| Rio Grande City to Opole | 5,869.33 mi (9,445.78 km) |
| Rio Grande City to Orzesze | 5,919.52 mi (9,526.55 km) |
| Rio Grande City to Osowa | 5,732.44 mi (9,225.47 km) |
| Rio Grande City to Ostroda | 5,811.14 mi (9,352.12 km) |
| Rio Grande City to Ostroleka | 5,889.98 mi (9,479.00 km) |
| Rio Grande City to Ostrow Mazowiecka | 5,912.39 mi (9,515.07 km) |
| Rio Grande City to Ostrow Wielkopolski | 5,824.88 mi (9,374.23 km) |
| Rio Grande City to Ostrowiec Swietokrzyski | 5,977.55 mi (9,619.93 km) |
| Rio Grande City to Ostrzeszow | 5,838.47 mi (9,396.11 km) |
| Rio Grande City to Oswiecim | 5,940.82 mi (9,560.83 km) |
| Rio Grande City to Otwock | 5,921.57 mi (9,529.84 km) |
| Rio Grande City to Ozarow Mazowiecki | 5,901.82 mi (9,498.07 km) |
| Rio Grande City to Ozimek | 5,878.89 mi (9,461.16 km) |
| Rio Grande City to Ozorkow | 5,861.78 mi (9,433.62 km) |
| Rio Grande City to Pabianice | 5,878.50 mi (9,460.52 km) |
