| North Branch to Oerlinghausen | 4,259.34 mi (6,854.74 km) |
| North Branch to Oestrich-Winkel | 4,322.24 mi (6,955.97 km) |
| North Branch to Offenburg | 4,387.25 mi (7,060.60 km) |
| North Branch to Oftersheim | 4,370.06 mi (7,032.93 km) |
| North Branch to Ohrdruf | 4,378.10 mi (7,045.87 km) |
| North Branch to Ohringen | 4,409.23 mi (7,095.96 km) |
| North Branch to Olbernhau | 4,471.03 mi (7,195.42 km) |
| North Branch to Olching | 4,517.07 mi (7,269.53 km) |
| North Branch to Oldenburg | 4,193.95 mi (6,749.50 km) |
| North Branch to Oldenburg in Holstein | 4,229.59 mi (6,806.86 km) |
| North Branch to Olfen | 4,227.16 mi (6,802.95 km) |
| North Branch to Olpe | 4,272.41 mi (6,875.77 km) |
| North Branch to Olsberg | 4,279.93 mi (6,887.88 km) |
| North Branch to Oranienburg | 4,372.30 mi (7,036.54 km) |
| North Branch to Ortenberg | 4,342.72 mi (6,988.93 km) |
