| Prospect Heights to LaGrange (Georgia) | 646.65 mi (1,040.69 km) |
| Prospect Heights to Laguna Beach (California) | 1,721.68 mi (2,770.77 km) |
| Prospect Heights to Laguna Hills (California) | 1,717.00 mi (2,763.24 km) |
| Prospect Heights to Laguna Niguel (California) | 1,719.44 mi (2,767.17 km) |
| Prospect Heights to Laguna Woods (California) | 1,717.95 mi (2,764.78 km) |
| Prospect Heights to Lahaina (Hawaii) | 4,189.24 mi (6,741.93 km) |
| Prospect Heights to Lake Arbor (Maryland) | 622.70 mi (1,002.14 km) |
| Prospect Heights to Lake Barcroft (Virginia) | 608.40 mi (979.13 km) |
| Prospect Heights to Lake Butler (Florida) | 1,006.57 mi (1,619.91 km) |
| Prospect Heights to Lake Charles (Louisiana) | 873.18 mi (1,405.24 km) |
| Prospect Heights to Lake City (Florida) | 873.80 mi (1,406.25 km) |
| Prospect Heights to Lake Elmo (Minnesota) | 319.25 mi (513.79 km) |
| Prospect Heights to Lake Elsinore (California) | 1,695.52 mi (2,728.67 km) |
| Prospect Heights to Lake Forest (California) | 1,713.32 mi (2,757.33 km) |
| Prospect Heights to Lake Forest (Illinois) | 9.88 mi (15.90 km) |
