| Fort Collins to Nyon | 5,093.93 mi (8,197.89 km) |
| Fort Collins to Oberriet | 5,164.15 mi (8,310.89 km) |
| Fort Collins to Obersiggenthal | 5,113.03 mi (8,228.62 km) |
| Fort Collins to Oberwil | 5,086.69 mi (8,186.24 km) |
| Fort Collins to Oberwingert | 5,127.71 mi (8,252.25 km) |
| Fort Collins to Oftringen | 5,108.34 mi (8,221.08 km) |
| Fort Collins to Olten | 5,106.20 mi (8,217.63 km) |
| Fort Collins to Onex | 5,098.57 mi (8,205.35 km) |
| Fort Collins to Opfikon | 5,124.87 mi (8,247.69 km) |
| Fort Collins to Ostermundigen | 5,110.81 mi (8,225.05 km) |
| Fort Collins to Payerne | 5,098.10 mi (8,204.59 km) |
| Fort Collins to Pfaffikon | 5,135.38 mi (8,264.59 km) |
| Fort Collins to Plan-les-Ouates | 5,099.93 mi (8,207.55 km) |
| Fort Collins to Pratteln | 5,091.50 mi (8,193.97 km) |
| Fort Collins to Prilly | 5,099.78 mi (8,207.30 km) |
