| Fort Collins to Orthez | 4,965.35 mi (7,990.95 km) |
| Fort Collins to Orvault | 4,770.38 mi (7,677.19 km) |
| Fort Collins to Osny | 4,826.42 mi (7,767.37 km) |
| Fort Collins to Ostwald | 5,043.21 mi (8,116.27 km) |
| Fort Collins to Ouistreham | 4,735.00 mi (7,620.25 km) |
| Fort Collins to Oullins | 5,074.24 mi (8,166.20 km) |
| Fort Collins to Outreau | 4,738.76 mi (7,626.29 km) |
| Fort Collins to Oyonnax | 5,079.47 mi (8,174.62 km) |
| Fort Collins to Ozoir-la-Ferriere | 4,860.41 mi (7,822.07 km) |
| Fort Collins to Pace | 4,727.95 mi (7,608.89 km) |
| Fort Collins to Palaiseau | 4,847.97 mi (7,802.06 km) |
| Fort Collins to Pamiers | 5,073.69 mi (8,165.31 km) |
| Fort Collins to Panazol | 4,940.99 mi (7,951.76 km) |
| Fort Collins to Pantin | 4,845.43 mi (7,797.97 km) |
| Fort Collins to Paray-le-Monial | 5,015.81 mi (8,072.16 km) |
