| Omagh to Orangevale (California) | 4,903.82 mi (7,891.94 km) |
| Omagh to Orchards (Washington) | 4,543.39 mi (7,311.88 km) |
| Omagh to Orcutt (California) | 5,098.25 mi (8,204.84 km) |
| Omagh to Oregon (Ohio) | 3,441.30 mi (5,538.24 km) |
| Omagh to Oregon (Wisconsin) | 3,604.25 mi (5,800.48 km) |
| Omagh to Oregon City (Oregon) | 4,564.75 mi (7,346.26 km) |
| Omagh to Orem (Utah) | 4,514.88 mi (7,265.99 km) |
| Omagh to Orinda (California) | 4,979.08 mi (8,013.05 km) |
| Omagh to Orland Park (Illinois) | 3,610.38 mi (5,810.34 km) |
| Omagh to Orlando (Florida) | 4,013.57 mi (6,459.22 km) |
| Omagh to Ormond Beach (Florida) | 3,961.49 mi (6,375.41 km) |
| Omagh to Oro Valley (Arizona) | 4,923.76 mi (7,924.03 km) |
| Omagh to Oroville (California) | 4,867.66 mi (7,833.74 km) |
| Omagh to Oshkosh (Wisconsin) | 3,522.23 mi (5,668.48 km) |
| Omagh to Oskaloosa (Iowa) | 3,802.31 mi (6,119.22 km) |
