| Omagh to Opole | 1,085.52 mi (1,746.98 km) |
| Omagh to Orzesze | 1,133.20 mi (1,823.70 km) |
| Omagh to Osowa | 1,027.63 mi (1,653.82 km) |
| Omagh to Ostroda | 1,097.87 mi (1,766.84 km) |
| Omagh to Ostroleka | 1,173.10 mi (1,887.92 km) |
| Omagh to Ostrow Mazowiecka | 1,191.80 mi (1,918.02 km) |
| Omagh to Ostrow Wielkopolski | 1,054.74 mi (1,697.43 km) |
| Omagh to Ostrowiec Swietokrzyski | 1,216.80 mi (1,958.26 km) |
| Omagh to Ostrzeszow | 1,065.27 mi (1,714.39 km) |
| Omagh to Oswiecim | 1,155.37 mi (1,859.39 km) |
| Omagh to Otwock | 1,181.62 mi (1,901.64 km) |
| Omagh to Ozarow Mazowiecki | 1,160.67 mi (1,867.92 km) |
| Omagh to Ozimek | 1,096.51 mi (1,764.67 km) |
| Omagh to Ozorkow | 1,105.80 mi (1,779.62 km) |
| Omagh to Pabianice | 1,117.45 mi (1,798.36 km) |
