| Omagh to Castle Rock (Colorado) | 4,334.56 mi (6,975.80 km) |
| Omagh to Castro Valley (California) | 4,985.47 mi (8,023.34 km) |
| Omagh to Catalina Foothills (Arizona) | 4,926.99 mi (7,929.23 km) |
| Omagh to Cataño (Puerto Rico) | 3,950.41 mi (6,357.57 km) |
| Omagh to Cathedral City (California) | 5,029.82 mi (8,094.72 km) |
| Omagh to Catonsville (Maryland) | 3,294.28 mi (5,301.63 km) |
| Omagh to Cave Spring (Virginia) | 3,519.68 mi (5,664.38 km) |
| Omagh to Cayce (South Carolina) | 3,722.15 mi (5,990.22 km) |
| Omagh to Cayey (Puerto Rico) | 3,969.15 mi (6,387.72 km) |
| Omagh to Cedar City (Utah) | 4,703.81 mi (7,570.06 km) |
| Omagh to Cedar Falls (Iowa) | 3,735.69 mi (6,012.01 km) |
| Omagh to Cedar Hill (Texas) | 4,407.28 mi (7,092.83 km) |
| Omagh to Cedar Lake (Indiana) | 3,605.92 mi (5,803.16 km) |
| Omagh to Cedar Mill (Oregon) | 4,559.56 mi (7,337.91 km) |
| Omagh to Cedar Park (Texas) | 4,549.60 mi (7,321.88 km) |
