| Ennis to Orzesze | 1,199.53 mi (1,930.46 km) |
| Ennis to Osowa | 1,122.64 mi (1,806.72 km) |
| Ennis to Ostroda | 1,189.21 mi (1,913.85 km) |
| Ennis to Ostroleka | 1,261.90 mi (2,030.83 km) |
| Ennis to Ostrow Mazowiecka | 1,279.33 mi (2,058.88 km) |
| Ennis to Ostrow Wielkopolski | 1,129.98 mi (1,818.53 km) |
| Ennis to Ostrowiec Swietokrzyski | 1,292.46 mi (2,080.02 km) |
| Ennis to Ostrzeszow | 1,139.03 mi (1,833.10 km) |
| Ennis to Oswiecim | 1,221.81 mi (1,966.31 km) |
| Ennis to Otwock | 1,264.36 mi (2,034.79 km) |
| Ennis to Ozarow Mazowiecki | 1,243.50 mi (2,001.21 km) |
| Ennis to Ozimek | 1,165.50 mi (1,875.69 km) |
| Ennis to Ozorkow | 1,185.20 mi (1,907.39 km) |
| Ennis to Pabianice | 1,194.87 mi (1,922.95 km) |
| Ennis to Parczew | 1,338.99 mi (2,154.90 km) |
