| Longmont to Opole | 5,279.76 mi (8,496.95 km) |
| Longmont to Orzesze | 5,330.29 mi (8,578.27 km) |
| Longmont to Osowa | 5,099.69 mi (8,207.16 km) |
| Longmont to Ostroda | 5,177.39 mi (8,332.21 km) |
| Longmont to Ostroleka | 5,253.20 mi (8,454.21 km) |
| Longmont to Ostrow Mazowiecka | 5,276.26 mi (8,491.32 km) |
| Longmont to Ostrow Wielkopolski | 5,225.44 mi (8,409.54 km) |
| Longmont to Ostrowiec Swietokrzyski | 5,363.18 mi (8,631.21 km) |
| Longmont to Ostrzeszow | 5,240.82 mi (8,434.29 km) |
| Longmont to Oswiecim | 5,349.73 mi (8,609.56 km) |
| Longmont to Otwock | 5,296.11 mi (8,523.27 km) |
| Longmont to Ozarow Mazowiecki | 5,278.22 mi (8,494.47 km) |
| Longmont to Ozimek | 5,287.49 mi (8,509.39 km) |
| Longmont to Ozorkow | 5,250.01 mi (8,449.08 km) |
| Longmont to Pabianice | 5,269.43 mi (8,480.33 km) |
