| Omagh to Cloverly (Maryland) | 3,311.81 mi (5,329.84 km) |
| Omagh to Clovis (California) | 4,962.92 mi (7,987.04 km) |
| Omagh to Clovis (New Mexico) | 4,538.35 mi (7,303.77 km) |
| Omagh to Clute (Texas) | 4,536.53 mi (7,300.83 km) |
| Omagh to Coachella (California) | 5,027.49 mi (8,090.96 km) |
| Omagh to Coalinga (California) | 5,022.12 mi (8,082.33 km) |
| Omagh to Coamo (Puerto Rico) | 3,979.06 mi (6,403.68 km) |
| Omagh to Coatesville (Pennsylvania) | 3,224.47 mi (5,189.28 km) |
| Omagh to Cockeysville (Maryland) | 3,279.73 mi (5,278.22 km) |
| Omagh to Cocoa (Florida) | 3,995.83 mi (6,430.67 km) |
| Omagh to Cocoa Beach (Florida) | 3,992.81 mi (6,425.81 km) |
| Omagh to Coconut Creek (Florida) | 4,082.78 mi (6,570.61 km) |
| Omagh to Coeur d'Alene (Idaho) | 4,269.42 mi (6,870.96 km) |
| Omagh to Cohoes (New York) | 3,015.52 mi (4,853.00 km) |
| Omagh to Cold Springs (Nevada) | 4,808.93 mi (7,739.22 km) |
