| Danbury to Nyon | 3,811.28 mi (6,133.67 km) |
| Danbury to Oberriet | 3,923.40 mi (6,314.10 km) |
| Danbury to Obersiggenthal | 3,864.88 mi (6,219.92 km) |
| Danbury to Oberwil | 3,833.17 mi (6,168.88 km) |
| Danbury to Oberwingert | 3,883.88 mi (6,250.50 km) |
| Danbury to Oftringen | 3,854.35 mi (6,202.98 km) |
| Danbury to Olten | 3,852.63 mi (6,200.21 km) |
| Danbury to Onex | 3,811.62 mi (6,134.20 km) |
| Danbury to Opfikon | 3,878.01 mi (6,241.06 km) |
| Danbury to Ostermundigen | 3,847.39 mi (6,191.78 km) |
| Danbury to Payerne | 3,828.03 mi (6,160.62 km) |
| Danbury to Pfaffikon | 3,889.13 mi (6,258.95 km) |
| Danbury to Plan-les-Ouates | 3,812.84 mi (6,136.17 km) |
| Danbury to Pratteln | 3,839.17 mi (6,178.55 km) |
| Danbury to Prilly | 3,822.43 mi (6,151.61 km) |
