| Guardiagrele to Octeville | 916.10 mi (1,474.32 km) |
| Guardiagrele to Oignies | 781.33 mi (1,257.42 km) |
| Guardiagrele to Oissel | 800.36 mi (1,288.06 km) |
| Guardiagrele to Olivet | 716.19 mi (1,152.60 km) |
| Guardiagrele to Ollioules | 429.94 mi (691.93 km) |
| Guardiagrele to Olonne-sur-Mer | 842.81 mi (1,356.38 km) |
| Guardiagrele to Oloron-Sainte-Marie | 754.86 mi (1,214.83 km) |
| Guardiagrele to Onet Village | 602.89 mi (970.25 km) |
| Guardiagrele to Onnaing | 758.13 mi (1,220.10 km) |
| Guardiagrele to Orange | 492.28 mi (792.24 km) |
| Guardiagrele to Orchies | 773.53 mi (1,244.88 km) |
| Guardiagrele to Orleans | 717.13 mi (1,154.11 km) |
| Guardiagrele to Orly | 728.41 mi (1,172.26 km) |
| Guardiagrele to Ormesson-sur-Marne | 724.56 mi (1,166.07 km) |
| Guardiagrele to Orsay | 734.46 mi (1,182.00 km) |
