| Philadelphia to Nyon | 3,937.82 mi (6,337.31 km) |
| Philadelphia to Oberriet | 4,050.96 mi (6,519.39 km) |
| Philadelphia to Obersiggenthal | 3,992.32 mi (6,425.02 km) |
| Philadelphia to Oberwil | 3,960.51 mi (6,373.82 km) |
| Philadelphia to Oberwingert | 4,011.41 mi (6,455.74 km) |
| Philadelphia to Oftringen | 3,981.66 mi (6,407.85 km) |
| Philadelphia to Olten | 3,979.95 mi (6,405.11 km) |
| Philadelphia to Onex | 3,938.01 mi (6,337.62 km) |
| Philadelphia to Opfikon | 4,005.48 mi (6,446.19 km) |
| Philadelphia to Ostermundigen | 3,974.45 mi (6,396.26 km) |
| Philadelphia to Payerne | 3,954.92 mi (6,364.83 km) |
| Philadelphia to Pfaffikon | 4,016.60 mi (6,464.09 km) |
| Philadelphia to Plan-les-Ouates | 3,939.23 mi (6,339.58 km) |
| Philadelphia to Pratteln | 3,966.53 mi (6,383.52 km) |
| Philadelphia to Prilly | 3,949.11 mi (6,355.48 km) |
