| Biddeford to Nuth | 3,458.21 mi (5,565.46 km) |
| Biddeford to Oegstgeest | 3,368.82 mi (5,421.60 km) |
| Biddeford to Oirschot | 3,419.37 mi (5,502.95 km) |
| Biddeford to Oisterwijk | 3,413.22 mi (5,493.04 km) |
| Biddeford to Oldebroek | 3,418.34 mi (5,501.29 km) |
| Biddeford to Oldenzaal | 3,462.16 mi (5,571.81 km) |
| Biddeford to Ommen | 3,436.77 mi (5,530.94 km) |
| Biddeford to Oosterend | 3,410.65 mi (5,488.91 km) |
| Biddeford to Oosterhout | 3,398.02 mi (5,468.59 km) |
| Biddeford to Oosterwolde | 3,419.68 mi (5,503.45 km) |
| Biddeford to Oostzaan | 3,378.95 mi (5,437.90 km) |
| Biddeford to Opmeer | 3,374.90 mi (5,431.37 km) |
| Biddeford to Oss | 3,420.99 mi (5,505.56 km) |
| Biddeford to Oud-Beijerland | 3,375.42 mi (5,432.21 km) |
| Biddeford to Oudenbosch | 3,386.15 mi (5,449.48 km) |
