| Webster Groves to Nyon | 4,633.78 mi (7,457.35 km) |
| Webster Groves to Oberriet | 4,729.98 mi (7,612.17 km) |
| Webster Groves to Obersiggenthal | 4,673.88 mi (7,521.88 km) |
| Webster Groves to Oberwil | 4,644.04 mi (7,473.85 km) |
| Webster Groves to Oberwingert | 4,691.30 mi (7,549.92 km) |
| Webster Groves to Oftringen | 4,665.64 mi (7,508.62 km) |
| Webster Groves to Olten | 4,663.73 mi (7,505.54 km) |
| Webster Groves to Onex | 4,635.85 mi (7,460.67 km) |
| Webster Groves to Opfikon | 4,686.62 mi (7,542.39 km) |
| Webster Groves to Ostermundigen | 4,662.47 mi (7,503.51 km) |
| Webster Groves to Payerne | 4,645.61 mi (7,476.39 km) |
| Webster Groves to Pfaffikon | 4,697.61 mi (7,560.07 km) |
| Webster Groves to Plan-les-Ouates | 4,637.14 mi (7,462.75 km) |
| Webster Groves to Pratteln | 4,649.61 mi (7,482.83 km) |
| Webster Groves to Prilly | 4,642.90 mi (7,472.03 km) |
