| Smartno to Oerlinghausen | 495.50 mi (797.43 km) |
| Smartno to Oestrich-Winkel | 417.81 mi (672.40 km) |
| Smartno to Offenburg | 364.67 mi (586.89 km) |
| Smartno to Oftersheim | 370.72 mi (596.62 km) |
| Smartno to Ohrdruf | 380.41 mi (612.21 km) |
| Smartno to Ohringen | 330.83 mi (532.42 km) |
| Smartno to Olbernhau | 326.84 mi (526.00 km) |
| Smartno to Olching | 222.96 mi (358.82 km) |
| Smartno to Oldenburg | 572.92 mi (922.03 km) |
| Smartno to Oldenburg in Holstein | 596.54 mi (960.04 km) |
| Smartno to Olfen | 517.75 mi (833.23 km) |
| Smartno to Olpe | 469.71 mi (755.93 km) |
| Smartno to Olsberg | 467.19 mi (751.87 km) |
| Smartno to Oranienburg | 469.22 mi (755.14 km) |
| Smartno to Ortenberg | 399.61 mi (643.11 km) |
