| Herstal to Odessa (Texas) | 5,249.22 mi (8,447.80 km) |
| Herstal to Ogden (Utah) | 5,058.19 mi (8,140.37 km) |
| Herstal to Oildale (California) | 5,603.77 mi (9,018.40 km) |
| Herstal to Ojus (Florida) | 4,673.85 mi (7,521.84 km) |
| Herstal to Okemos (Michigan) | 4,033.99 mi (6,492.08 km) |
| Herstal to Oklahoma City (Oklahoma) | 4,881.23 mi (7,855.58 km) |
| Herstal to Okmulgee (Oklahoma) | 4,817.90 mi (7,753.67 km) |
| Herstal to Olathe (Kansas) | 4,606.48 mi (7,413.42 km) |
| Herstal to Old Jamestown (Missouri) | 4,440.44 mi (7,146.20 km) |
| Herstal to Oldsmar (Florida) | 4,674.05 mi (7,522.15 km) |
| Herstal to Olean (New York) | 3,831.76 mi (6,166.62 km) |
| Herstal to Olive Branch (Mississippi) | 4,616.88 mi (7,430.15 km) |
| Herstal to Olivehurst (California) | 5,460.88 mi (8,788.44 km) |
| Herstal to Olney (Maryland) | 3,909.57 mi (6,291.84 km) |
| Herstal to Olympia (Washington) | 5,024.60 mi (8,086.32 km) |
