| Florham Park to Oerlinghausen | 3,813.58 mi (6,137.36 km) |
| Florham Park to Oestrich-Winkel | 3,842.70 mi (6,184.23 km) |
| Florham Park to Offenburg | 3,884.77 mi (6,251.93 km) |
| Florham Park to Oftersheim | 3,884.73 mi (6,251.87 km) |
| Florham Park to Ohrdruf | 3,927.37 mi (6,320.48 km) |
| Florham Park to Ohringen | 3,927.02 mi (6,319.93 km) |
| Florham Park to Olbernhau | 4,034.09 mi (6,492.23 km) |
| Florham Park to Olching | 4,032.08 mi (6,489.00 km) |
| Florham Park to Oldenburg | 3,764.05 mi (6,057.66 km) |
| Florham Park to Oldenburg in Holstein | 3,832.98 mi (6,168.58 km) |
| Florham Park to Olfen | 3,770.17 mi (6,067.50 km) |
| Florham Park to Olpe | 3,807.23 mi (6,127.14 km) |
| Florham Park to Olsberg | 3,823.63 mi (6,153.54 km) |
| Florham Park to Oranienburg | 3,965.58 mi (6,381.99 km) |
| Florham Park to Ortenberg | 3,874.80 mi (6,235.90 km) |
