| Greenfield to Oerlinghausen | 4,216.50 mi (6,785.80 km) |
| Greenfield to Oestrich-Winkel | 4,268.59 mi (6,869.64 km) |
| Greenfield to Offenburg | 4,326.32 mi (6,962.54 km) |
| Greenfield to Oftersheim | 4,314.81 mi (6,944.01 km) |
| Greenfield to Ohrdruf | 4,334.50 mi (6,975.70 km) |
| Greenfield to Ohringen | 4,355.31 mi (7,009.19 km) |
| Greenfield to Olbernhau | 4,432.69 mi (7,133.72 km) |
| Greenfield to Olching | 4,462.96 mi (7,182.45 km) |
| Greenfield to Oldenburg | 4,155.84 mi (6,688.18 km) |
| Greenfield to Oldenburg in Holstein | 4,202.68 mi (6,763.55 km) |
| Greenfield to Olfen | 4,180.34 mi (6,727.61 km) |
| Greenfield to Olpe | 4,223.20 mi (6,796.59 km) |
| Greenfield to Olsberg | 4,233.74 mi (6,813.55 km) |
| Greenfield to Oranienburg | 4,343.20 mi (6,989.70 km) |
| Greenfield to Ortenberg | 4,293.12 mi (6,909.11 km) |
