| Rotterdam to Oerlinghausen | 177.48 mi (285.63 km) |
| Rotterdam to Oestrich-Winkel | 201.80 mi (324.77 km) |
| Rotterdam to Offenburg | 282.57 mi (454.75 km) |
| Rotterdam to Oftersheim | 250.88 mi (403.75 km) |
| Rotterdam to Ohrdruf | 279.06 mi (449.10 km) |
| Rotterdam to Ohringen | 288.68 mi (464.58 km) |
| Rotterdam to Olbernhau | 391.05 mi (629.34 km) |
| Rotterdam to Olching | 396.42 mi (637.97 km) |
| Rotterdam to Oldenburg | 177.61 mi (285.84 km) |
| Rotterdam to Oldenburg in Holstein | 311.61 mi (501.50 km) |
| Rotterdam to Olfen | 123.92 mi (199.42 km) |
| Rotterdam to Olpe | 156.35 mi (251.62 km) |
| Rotterdam to Olsberg | 175.23 mi (282.01 km) |
| Rotterdam to Oranienburg | 373.13 mi (600.50 km) |
| Rotterdam to Ortenberg | 224.96 mi (362.04 km) |
