| Omagh to Caguas (Puerto Rico) | 3,957.82 mi (6,369.49 km) |
| Omagh to Cahokia (Illinois) | 3,845.40 mi (6,188.58 km) |
| Omagh to Calabasas (California) | 5,084.40 mi (8,182.55 km) |
| Omagh to Caldwell (Idaho) | 4,487.36 mi (7,221.71 km) |
| Omagh to Caledonia (Wisconsin) | 3,554.40 mi (5,720.25 km) |
| Omagh to Calera (Alabama) | 3,987.41 mi (6,417.12 km) |
| Omagh to Calexico (California) | 5,062.82 mi (8,147.82 km) |
| Omagh to Calhoun (Georgia) | 3,847.73 mi (6,192.32 km) |
| Omagh to California (Maryland) | 3,330.23 mi (5,359.48 km) |
| Omagh to California City (California) | 5,000.65 mi (8,047.76 km) |
| Omagh to Callaway (Florida) | 4,094.77 mi (6,589.90 km) |
| Omagh to Calumet City (Illinois) | 3,598.46 mi (5,791.16 km) |
| Omagh to Calverton (Maryland) | 3,312.10 mi (5,330.32 km) |
| Omagh to Camano (Washington) | 4,401.16 mi (7,082.98 km) |
| Omagh to Camarillo (California) | 5,091.17 mi (8,193.44 km) |
