| Tallaght to Oakley (California) | 5,045.94 mi (8,120.66 km) |
| Tallaght to Oakton (Virginia) | 3,390.07 mi (5,455.80 km) |
| Tallaght to Oakville (Missouri) | 3,923.79 mi (6,314.74 km) |
| Tallaght to Oatfield (Oregon) | 4,652.12 mi (7,486.87 km) |
| Tallaght to Ocala (Florida) | 4,058.58 mi (6,531.65 km) |
| Tallaght to Ocean Acres (New Jersey) | 3,229.51 mi (5,197.40 km) |
| Tallaght to Ocean City (New Jersey) | 3,263.90 mi (5,252.74 km) |
| Tallaght to Ocean Pines (Maryland) | 3,326.23 mi (5,353.05 km) |
| Tallaght to Ocean Pointe (Hawaii) | 7,010.72 mi (11,282.67 km) |
| Tallaght to Ocean Springs (Mississippi) | 4,264.84 mi (6,863.59 km) |
| Tallaght to Oceanside (California) | 5,175.36 mi (8,328.94 km) |
| Tallaght to Oceanside (New York) | 3,163.91 mi (5,091.82 km) |
| Tallaght to Ocoee (Florida) | 4,063.72 mi (6,539.92 km) |
| Tallaght to Oconomowoc (Wisconsin) | 3,633.91 mi (5,848.22 km) |
| Tallaght to Odenton (Maryland) | 3,357.50 mi (5,403.37 km) |
