| Fairmount to Oakley (California) | 2,382.98 mi (3,835.04 km) |
| Fairmount to Oakton (Virginia) | 292.13 mi (470.14 km) |
| Fairmount to Oakville (Missouri) | 800.75 mi (1,288.68 km) |
| Fairmount to Oatfield (Oregon) | 2,268.55 mi (3,650.89 km) |
| Fairmount to Ocala (Florida) | 1,012.25 mi (1,629.06 km) |
| Fairmount to Ocean Acres (New Jersey) | 249.67 mi (401.80 km) |
| Fairmount to Ocean City (New Jersey) | 274.40 mi (441.61 km) |
| Fairmount to Ocean Pines (Maryland) | 326.83 mi (525.97 km) |
| Fairmount to Ocean Pointe (Hawaii) | 4,822.15 mi (7,760.50 km) |
| Fairmount to Ocean Springs (Mississippi) | 1,112.69 mi (1,790.69 km) |
| Fairmount to Oceanside (California) | 2,306.82 mi (3,712.47 km) |
| Fairmount to Oceanside (New York) | 213.93 mi (344.28 km) |
| Fairmount to Ocoee (Florida) | 1,041.58 mi (1,676.26 km) |
| Fairmount to Oconomowoc (Wisconsin) | 617.58 mi (993.90 km) |
| Fairmount to Odenton (Maryland) | 275.64 mi (443.61 km) |
