| Johnston to Carlsbad (California) | 1,415.95 mi (2,278.75 km) |
| Johnston to Carlsbad (New Mexico) | 863.68 mi (1,389.95 km) |
| Johnston to Carmel (Indiana) | 413.55 mi (665.55 km) |
| Johnston to Carmichael (California) | 1,466.35 mi (2,359.87 km) |
| Johnston to Carney (Maryland) | 915.12 mi (1,472.74 km) |
| Johnston to Carnot-Moon (Pennsylvania) | 707.04 mi (1,137.87 km) |
| Johnston to Carol Stream (Illinois) | 288.42 mi (464.17 km) |
| Johnston to Carolina (Puerto Rico) | 2,291.56 mi (3,687.91 km) |
| Johnston to Carolina Forest (South Carolina) | 975.01 mi (1,569.13 km) |
| Johnston to Carpentersville (Illinois) | 280.95 mi (452.15 km) |
| Johnston to Carpinteria (California) | 1,484.19 mi (2,388.58 km) |
| Johnston to Carrboro (North Carolina) | 881.32 mi (1,418.35 km) |
| Johnston to Carroll (Iowa) | 64.28 mi (103.45 km) |
| Johnston to Carrollton (Georgia) | 732.25 mi (1,178.44 km) |
| Johnston to Carrollton (Texas) | 625.93 mi (1,007.33 km) |
