| Giessen to Olivenza | 1,125.33 mi (1,811.05 km) |
| Giessen to Olot | 650.32 mi (1,046.59 km) |
| Giessen to Onate | 737.99 mi (1,187.69 km) |
| Giessen to Onda | 851.28 mi (1,370.00 km) |
| Giessen to Onteniente | 929.87 mi (1,496.48 km) |
| Giessen to Orihuela | 983.69 mi (1,583.10 km) |
| Giessen to Osuna | 1,145.11 mi (1,842.88 km) |
| Giessen to Ourense | 967.88 mi (1,557.65 km) |
| Giessen to Oviedo | 844.44 mi (1,359.00 km) |
| Giessen to Paiporta | 887.90 mi (1,428.93 km) |
| Giessen to Pajara | 1,941.63 mi (3,124.76 km) |
| Giessen to Palafolls | 677.40 mi (1,090.17 km) |
| Giessen to Palafrugell | 653.50 mi (1,051.71 km) |
| Giessen to Palamos | 658.75 mi (1,060.15 km) |
| Giessen to Palencia | 862.14 mi (1,387.48 km) |
