| Prospect Heights to Owosso (Michigan) | 200.58 mi (322.81 km) |
| Prospect Heights to Oxford (Alabama) | 598.36 mi (962.97 km) |
| Prospect Heights to Oxford (Mississippi) | 541.90 mi (872.10 km) |
| Prospect Heights to Oxford (Ohio) | 244.73 mi (393.86 km) |
| Prospect Heights to Oxnard (California) | 1,772.48 mi (2,852.52 km) |
| Prospect Heights to Oxon Hill (Maryland) | 619.28 mi (996.63 km) |
| Prospect Heights to Ozark (Alabama) | 746.71 mi (1,201.71 km) |
| Prospect Heights to Ozark (Missouri) | 449.18 mi (722.88 km) |
| Prospect Heights to Pace (Florida) | 794.66 mi (1,278.88 km) |
| Prospect Heights to Pacific Grove (California) | 1,842.60 mi (2,965.39 km) |
| Prospect Heights to Pacifica (California) | 1,845.76 mi (2,970.47 km) |
| Prospect Heights to Paducah (Kentucky) | 349.82 mi (562.98 km) |
| Prospect Heights to Pahrump (Nevada) | 1,549.92 mi (2,494.35 km) |
| Prospect Heights to Painesville (Ohio) | 344.02 mi (553.64 km) |
| Prospect Heights to Palatine (Illinois) | 6.04 mi (9.72 km) |
