| Grass Valley to Opole | 5,747.73 mi (9,250.08 km) |
| Grass Valley to Orzesze | 5,796.74 mi (9,328.96 km) |
| Grass Valley to Osowa | 5,535.95 mi (8,909.25 km) |
| Grass Valley to Ostroda | 5,609.85 mi (9,028.17 km) |
| Grass Valley to Ostroleka | 5,680.04 mi (9,141.15 km) |
| Grass Valley to Ostrow Mazowiecka | 5,702.84 mi (9,177.84 km) |
| Grass Valley to Ostrow Wielkopolski | 5,686.85 mi (9,152.11 km) |
| Grass Valley to Ostrowiec Swietokrzyski | 5,806.42 mi (9,344.53 km) |
| Grass Valley to Ostrzeszow | 5,703.23 mi (9,178.46 km) |
| Grass Valley to Oswiecim | 5,813.89 mi (9,356.55 km) |
| Grass Valley to Otwock | 5,731.78 mi (9,224.41 km) |
| Grass Valley to Ozarow Mazowiecki | 5,716.23 mi (9,199.38 km) |
| Grass Valley to Ozimek | 5,753.61 mi (9,259.54 km) |
| Grass Valley to Ozorkow | 5,699.69 mi (9,172.77 km) |
| Grass Valley to Pabianice | 5,720.80 mi (9,206.73 km) |
