| Sinaia to Opole | 508.36 mi (818.13 km) |
| Sinaia to Orzesze | 457.70 mi (736.60 km) |
| Sinaia to Osowa | 701.09 mi (1,128.30 km) |
| Sinaia to Ostroda | 628.48 mi (1,011.44 km) |
| Sinaia to Ostroleka | 562.47 mi (905.21 km) |
| Sinaia to Ostrow Mazowiecka | 540.44 mi (869.76 km) |
| Sinaia to Ostrow Wielkopolski | 560.47 mi (901.99 km) |
| Sinaia to Ostrowiec Swietokrzyski | 430.47 mi (692.78 km) |
| Sinaia to Ostrzeszow | 545.21 mi (877.44 km) |
| Sinaia to Oswiecim | 437.39 mi (703.91 km) |
| Sinaia to Otwock | 506.45 mi (815.05 km) |
| Sinaia to Ozarow Mazowiecki | 521.15 mi (838.71 km) |
| Sinaia to Ozimek | 499.84 mi (804.42 km) |
| Sinaia to Ozorkow | 538.84 mi (867.18 km) |
| Sinaia to Pabianice | 518.45 mi (834.36 km) |
