| Guardiagrele to Oakley (California) | 6,241.57 mi (10,044.83 km) |
| Guardiagrele to Oakton (Virginia) | 4,561.47 mi (7,340.97 km) |
| Guardiagrele to Oakville (Missouri) | 5,127.65 mi (8,252.16 km) |
| Guardiagrele to Oatfield (Oregon) | 5,824.95 mi (9,374.35 km) |
| Guardiagrele to Ocala (Florida) | 5,194.60 mi (8,359.90 km) |
| Guardiagrele to Ocean Acres (New Jersey) | 4,395.37 mi (7,073.67 km) |
| Guardiagrele to Ocean City (New Jersey) | 4,428.06 mi (7,126.27 km) |
| Guardiagrele to Ocean Pines (Maryland) | 4,487.07 mi (7,221.24 km) |
| Guardiagrele to Ocean Pointe (Hawaii) | 8,020.50 mi (12,907.75 km) |
| Guardiagrele to Ocean Springs (Mississippi) | 5,436.44 mi (8,749.10 km) |
| Guardiagrele to Oceanside (California) | 6,387.80 mi (10,280.17 km) |
| Guardiagrele to Oceanside (New York) | 4,332.86 mi (6,973.06 km) |
| Guardiagrele to Ocoee (Florida) | 5,192.88 mi (8,357.14 km) |
| Guardiagrele to Oconomowoc (Wisconsin) | 4,845.28 mi (7,797.73 km) |
| Guardiagrele to Odenton (Maryland) | 4,527.80 mi (7,286.79 km) |
