| Westerlo to Oakley (California) | 5,487.06 mi (8,830.56 km) |
| Westerlo to Oakton (Virginia) | 3,890.74 mi (6,261.54 km) |
| Westerlo to Oakville (Missouri) | 4,419.65 mi (7,112.74 km) |
| Westerlo to Oatfield (Oregon) | 5,071.83 mi (8,162.32 km) |
| Westerlo to Ocala (Florida) | 4,557.37 mi (7,334.38 km) |
| Westerlo to Ocean Acres (New Jersey) | 3,730.07 mi (6,002.97 km) |
| Westerlo to Ocean City (New Jersey) | 3,764.41 mi (6,058.23 km) |
| Westerlo to Ocean Pines (Maryland) | 3,826.61 mi (6,158.34 km) |
| Westerlo to Ocean Pointe (Hawaii) | 7,328.15 mi (11,793.52 km) |
| Westerlo to Ocean Springs (Mississippi) | 4,765.47 mi (7,669.28 km) |
| Westerlo to Oceanside (California) | 5,637.95 mi (9,073.41 km) |
| Westerlo to Oceanside (New York) | 3,664.54 mi (5,897.50 km) |
| Westerlo to Ocoee (Florida) | 4,561.76 mi (7,341.45 km) |
| Westerlo to Oconomowoc (Wisconsin) | 4,125.78 mi (6,639.80 km) |
| Westerlo to Odenton (Maryland) | 3,858.16 mi (6,209.11 km) |
