| Owings Mills to Oliveira de Frades | 3,531.80 mi (5,683.88 km) |
| Owings Mills to Oliveira do Bairro | 3,521.73 mi (5,667.67 km) |
| Owings Mills to Oliveira do Hospital | 3,556.87 mi (5,724.22 km) |
| Owings Mills to Ourem | 3,541.67 mi (5,699.77 km) |
| Owings Mills to Ovar | 3,506.09 mi (5,642.50 km) |
| Owings Mills to Pacos de Ferreira | 3,506.97 mi (5,643.92 km) |
| Owings Mills to Palmela | 3,555.03 mi (5,721.27 km) |
| Owings Mills to Paredes | 3,511.91 mi (5,651.87 km) |
| Owings Mills to Paredes de Coura | 3,482.70 mi (5,604.86 km) |
| Owings Mills to Penacova | 3,538.79 mi (5,695.14 km) |
| Owings Mills to Penafiel | 3,514.13 mi (5,655.45 km) |
| Owings Mills to Peniche | 3,510.54 mi (5,649.67 km) |
| Owings Mills to Peso da Regua | 3,539.63 mi (5,696.49 km) |
| Owings Mills to Pinhal Novo | 3,552.55 mi (5,717.28 km) |
| Owings Mills to Pinhel | 3,583.95 mi (5,767.82 km) |
