| Tucson to Nuth | 5,531.00 mi (8,901.29 km) |
| Tucson to Oegstgeest | 5,428.49 mi (8,736.31 km) |
| Tucson to Oirschot | 5,485.85 mi (8,828.63 km) |
| Tucson to Oisterwijk | 5,478.88 mi (8,817.40 km) |
| Tucson to Oldebroek | 5,463.78 mi (8,793.10 km) |
| Tucson to Oldenzaal | 5,503.06 mi (8,856.32 km) |
| Tucson to Ommen | 5,477.52 mi (8,815.21 km) |
| Tucson to Oosterend | 5,444.71 mi (8,762.42 km) |
| Tucson to Oosterhout | 5,464.86 mi (8,794.84 km) |
| Tucson to Oosterwolde | 5,452.49 mi (8,774.93 km) |
| Tucson to Oostzaan | 5,431.38 mi (8,740.95 km) |
| Tucson to Opmeer | 5,421.97 mi (8,725.82 km) |
| Tucson to Oss | 5,481.32 mi (8,821.34 km) |
| Tucson to Oud-Beijerland | 5,442.11 mi (8,758.22 km) |
| Tucson to Oudenbosch | 5,456.08 mi (8,780.72 km) |
