| Omagh to Oakley (California) | 4,958.02 mi (7,979.17 km) |
| Omagh to Oakton (Virginia) | 3,333.93 mi (5,365.44 km) |
| Omagh to Oakville (Missouri) | 3,856.51 mi (6,206.45 km) |
| Omagh to Oatfield (Oregon) | 4,560.79 mi (7,339.89 km) |
| Omagh to Ocala (Florida) | 4,009.53 mi (6,452.71 km) |
| Omagh to Ocean Acres (New Jersey) | 3,175.12 mi (5,109.87 km) |
| Omagh to Ocean City (New Jersey) | 3,209.88 mi (5,165.81 km) |
| Omagh to Ocean Pines (Maryland) | 3,272.93 mi (5,267.28 km) |
| Omagh to Ocean Pointe (Hawaii) | 6,913.41 mi (11,126.05 km) |
| Omagh to Ocean Springs (Mississippi) | 4,207.36 mi (6,771.09 km) |
| Omagh to Oceanside (California) | 5,092.25 mi (8,195.19 km) |
| Omagh to Oceanside (New York) | 3,108.83 mi (5,003.18 km) |
| Omagh to Ocoee (Florida) | 4,016.06 mi (6,463.23 km) |
| Omagh to Oconomowoc (Wisconsin) | 3,563.07 mi (5,734.21 km) |
| Omagh to Odenton (Maryland) | 3,301.70 mi (5,313.57 km) |
