| Guardiagrele to Odessa (Texas) | 5,927.26 mi (9,539.00 km) |
| Guardiagrele to Ogden (Utah) | 5,767.07 mi (9,281.20 km) |
| Guardiagrele to Oildale (California) | 6,314.14 mi (10,161.62 km) |
| Guardiagrele to Ojus (Florida) | 5,246.02 mi (8,442.65 km) |
| Guardiagrele to Okemos (Michigan) | 4,701.38 mi (7,566.14 km) |
| Guardiagrele to Oklahoma City (Oklahoma) | 5,556.66 mi (8,942.58 km) |
| Guardiagrele to Okmulgee (Oklahoma) | 5,489.98 mi (8,835.27 km) |
| Guardiagrele to Olathe (Kansas) | 5,285.12 mi (8,505.59 km) |
| Guardiagrele to Old Jamestown (Missouri) | 5,108.22 mi (8,220.88 km) |
| Guardiagrele to Oldsmar (Florida) | 5,269.18 mi (8,479.92 km) |
| Guardiagrele to Olean (New York) | 4,481.65 mi (7,212.52 km) |
| Guardiagrele to Olive Branch (Mississippi) | 5,269.62 mi (8,480.63 km) |
| Guardiagrele to Olivehurst (California) | 6,173.40 mi (9,935.12 km) |
| Guardiagrele to Olney (Maryland) | 4,541.03 mi (7,308.09 km) |
| Guardiagrele to Olympia (Washington) | 5,735.37 mi (9,230.19 km) |
