| Carlow to Orzesze | 1,114.07 mi (1,792.93 km) |
| Carlow to Osowa | 1,040.91 mi (1,675.18 km) |
| Carlow to Ostroda | 1,106.56 mi (1,780.83 km) |
| Carlow to Ostroleka | 1,178.68 mi (1,896.89 km) |
| Carlow to Ostrow Mazowiecka | 1,195.87 mi (1,924.56 km) |
| Carlow to Ostrow Wielkopolski | 1,045.05 mi (1,681.84 km) |
| Carlow to Ostrowiec Swietokrzyski | 1,207.49 mi (1,943.26 km) |
| Carlow to Ostrzeszow | 1,053.98 mi (1,696.21 km) |
| Carlow to Oswiecim | 1,136.35 mi (1,828.78 km) |
| Carlow to Otwock | 1,180.17 mi (1,899.30 km) |
| Carlow to Ozarow Mazowiecki | 1,159.33 mi (1,865.76 km) |
| Carlow to Ozimek | 1,080.14 mi (1,738.32 km) |
| Carlow to Ozorkow | 1,100.65 mi (1,771.32 km) |
| Carlow to Pabianice | 1,110.10 mi (1,786.53 km) |
| Carlow to Parczew | 1,254.63 mi (2,019.13 km) |
