| Westerlo to Odessa (Texas) | 5,207.30 mi (8,380.34 km) |
| Westerlo to Ogden (Utah) | 5,015.76 mi (8,072.09 km) |
| Westerlo to Oildale (California) | 5,561.41 mi (8,950.23 km) |
| Westerlo to Ojus (Florida) | 4,636.63 mi (7,461.94 km) |
| Westerlo to Okemos (Michigan) | 3,992.54 mi (6,425.37 km) |
| Westerlo to Oklahoma City (Oklahoma) | 4,839.42 mi (7,788.29 km) |
| Westerlo to Okmulgee (Oklahoma) | 4,776.21 mi (7,686.57 km) |
| Westerlo to Olathe (Kansas) | 4,564.58 mi (7,345.98 km) |
| Westerlo to Old Jamestown (Missouri) | 4,398.94 mi (7,079.40 km) |
| Westerlo to Oldsmar (Florida) | 4,635.71 mi (7,460.45 km) |
| Westerlo to Olean (New York) | 3,791.06 mi (6,101.13 km) |
| Westerlo to Olive Branch (Mississippi) | 4,575.95 mi (7,364.28 km) |
| Westerlo to Olivehurst (California) | 5,418.82 mi (8,720.74 km) |
| Westerlo to Olney (Maryland) | 3,869.69 mi (6,227.66 km) |
| Westerlo to Olympia (Washington) | 4,983.24 mi (8,019.75 km) |
