| Amadora to Oerlinghausen | 1,254.84 mi (2,019.48 km) |
| Amadora to Oestrich-Winkel | 1,148.40 mi (1,848.17 km) |
| Amadora to Offenburg | 1,086.65 mi (1,748.79 km) |
| Amadora to Oftersheim | 1,145.17 mi (1,842.98 km) |
| Amadora to Ohrdruf | 1,279.93 mi (2,059.85 km) |
| Amadora to Ohringen | 1,173.86 mi (1,889.15 km) |
| Amadora to Olbernhau | 1,372.12 mi (2,208.21 km) |
| Amadora to Olching | 1,214.67 mi (1,954.82 km) |
| Amadora to Oldenburg | 1,294.50 mi (2,083.30 km) |
| Amadora to Oldenburg in Holstein | 1,429.06 mi (2,299.84 km) |
| Amadora to Olfen | 1,202.06 mi (1,934.52 km) |
| Amadora to Olpe | 1,185.47 mi (1,907.83 km) |
| Amadora to Olsberg | 1,221.84 mi (1,966.36 km) |
| Amadora to Oranienburg | 1,442.30 mi (2,321.15 km) |
| Amadora to Ortenberg | 1,200.68 mi (1,932.31 km) |
