| Glen Carbon to Harrison (Wisconsin) | 385.56 mi (620.51 km) |
| Glen Carbon to Harrisonburg (Virginia) | 599.91 mi (965.47 km) |
| Glen Carbon to Hartford (Connecticut) | 933.72 mi (1,502.67 km) |
| Glen Carbon to Hartford (Wisconsin) | 326.23 mi (525.02 km) |
| Glen Carbon to Hartselle (Alabama) | 342.77 mi (551.64 km) |
| Glen Carbon to Hartsville (Tennessee) | 265.67 mi (427.55 km) |
| Glen Carbon to Harvey (Illinois) | 232.13 mi (373.58 km) |
| Glen Carbon to Harvey (Louisiana) | 612.90 mi (986.37 km) |
| Glen Carbon to Hasbrouck Heights (New Jersey) | 855.51 mi (1,376.81 km) |
| Glen Carbon to Haslett (Michigan) | 401.66 mi (646.41 km) |
| Glen Carbon to Hastings (Minnesota) | 438.41 mi (705.56 km) |
| Glen Carbon to Hastings (Nebraska) | 464.58 mi (747.67 km) |
| Glen Carbon to Hattiesburg (Mississippi) | 516.16 mi (830.67 km) |
| Glen Carbon to Hauppauge (New York) | 900.31 mi (1,448.91 km) |
| Glen Carbon to Havelock (North Carolina) | 770.02 mi (1,239.22 km) |
