Portugal is a beautiful country with so much to offer. Here's an ideal itinerary for 6 days in Portugal:

Day 1: Lisbon

Start your trip in the capital city of Lisbon. Spend the day exploring the historic neighborhoods of Alfama and Baixa, and visit the iconic Belem Tower and Jeronimos Monastery. In the evening, head to Bairro Alto for dinner and drinks.

Day 2: Sintra

Take a day trip to the charming town of Sintra, located just 30 minutes from Lisbon. Visit the colorful Pena Palace, the Moorish Castle, and the beautiful gardens of Quinta da Regaleira. In the evening, return to Lisbon for dinner.

Day 3: Porto

Take a morning flight to Porto, the second-largest city in Portugal. Spend the day exploring the historic Ribeira district, and visit the famous Port wine cellars for a tasting. In the evening, enjoy dinner at one of the many seafood restaurants along the riverfront.

Day 4: Douro Valley

Take a day trip to the stunning Douro Valley, known for its vineyards and scenic landscapes. Take a boat tour along the river, visit a local winery for a tasting, and enjoy a traditional Portuguese lunch in one of the small towns along the way.

Day 5: Coimbra

Take a morning train to the historic university town of Coimbra. Visit the beautiful Coimbra University, the Biblioteca Joanina, and the Old Cathedral. In the evening, enjoy dinner at one of the many traditional restaurants in the town center.

Day 6: Algarve

Take a morning flight to the sunny Algarve region in the south of Portugal. Spend the day relaxing on one of the many beautiful beaches, and enjoy a seafood lunch at a beachside restaurant. In the evening, return to Lisbon for your flight home.

I hope this itinerary helps you plan your trip to Portugal!