| Cortland to Opole | 4,190.72 mi (6,744.32 km) |
| Cortland to Orzesze | 4,240.32 mi (6,824.14 km) |
| Cortland to Osowa | 4,072.75 mi (6,554.46 km) |
| Cortland to Ostroda | 4,150.77 mi (6,680.01 km) |
| Cortland to Ostroleka | 4,229.89 mi (6,807.36 km) |
| Cortland to Ostrow Mazowiecka | 4,251.69 mi (6,842.43 km) |
| Cortland to Ostrow Wielkopolski | 4,150.12 mi (6,678.97 km) |
| Cortland to Ostrowiec Swietokrzyski | 4,306.68 mi (6,930.92 km) |
| Cortland to Ostrzeszow | 4,162.93 mi (6,699.59 km) |
| Cortland to Oswiecim | 4,262.02 mi (6,859.05 km) |
| Cortland to Otwock | 4,255.95 mi (6,849.29 km) |
| Cortland to Ozarow Mazowiecki | 4,235.66 mi (6,816.64 km) |
| Cortland to Ozimek | 4,200.80 mi (6,760.53 km) |
| Cortland to Ozorkow | 4,191.25 mi (6,745.16 km) |
| Cortland to Pabianice | 4,206.72 mi (6,770.06 km) |
