| Omagh to Oak Harbor (Washington) | 4,399.37 mi (7,080.10 km) |
| Omagh to Oak Hills (Oregon) | 4,560.41 mi (7,339.27 km) |
| Omagh to Oak Lawn (Illinois) | 3,601.23 mi (5,795.62 km) |
| Omagh to Oak Park (California) | 5,084.83 mi (8,183.25 km) |
| Omagh to Oak Park (Illinois) | 3,594.36 mi (5,784.56 km) |
| Omagh to Oak Park (Michigan) | 3,394.05 mi (5,462.20 km) |
| Omagh to Oak Ridge (Florida) | 4,017.00 mi (6,464.74 km) |
| Omagh to Oak Ridge (New Jersey) | 3,124.44 mi (5,028.31 km) |
| Omagh to Oak Ridge (Tennessee) | 3,748.98 mi (6,033.41 km) |
| Omagh to Oakdale (California) | 4,945.47 mi (7,958.97 km) |
| Omagh to Oakdale (Minnesota) | 3,635.70 mi (5,851.09 km) |
| Omagh to Oakland (California) | 4,985.42 mi (8,023.26 km) |
| Omagh to Oakland (New Jersey) | 3,114.43 mi (5,012.20 km) |
| Omagh to Oakland Park (Florida) | 4,086.93 mi (6,577.28 km) |
| Omagh to Oakleaf Plantation (Florida) | 3,945.61 mi (6,349.84 km) |
