| Fort Collins to Oschatz | 5,082.40 mi (8,179.33 km) |
| Fort Collins to Oschersleben | 4,991.12 mi (8,032.44 km) |
| Fort Collins to Osnabruck | 4,879.72 mi (7,853.15 km) |
| Fort Collins to Ostbevern | 4,884.64 mi (7,861.07 km) |
| Fort Collins to Osterburg | 4,969.61 mi (7,997.81 km) |
| Fort Collins to Ostercappeln | 4,882.35 mi (7,857.39 km) |
| Fort Collins to Osterhofen | 5,208.70 mi (8,382.59 km) |
| Fort Collins to Osterholz-Scharmbeck | 4,859.49 mi (7,820.60 km) |
| Fort Collins to Osternienburg | 5,024.90 mi (8,086.80 km) |
| Fort Collins to Osterode | 4,974.37 mi (8,005.47 km) |
| Fort Collins to Osterwieck | 4,977.26 mi (8,010.12 km) |
| Fort Collins to Ostfildern | 5,085.58 mi (8,184.46 km) |
| Fort Collins to Osthofen | 5,009.12 mi (8,061.40 km) |
| Fort Collins to Ostrhauderfehn | 4,827.74 mi (7,769.49 km) |
| Fort Collins to Ostringen | 5,044.72 mi (8,118.69 km) |
