| La Crescenta-Montrose to Oerlinghausen | 5,673.41 mi (9,130.46 km) |
| La Crescenta-Montrose to Oestrich-Winkel | 5,754.94 mi (9,261.68 km) |
| La Crescenta-Montrose to Offenburg | 5,831.47 mi (9,384.84 km) |
| La Crescenta-Montrose to Oftersheim | 5,804.75 mi (9,341.85 km) |
| La Crescenta-Montrose to Ohrdruf | 5,791.22 mi (9,320.07 km) |
| La Crescenta-Montrose to Ohringen | 5,840.87 mi (9,399.97 km) |
| La Crescenta-Montrose to Olbernhau | 5,871.91 mi (9,449.92 km) |
| La Crescenta-Montrose to Olching | 5,947.17 mi (9,571.05 km) |
| La Crescenta-Montrose to Oldenburg | 5,600.30 mi (9,012.81 km) |
| La Crescenta-Montrose to Oldenburg in Holstein | 5,612.55 mi (9,032.52 km) |
| La Crescenta-Montrose to Olfen | 5,649.29 mi (9,091.65 km) |
| La Crescenta-Montrose to Olpe | 5,698.04 mi (9,170.11 km) |
| La Crescenta-Montrose to Olsberg | 5,699.87 mi (9,173.05 km) |
| La Crescenta-Montrose to Oranienburg | 5,756.42 mi (9,264.07 km) |
| La Crescenta-Montrose to Ortenberg | 5,767.75 mi (9,282.30 km) |
