| Norristown to Nyon | 3,942.06 mi (6,344.13 km) |
| Norristown to Oberriet | 4,054.71 mi (6,525.43 km) |
| Norristown to Obersiggenthal | 3,996.13 mi (6,431.15 km) |
| Norristown to Oberwil | 3,964.37 mi (6,380.04 km) |
| Norristown to Oberwingert | 4,015.18 mi (6,461.80 km) |
| Norristown to Oftringen | 3,985.54 mi (6,414.10 km) |
| Norristown to Olten | 3,983.82 mi (6,411.35 km) |
| Norristown to Onex | 3,942.31 mi (6,344.54 km) |
| Norristown to Opfikon | 4,009.28 mi (6,452.31 km) |
| Norristown to Ostermundigen | 3,978.45 mi (6,402.70 km) |
| Norristown to Payerne | 3,959.00 mi (6,371.39 km) |
| Norristown to Pfaffikon | 4,020.40 mi (6,470.20 km) |
| Norristown to Plan-les-Ouates | 3,943.53 mi (6,346.49 km) |
| Norristown to Pratteln | 3,970.38 mi (6,389.72 km) |
| Norristown to Prilly | 3,953.29 mi (6,362.20 km) |
