| Arcata to Oerlinghausen | 5,425.09 mi (8,730.84 km) |
| Arcata to Oestrich-Winkel | 5,520.40 mi (8,884.23 km) |
| Arcata to Offenburg | 5,605.77 mi (9,021.62 km) |
| Arcata to Oftersheim | 5,571.04 mi (8,965.72 km) |
| Arcata to Ohrdruf | 5,539.98 mi (8,915.74 km) |
| Arcata to Ohringen | 5,603.88 mi (9,018.57 km) |
| Arcata to Olbernhau | 5,609.83 mi (9,028.15 km) |
| Arcata to Olching | 5,706.96 mi (9,184.46 km) |
| Arcata to Oldenburg | 5,347.42 mi (8,605.84 km) |
| Arcata to Oldenburg in Holstein | 5,342.53 mi (8,597.97 km) |
| Arcata to Olfen | 5,407.86 mi (8,703.12 km) |
| Arcata to Olpe | 5,458.58 mi (8,784.74 km) |
| Arcata to Olsberg | 5,455.73 mi (8,780.14 km) |
| Arcata to Oranienburg | 5,484.45 mi (8,826.38 km) |
| Arcata to Ortenberg | 5,526.52 mi (8,894.08 km) |
