| Omagh to Cicero (Illinois) | 3,595.25 mi (5,786.00 km) |
| Omagh to Cimarron Hills (Colorado) | 4,356.50 mi (7,011.11 km) |
| Omagh to Cincinnati (Ohio) | 3,601.62 mi (5,796.25 km) |
| Omagh to Cinco Ranch (Texas) | 4,512.40 mi (7,262.01 km) |
| Omagh to Circleville (Ohio) | 3,518.88 mi (5,663.09 km) |
| Omagh to Citrus (California) | 5,060.45 mi (8,144.00 km) |
| Omagh to Citrus Heights (California) | 4,905.46 mi (7,894.58 km) |
| Omagh to Citrus Park (Florida) | 4,083.52 mi (6,571.79 km) |
| Omagh to Claiborne (Louisiana) | 4,228.65 mi (6,805.36 km) |
| Omagh to Claremont (California) | 5,054.25 mi (8,134.03 km) |
| Omagh to Claremont (New Hampshire) | 2,935.47 mi (4,724.18 km) |
| Omagh to Claremore (Oklahoma) | 4,162.19 mi (6,698.40 km) |
| Omagh to Clarksburg (Maryland) | 3,316.70 mi (5,337.71 km) |
| Omagh to Clarksburg (West Virginia) | 3,433.15 mi (5,525.12 km) |
| Omagh to Clarksdale (Mississippi) | 4,080.73 mi (6,567.30 km) |
