Arrange the nights
Use three nights in Lisbon and three in Porto. Sintra is a day trip from the Lisbon room, with no hotel move or extra overnight there. The seventh day is for departure; add a night if your travel dates need one.
Plan the main outings
Choose the Sintra attraction first and allow the full approach before a timed palace entry. Move to Porto the following day, using the reserved mainline train and the local connection from Campanhã. The two full Porto days can cover the historic centre, Gaia and a chosen museum without a rushed Douro excursion.
Use the official planning information for the actual date and connection or access conditions.
If you have fewer days
For five days, keep one main city visit and the train move, then reduce the remaining sightseeing. Drop the Sintra excursion if you would rather have an unhurried Lisbon day; do not try to preserve every stop in fewer hours.
Guides for the stops
Lisbon · Sintra · Porto. Each guide explains the local arrival and visits so you can choose the parts that suit your trip.
Build the budget from nights and days
The day figures add up to €446.00 for one traveller before paid visits and extra journeys. The simple stay line buys one bed. These are chosen spending allowances, not available room offers or measured averages. Replace the stay amount with the full booking cost, including taxes and cleaning.
Add paid visits, excursions, intercity or inter-island tickets and airport journeys. The day notes separate accommodation, meals, local travel and small extras. The final day has no extra overnight allowance. The city budget cards are an alternative plan, so do not add them on top of this subtotal.