| Targu Ocna to Olivenza | 1,781.31 mi (2,866.74 km) |
| Targu Ocna to Olot | 1,222.59 mi (1,967.57 km) |
| Targu Ocna to Onate | 1,436.34 mi (2,311.57 km) |
| Targu Ocna to Onda | 1,416.36 mi (2,279.42 km) |
| Targu Ocna to Onteniente | 1,469.64 mi (2,365.16 km) |
| Targu Ocna to Orihuela | 1,511.06 mi (2,431.82 km) |
| Targu Ocna to Osuna | 1,736.13 mi (2,794.04 km) |
| Targu Ocna to Ourense | 1,712.69 mi (2,756.31 km) |
| Targu Ocna to Oviedo | 1,592.52 mi (2,562.91 km) |
| Targu Ocna to Paiporta | 1,440.67 mi (2,318.53 km) |
| Targu Ocna to Pajara | 2,519.74 mi (4,055.13 km) |
| Targu Ocna to Palafolls | 1,223.66 mi (1,969.29 km) |
| Targu Ocna to Palafrugell | 1,197.42 mi (1,927.06 km) |
| Targu Ocna to Palamos | 1,200.95 mi (1,932.74 km) |
| Targu Ocna to Palencia | 1,561.80 mi (2,513.47 km) |
