| Festus to Oakley (California) | 1,692.79 mi (2,724.29 km) |
| Festus to Oakton (Virginia) | 709.16 mi (1,141.28 km) |
| Festus to Oakville (Missouri) | 16.52 mi (26.59 km) |
| Festus to Oatfield (Oregon) | 1,717.24 mi (2,763.63 km) |
| Festus to Ocala (Florida) | 783.84 mi (1,261.47 km) |
| Festus to Ocean Acres (New Jersey) | 871.47 mi (1,402.49 km) |
| Festus to Ocean City (New Jersey) | 853.85 mi (1,374.14 km) |
| Festus to Ocean Pines (Maryland) | 826.60 mi (1,330.29 km) |
| Festus to Ocean Pointe (Hawaii) | 4,129.30 mi (6,645.46 km) |
| Festus to Ocean Springs (Mississippi) | 547.57 mi (881.23 km) |
| Festus to Oceanside (California) | 1,541.95 mi (2,481.53 km) |
| Festus to Oceanside (New York) | 909.13 mi (1,463.10 km) |
| Festus to Ocoee (Florida) | 839.16 mi (1,350.50 km) |
| Festus to Oconomowoc (Wisconsin) | 351.78 mi (566.14 km) |
| Festus to Odenton (Maryland) | 741.79 mi (1,193.79 km) |
