| Antrim to Opole | 1,043.07 mi (1,678.65 km) |
| Antrim to Orzesze | 1,090.94 mi (1,755.70 km) |
| Antrim to Osowa | 983.43 mi (1,582.68 km) |
| Antrim to Ostroda | 1,053.74 mi (1,695.83 km) |
| Antrim to Ostroleka | 1,129.05 mi (1,817.04 km) |
| Antrim to Ostrow Mazowiecka | 1,147.81 mi (1,847.22 km) |
| Antrim to Ostrow Wielkopolski | 1,011.63 mi (1,628.06 km) |
| Antrim to Ostrowiec Swietokrzyski | 1,173.58 mi (1,888.69 km) |
| Antrim to Ostrzeszow | 1,022.29 mi (1,645.22 km) |
| Antrim to Oswiecim | 1,113.09 mi (1,791.34 km) |
| Antrim to Otwock | 1,137.89 mi (1,831.25 km) |
| Antrim to Ozarow Mazowiecki | 1,116.94 mi (1,797.54 km) |
| Antrim to Ozimek | 1,054.00 mi (1,696.24 km) |
| Antrim to Ozorkow | 1,062.33 mi (1,709.65 km) |
| Antrim to Pabianice | 1,074.12 mi (1,728.63 km) |
