| Great Falls to Opole | 5,014.42 mi (8,069.93 km) |
| Great Falls to Orzesze | 5,063.94 mi (8,149.63 km) |
| Great Falls to Osowa | 4,810.05 mi (7,741.02 km) |
| Great Falls to Ostroda | 4,885.26 mi (7,862.06 km) |
| Great Falls to Ostroleka | 4,957.30 mi (7,978.00 km) |
| Great Falls to Ostrow Mazowiecka | 4,980.25 mi (8,014.94 km) |
| Great Falls to Ostrow Wielkopolski | 4,954.94 mi (7,974.20 km) |
| Great Falls to Ostrowiec Swietokrzyski | 5,079.56 mi (8,174.77 km) |
| Great Falls to Ostrzeszow | 4,971.12 mi (8,000.25 km) |
| Great Falls to Oswiecim | 5,081.70 mi (8,178.20 km) |
| Great Falls to Otwock | 5,006.73 mi (8,057.56 km) |
| Great Falls to Ozarow Mazowiecki | 4,990.48 mi (8,031.40 km) |
| Great Falls to Ozimek | 5,020.76 mi (8,080.13 km) |
| Great Falls to Ozorkow | 4,970.78 mi (7,999.69 km) |
| Great Falls to Pabianice | 4,991.51 mi (8,033.06 km) |
