| Dallas to Oberkirch | 5,164.08 mi (8,310.78 km) |
| Dallas to Obernburg am Main | 5,155.30 mi (8,296.65 km) |
| Dallas to Obernkirchen | 5,063.81 mi (8,149.42 km) |
| Dallas to Oberschleissheim | 5,307.77 mi (8,542.04 km) |
| Dallas to Oberstdorf | 5,291.62 mi (8,516.03 km) |
| Dallas to Obertraubling | 5,301.78 mi (8,532.39 km) |
| Dallas to Obertshausen | 5,135.29 mi (8,264.46 km) |
| Dallas to Oberursel | 5,120.64 mi (8,240.87 km) |
| Dallas to Ochsenfurt | 5,197.03 mi (8,363.80 km) |
| Dallas to Ochsenhausen | 5,253.21 mi (8,454.22 km) |
| Dallas to Ochtrup | 4,996.68 mi (8,041.37 km) |
| Dallas to Odenthal | 5,035.98 mi (8,104.62 km) |
| Dallas to Oelde | 5,044.91 mi (8,119.00 km) |
| Dallas to Oelsnitz | 5,244.16 mi (8,439.67 km) |
| Dallas to Oer-Erkenschwick | 5,019.05 mi (8,077.37 km) |
