| Irondale to Nuth | 4,565.07 mi (7,346.76 km) |
| Irondale to Oegstgeest | 4,474.23 mi (7,200.58 km) |
| Irondale to Oirschot | 4,525.58 mi (7,283.22 km) |
| Irondale to Oisterwijk | 4,519.34 mi (7,273.17 km) |
| Irondale to Oldebroek | 4,522.53 mi (7,278.31 km) |
| Irondale to Oldenzaal | 4,566.07 mi (7,348.38 km) |
| Irondale to Ommen | 4,540.54 mi (7,307.30 km) |
| Irondale to Oosterend | 4,513.54 mi (7,263.85 km) |
| Irondale to Oosterhout | 4,504.19 mi (7,248.79 km) |
| Irondale to Oosterwolde | 4,522.48 mi (7,278.23 km) |
| Irondale to Oostzaan | 4,483.69 mi (7,215.81 km) |
| Irondale to Opmeer | 4,479.06 mi (7,208.36 km) |
| Irondale to Oss | 4,526.67 mi (7,284.97 km) |
| Irondale to Oud-Beijerland | 4,481.49 mi (7,212.27 km) |
| Irondale to Oudenbosch | 4,492.54 mi (7,230.04 km) |
