| Owings Mills to Orthez | 3,806.09 mi (6,125.31 km) |
| Owings Mills to Orvault | 3,668.15 mi (5,903.32 km) |
| Owings Mills to Osny | 3,781.36 mi (6,085.52 km) |
| Owings Mills to Ostwald | 4,031.03 mi (6,487.31 km) |
| Owings Mills to Ouistreham | 3,678.06 mi (5,919.27 km) |
| Owings Mills to Oullins | 3,991.57 mi (6,423.82 km) |
| Owings Mills to Outreau | 3,720.97 mi (5,988.32 km) |
| Owings Mills to Oyonnax | 4,012.24 mi (6,457.08 km) |
| Owings Mills to Ozoir-la-Ferriere | 3,814.65 mi (6,139.08 km) |
| Owings Mills to Pace | 3,640.29 mi (5,858.49 km) |
| Owings Mills to Palaiseau | 3,797.99 mi (6,112.28 km) |
| Owings Mills to Pamiers | 3,925.67 mi (6,317.75 km) |
| Owings Mills to Panazol | 3,834.54 mi (6,171.09 km) |
| Owings Mills to Pantin | 3,799.83 mi (6,115.24 km) |
| Owings Mills to Paray-le-Monial | 3,940.17 mi (6,341.09 km) |
