| Omagh to Corinth (Mississippi) | 3,963.34 mi (6,378.38 km) |
| Omagh to Corinth (Texas) | 4,381.74 mi (7,051.73 km) |
| Omagh to Cornelius (North Carolina) | 3,639.82 mi (5,857.73 km) |
| Omagh to Cornelius (Oregon) | 4,567.44 mi (7,350.58 km) |
| Omagh to Corning (New York) | 3,173.71 mi (5,107.60 km) |
| Omagh to Corona (California) | 5,064.40 mi (8,150.36 km) |
| Omagh to Coronado (California) | 5,119.25 mi (8,238.64 km) |
| Omagh to Corpus Christi (Texas) | 4,682.12 mi (7,535.15 km) |
| Omagh to Corsicana (Texas) | 4,415.02 mi (7,105.29 km) |
| Omagh to Cortland (New York) | 3,119.31 mi (5,020.04 km) |
| Omagh to Corvallis (Oregon) | 4,627.68 mi (7,447.54 km) |
| Omagh to Coshocton (Ohio) | 3,445.98 mi (5,545.77 km) |
| Omagh to Costa Mesa (California) | 5,086.84 mi (8,186.47 km) |
| Omagh to Coto de Caza (California) | 5,080.20 mi (8,175.80 km) |
| Omagh to Cottage Grove (Minnesota) | 3,642.53 mi (5,862.09 km) |
