| Dayton to Olivares | 4,075.96 mi (6,559.62 km) |
| Dayton to Olivenza | 3,988.96 mi (6,419.62 km) |
| Dayton to Olot | 4,314.80 mi (6,944.00 km) |
| Dayton to Onate | 4,067.77 mi (6,546.45 km) |
| Dayton to Onda | 4,267.11 mi (6,867.25 km) |
| Dayton to Onteniente | 4,290.66 mi (6,905.16 km) |
| Dayton to Orihuela | 4,300.48 mi (6,920.96 km) |
| Dayton to Osuna | 4,132.58 mi (6,650.74 km) |
| Dayton to Ourense | 3,840.89 mi (6,181.31 km) |
| Dayton to Oviedo | 3,903.07 mi (6,281.38 km) |
| Dayton to Paiporta | 4,278.43 mi (6,885.46 km) |
| Dayton to Pajara | 3,988.14 mi (6,418.29 km) |
| Dayton to Palafolls | 4,344.28 mi (6,991.44 km) |
| Dayton to Palafrugell | 4,353.89 mi (7,006.92 km) |
| Dayton to Palamos | 4,354.89 mi (7,008.52 km) |
