| Biddeford to Olivares | 3,322.70 mi (5,347.36 km) |
| Biddeford to Olivenza | 3,235.98 mi (5,207.81 km) |
| Biddeford to Olot | 3,572.41 mi (5,749.25 km) |
| Biddeford to Onate | 3,323.02 mi (5,347.88 km) |
| Biddeford to Onda | 3,518.24 mi (5,662.06 km) |
| Biddeford to Onteniente | 3,540.07 mi (5,697.19 km) |
| Biddeford to Orihuela | 3,548.95 mi (5,711.48 km) |
| Biddeford to Osuna | 3,379.38 mi (5,438.59 km) |
| Biddeford to Ourense | 3,091.23 mi (4,974.85 km) |
| Biddeford to Oviedo | 3,156.47 mi (5,079.85 km) |
| Biddeford to Paiporta | 3,528.70 mi (5,678.89 km) |
| Biddeford to Pajara | 3,255.00 mi (5,238.42 km) |
| Biddeford to Palafolls | 3,600.97 mi (5,795.20 km) |
| Biddeford to Palafrugell | 3,611.54 mi (5,812.21 km) |
| Biddeford to Palamos | 3,612.34 mi (5,813.50 km) |
