| Barreiro to Oberriet | 1,110.95 mi (1,787.91 km) |
| Barreiro to Obersiggenthal | 1,063.32 mi (1,711.24 km) |
| Barreiro to Oberwil | 1,034.22 mi (1,664.42 km) |
| Barreiro to Oberwingert | 1,083.92 mi (1,744.39 km) |
| Barreiro to Oftringen | 1,042.27 mi (1,677.37 km) |
| Barreiro to Olten | 1,042.70 mi (1,678.06 km) |
| Barreiro to Onex | 929.23 mi (1,495.45 km) |
| Barreiro to Opfikon | 1,072.86 mi (1,726.60 km) |
| Barreiro to Ostermundigen | 1,012.67 mi (1,629.74 km) |
| Barreiro to Payerne | 985.05 mi (1,585.29 km) |
| Barreiro to Pfaffikon | 1,079.70 mi (1,737.61 km) |
| Barreiro to Plan-les-Ouates | 929.38 mi (1,495.70 km) |
| Barreiro to Pratteln | 1,040.21 mi (1,674.05 km) |
| Barreiro to Prilly | 961.75 mi (1,547.79 km) |
| Barreiro to Pully | 963.98 mi (1,551.38 km) |
