| Gresham to Oerlinghausen | 5,103.60 mi (8,213.45 km) |
| Gresham to Oestrich-Winkel | 5,201.07 mi (8,370.31 km) |
| Gresham to Offenburg | 5,287.87 mi (8,510.00 km) |
| Gresham to Oftersheim | 5,251.76 mi (8,451.90 km) |
| Gresham to Ohrdruf | 5,217.86 mi (8,397.33 km) |
| Gresham to Ohringen | 5,283.98 mi (8,503.74 km) |
| Gresham to Olbernhau | 5,286.00 mi (8,507.00 km) |
| Gresham to Olching | 5,386.35 mi (8,668.49 km) |
| Gresham to Oldenburg | 5,025.32 mi (8,087.48 km) |
| Gresham to Oldenburg in Holstein | 5,017.93 mi (8,075.59 km) |
| Gresham to Olfen | 5,087.54 mi (8,187.60 km) |
| Gresham to Olpe | 5,138.50 mi (8,269.62 km) |
| Gresham to Olsberg | 5,134.87 mi (8,263.77 km) |
| Gresham to Oranienburg | 5,159.43 mi (8,303.31 km) |
| Gresham to Ortenberg | 5,206.03 mi (8,378.30 km) |
