| Diamond Bar to Oliveira de Frades | 5,607.76 mi (9,024.82 km) |
| Diamond Bar to Oliveira do Bairro | 5,603.08 mi (9,017.28 km) |
| Diamond Bar to Oliveira do Hospital | 5,636.24 mi (9,070.66 km) |
| Diamond Bar to Ourem | 5,636.88 mi (9,071.68 km) |
| Diamond Bar to Ovar | 5,582.79 mi (8,984.64 km) |
| Diamond Bar to Pacos de Ferreira | 5,575.58 mi (8,973.04 km) |
| Diamond Bar to Palmela | 5,668.47 mi (9,122.53 km) |
| Diamond Bar to Paredes | 5,581.14 mi (8,981.98 km) |
| Diamond Bar to Paredes de Coura | 5,541.76 mi (8,918.60 km) |
| Diamond Bar to Penacova | 5,622.50 mi (9,048.54 km) |
| Diamond Bar to Penafiel | 5,582.92 mi (8,984.84 km) |
| Diamond Bar to Peniche | 5,615.65 mi (9,037.52 km) |
| Diamond Bar to Peso da Regua | 5,605.49 mi (9,021.17 km) |
| Diamond Bar to Pinhal Novo | 5,665.16 mi (9,117.20 km) |
| Diamond Bar to Pinhel | 5,650.91 mi (9,094.26 km) |
