer to Prilly | 943.04 mi (1,517.67 km) |
| Alenquer to Pully | 945.32 mi (1,521.34 km) |
