| DeForest to Opole | 4,621.11 mi (7,436.96 km) |
| DeForest to Orzesze | 4,671.68 mi (7,518.34 km) |
| DeForest to Osowa | 4,469.99 mi (7,193.76 km) |
| DeForest to Ostroda | 4,548.74 mi (7,320.50 km) |
| DeForest to Ostroleka | 4,627.08 mi (7,446.57 km) |
| DeForest to Ostrow Mazowiecka | 4,649.76 mi (7,483.07 km) |
| DeForest to Ostrow Wielkopolski | 4,573.03 mi (7,359.59 km) |
| DeForest to Ostrowiec Swietokrzyski | 4,721.60 mi (7,598.68 km) |
| DeForest to Ostrzeszow | 4,587.30 mi (7,382.55 km) |
| DeForest to Oswiecim | 4,692.43 mi (7,551.74 km) |
| DeForest to Otwock | 4,662.00 mi (7,502.77 km) |
| DeForest to Ozarow Mazowiecki | 4,642.72 mi (7,471.73 km) |
| DeForest to Ozimek | 4,630.08 mi (7,451.39 km) |
| DeForest to Ozorkow | 4,606.10 mi (7,412.81 km) |
| DeForest to Pabianice | 4,623.76 mi (7,441.22 km) |
