| Fort Oglethorpe to Odessa (Texas) | 1,007.17 mi (1,620.88 km) |
| Fort Oglethorpe to Ogden (Utah) | 1,510.19 mi (2,430.41 km) |
| Fort Oglethorpe to Oildale (California) | 1,898.83 mi (3,055.87 km) |
| Fort Oglethorpe to Ojus (Florida) | 689.89 mi (1,110.27 km) |
| Fort Oglethorpe to Okemos (Michigan) | 538.98 mi (867.41 km) |
| Fort Oglethorpe to Oklahoma City (Oklahoma) | 693.16 mi (1,115.54 km) |
| Fort Oglethorpe to Okmulgee (Oklahoma) | 608.52 mi (979.32 km) |
| Fort Oglethorpe to Olathe (Kansas) | 594.80 mi (957.23 km) |
| Fort Oglethorpe to Old Jamestown (Missouri) | 387.73 mi (623.99 km) |
| Fort Oglethorpe to Oldsmar (Florida) | 499.02 mi (803.10 km) |
| Fort Oglethorpe to Olean (New York) | 615.80 mi (991.04 km) |
| Fort Oglethorpe to Olive Branch (Mississippi) | 260.56 mi (419.33 km) |
| Fort Oglethorpe to Olivehurst (California) | 2,010.38 mi (3,235.39 km) |
| Fort Oglethorpe to Olney (Maryland) | 536.36 mi (863.19 km) |
| Fort Oglethorpe to Olympia (Washington) | 2,109.10 mi (3,394.26 km) |
