| Westbrook to Nyon | 3,591.99 mi (5,780.75 km) |
| Westbrook to Oberriet | 3,702.41 mi (5,958.46 km) |
| Westbrook to Obersiggenthal | 3,644.09 mi (5,864.60 km) |
| Westbrook to Oberwil | 3,612.55 mi (5,813.83 km) |
| Westbrook to Oberwingert | 3,662.95 mi (5,894.94 km) |
| Westbrook to Oftringen | 3,633.79 mi (5,848.02 km) |
| Westbrook to Olten | 3,632.05 mi (5,845.22 km) |
| Westbrook to Onex | 3,592.55 mi (5,781.65 km) |
| Westbrook to Opfikon | 3,657.19 mi (5,885.69 km) |
| Westbrook to Ostermundigen | 3,627.23 mi (5,837.47 km) |
| Westbrook to Payerne | 3,608.15 mi (5,806.75 km) |
| Westbrook to Pfaffikon | 3,668.31 mi (5,903.57 km) |
| Westbrook to Plan-les-Ouates | 3,593.78 mi (5,783.63 km) |
| Westbrook to Pratteln | 3,618.51 mi (5,823.43 km) |
| Westbrook to Prilly | 3,602.89 mi (5,798.29 km) |
