| Guardiagrele to Oak Harbor (Washington) | 5,654.57 mi (9,100.15 km) |
| Guardiagrele to Oak Hills (Oregon) | 5,823.42 mi (9,371.89 km) |
| Guardiagrele to Oak Lawn (Illinois) | 4,877.47 mi (7,849.53 km) |
| Guardiagrele to Oak Park (California) | 6,378.34 mi (10,264.95 km) |
| Guardiagrele to Oak Park (Illinois) | 4,871.28 mi (7,839.56 km) |
| Guardiagrele to Oak Park (Michigan) | 4,661.89 mi (7,502.59 km) |
| Guardiagrele to Oak Ridge (Florida) | 5,192.28 mi (8,356.16 km) |
| Guardiagrele to Oak Ridge (New Jersey) | 4,354.98 mi (7,008.66 km) |
| Guardiagrele to Oak Ridge (Tennessee) | 4,988.31 mi (8,027.91 km) |
| Guardiagrele to Oakdale (California) | 6,231.18 mi (10,028.12 km) |
| Guardiagrele to Oakdale (Minnesota) | 4,928.46 mi (7,931.58 km) |
| Guardiagrele to Oakland (California) | 6,268.16 mi (10,087.63 km) |
| Guardiagrele to Oakland (New Jersey) | 4,343.91 mi (6,990.85 km) |
| Guardiagrele to Oakland Park (Florida) | 5,235.73 mi (8,426.09 km) |
| Guardiagrele to Oakleaf Plantation (Florida) | 5,135.83 mi (8,265.31 km) |
