| Omagh to Carson (California) | 5,088.21 mi (8,188.68 km) |
| Omagh to Carson City (Nevada) | 4,832.67 mi (7,777.43 km) |
| Omagh to Carteret (New Jersey) | 3,134.31 mi (5,044.18 km) |
| Omagh to Cartersville (Georgia) | 3,858.81 mi (6,210.15 km) |
| Omagh to Carthage (Missouri) | 4,071.55 mi (6,552.53 km) |
| Omagh to Cary (Illinois) | 3,595.97 mi (5,787.15 km) |
| Omagh to Cary (North Carolina) | 3,543.34 mi (5,702.45 km) |
| Omagh to Casa de Oro-Mount Helix (California) | 5,107.29 mi (8,219.40 km) |
| Omagh to Casa Grande (Arizona) | 4,923.85 mi (7,924.17 km) |
| Omagh to Casas Adobes (Arizona) | 4,929.32 mi (7,932.98 km) |
| Omagh to Cascades (Virginia) | 3,329.85 mi (5,358.88 km) |
| Omagh to Casper (Wyoming) | 4,202.44 mi (6,763.17 km) |
| Omagh to Casselberry (Florida) | 4,003.32 mi (6,442.72 km) |
| Omagh to Castaic (California) | 5,063.54 mi (8,148.98 km) |
| Omagh to Castle Pines (Colorado) | 4,330.61 mi (6,969.44 km) |
