| Giffnock to Oerlinghausen | 589.47 mi (948.65 km) |
| Giffnock to Oestrich-Winkel | 649.13 mi (1,044.67 km) |
| Giffnock to Offenburg | 723.31 mi (1,164.05 km) |
| Giffnock to Oftersheim | 698.06 mi (1,123.41 km) |
| Giffnock to Ohrdruf | 707.12 mi (1,138.00 km) |
| Giffnock to Ohringen | 735.93 mi (1,184.36 km) |
| Giffnock to Olbernhau | 807.77 mi (1,299.99 km) |
| Giffnock to Olching | 843.52 mi (1,357.52 km) |
| Giffnock to Oldenburg | 533.88 mi (859.19 km) |
| Giffnock to Oldenburg in Holstein | 608.36 mi (979.07 km) |
| Giffnock to Olfen | 553.32 mi (890.48 km) |
| Giffnock to Olpe | 597.83 mi (962.12 km) |
| Giffnock to Olsberg | 606.54 mi (976.13 km) |
| Giffnock to Oranienburg | 735.65 mi (1,183.91 km) |
| Giffnock to Ortenberg | 668.14 mi (1,075.26 km) |
