| Genappe to Olympia Heights (Florida) | 4,643.86 mi (7,473.57 km) |
| Genappe to Omaha (Nebraska) | 4,490.90 mi (7,227.41 km) |
| Genappe to On Top of the World Designated Place (Florida) | 4,557.08 mi (7,333.92 km) |
| Genappe to Onalaska (Wisconsin) | 4,188.41 mi (6,740.59 km) |
| Genappe to Oneida (New York) | 3,634.31 mi (5,848.86 km) |
| Genappe to Oneonta (New York) | 3,637.11 mi (5,853.36 km) |
| Genappe to Ontario (California) | 5,608.78 mi (9,026.46 km) |
| Genappe to Ontario (Oregon) | 5,016.02 mi (8,072.50 km) |
| Genappe to Opa-locka (Florida) | 4,631.45 mi (7,453.61 km) |
| Genappe to Opelika (Alabama) | 4,508.44 mi (7,255.64 km) |
| Genappe to Opelousas (Louisiana) | 4,885.84 mi (7,863.00 km) |
| Genappe to Orange (California) | 5,629.15 mi (9,059.24 km) |
| Genappe to Orange (Texas) | 4,973.16 mi (8,003.53 km) |
| Genappe to Orange City (Florida) | 4,523.66 mi (7,280.13 km) |
| Genappe to Orangeburg (South Carolina) | 4,283.05 mi (6,892.91 km) |
