| Garden Grove to Oerlinghausen | 5,692.72 mi (9,161.55 km) |
| Garden Grove to Oestrich-Winkel | 5,773.41 mi (9,291.40 km) |
| Garden Grove to Offenburg | 5,849.38 mi (9,413.66 km) |
| Garden Grove to Oftersheim | 5,823.15 mi (9,371.45 km) |
| Garden Grove to Ohrdruf | 5,810.65 mi (9,351.34 km) |
| Garden Grove to Ohringen | 5,859.44 mi (9,429.86 km) |
| Garden Grove to Olbernhau | 5,891.93 mi (9,482.14 km) |
| Garden Grove to Olching | 5,965.87 mi (9,601.15 km) |
| Garden Grove to Oldenburg | 5,619.92 mi (9,044.39 km) |
| Garden Grove to Oldenburg in Holstein | 5,633.16 mi (9,065.69 km) |
| Garden Grove to Olfen | 5,668.22 mi (9,122.11 km) |
| Garden Grove to Olpe | 5,716.82 mi (9,200.34 km) |
| Garden Grove to Olsberg | 5,718.93 mi (9,203.72 km) |
| Garden Grove to Oranienburg | 5,777.08 mi (9,297.31 km) |
| Garden Grove to Ortenberg | 5,786.61 mi (9,312.64 km) |
