| Guyancourt to Oliveira do Bairro | 770.24 mi (1,239.58 km) |
| Guyancourt to Oliveira do Hospital | 758.36 mi (1,220.47 km) |
| Guyancourt to Ourem | 819.90 mi (1,319.51 km) |
| Guyancourt to Ovar | 756.00 mi (1,216.67 km) |
| Guyancourt to Pacos de Ferreira | 727.11 mi (1,170.16 km) |
| Guyancourt to Palmela | 891.36 mi (1,434.50 km) |
| Guyancourt to Paredes | 728.33 mi (1,172.13 km) |
| Guyancourt to Paredes de Coura | 699.78 mi (1,126.18 km) |
| Guyancourt to Penacova | 776.59 mi (1,249.80 km) |
| Guyancourt to Penafiel | 726.35 mi (1,168.95 km) |
| Guyancourt to Peniche | 862.04 mi (1,387.32 km) |
| Guyancourt to Peso da Regua | 711.61 mi (1,145.23 km) |
| Guyancourt to Pinhal Novo | 888.11 mi (1,429.28 km) |
| Guyancourt to Pinhel | 710.00 mi (1,142.64 km) |
| Guyancourt to Pombal | 807.12 mi (1,298.93 km) |
