| Marshalltown to Oliveira de Frades | 4,197.75 mi (6,755.63 km) |
| Marshalltown to Oliveira do Bairro | 4,191.00 mi (6,744.76 km) |
| Marshalltown to Oliveira do Hospital | 4,225.18 mi (6,799.77 km) |
| Marshalltown to Ourem | 4,219.92 mi (6,791.30 km) |
| Marshalltown to Ovar | 4,172.29 mi (6,714.65 km) |
| Marshalltown to Pacos de Ferreira | 4,168.09 mi (6,707.89 km) |
| Marshalltown to Palmela | 4,245.15 mi (6,831.91 km) |
| Marshalltown to Paredes | 4,173.46 mi (6,716.54 km) |
| Marshalltown to Paredes de Coura | 4,137.63 mi (6,658.87 km) |
| Marshalltown to Penacova | 4,209.69 mi (6,774.85 km) |
| Marshalltown to Penafiel | 4,175.42 mi (6,719.69 km) |
| Marshalltown to Peniche | 4,194.94 mi (6,751.10 km) |
| Marshalltown to Peso da Regua | 4,199.32 mi (6,758.15 km) |
| Marshalltown to Pinhal Novo | 4,242.11 mi (6,827.02 km) |
| Marshalltown to Pinhel | 4,244.71 mi (6,831.21 km) |
