| Rio Maior to Oschatz | 1,343.96 mi (2,162.89 km) |
| Rio Maior to Oschersleben | 1,302.41 mi (2,096.03 km) |
| Rio Maior to Osnabruck | 1,206.32 mi (1,941.38 km) |
| Rio Maior to Ostbevern | 1,188.70 mi (1,913.02 km) |
| Rio Maior to Osterburg | 1,350.50 mi (2,173.43 km) |
| Rio Maior to Ostercappeln | 1,215.18 mi (1,955.64 km) |
| Rio Maior to Osterhofen | 1,261.62 mi (2,030.38 km) |
| Rio Maior to Osterholz-Scharmbeck | 1,272.53 mi (2,047.94 km) |
| Rio Maior to Osternienburg | 1,321.47 mi (2,126.70 km) |
| Rio Maior to Osterode | 1,256.11 mi (2,021.51 km) |
| Rio Maior to Osterwieck | 1,281.80 mi (2,062.85 km) |
| Rio Maior to Ostfildern | 1,107.86 mi (1,782.93 km) |
| Rio Maior to Osthofen | 1,107.51 mi (1,782.36 km) |
| Rio Maior to Ostrhauderfehn | 1,231.91 mi (1,982.57 km) |
| Rio Maior to Ostringen | 1,103.72 mi (1,776.27 km) |
