
Spend day one on the Gaudí buildings, day two in the Gothic Quarter, El Born and on the waterfront, and day three on Montjuïc. Add Montserrat as a fourth day. Book the Gaudí time slots first and build around them: they are the only part of a Barcelona itinerary you cannot rearrange on the day.
This is the day with fixed times, so it is the day to plan first. Sagrada Família and Park Güell are not next to each other — Park Güell is on the hill above Gràcia — so leave travel time between the two slots.

If you can only get one Gaudí interior, make it Sagrada Família. The others can be appreciated from the street; its interior is the point.
This is the day that needs no bookings, so it can move if the Gaudí slots force a change. The Gothic Quarter, El Born and the waterfront sit next to each other between Plaça de Catalunya and the sea.

La Rambla runs through the middle of all this. Walk it once, briefly, and turn off early: it is the most pickpocketed street in the city, and the food on it is priced for people who will not come back.

The hill south of the centre is the half-day most itineraries cut, and it holds the Joan Miró Foundation, the Montjuïc castle and the best free view of the city.

A fourth day is for leaving the city. Four trips sit within about an hour by train, and Montserrat is the one to choose if you only do one.
| Where | Travel time, one way | Best for |
|---|---|---|
| Montserrat | About 1 hour, plus rack railway or cable car | Mountain monastery on a serrated rock massif |
| Girona | 40 minutes by high-speed train | A small walled city with an intact Jewish quarter |
| Sitges | 35 minutes by local train | Beach town; the only one that works as a half day |
| Tarragona | About 1 hour | Roman amphitheatre above the sea |
Leave for Montserrat in the morning and plan to be back for dinner. The train, the rack railway or cable car, and the monastery take the whole day.

One day is a stopover, not a visit, but it can hold the two things Barcelona is known for if one of them is booked in advance.
Park Güell and Montjuïc are what a one-day trip gives up. Both need half a day, and both are a metro ride from everything else.
The same itinerary needs different hours in different months. These are the 1981-2010 climate normals for Barcelona Aeropuerto from AEMET, the Spanish state meteorological agency.

Barcelona is walkable in the centre and metro-linked at the edges. Knowing which legs to walk saves more time than any shortcut.

Three full days — one for the Gaudí buildings, one for the old city and the waterfront, and one for Montjuïc. Add a fourth for Montserrat. The how-many-days guide sets out what each extra day adds.
Sagrada Família, Park Güell, Casa Batlló or La Pedrera, the Gothic Quarter, Santa Maria del Mar in El Born, and the view from Montjuïc. Montserrat is the day trip most worth the train fare.
Lingering on La Rambla, which is the most pickpocketed street in the city; eating at the tourist-priced Boqueria; and turning up at the Gaudí buildings without a timed ticket in summer.
You can see Sagrada Família and walk the Gothic Quarter and El Born in one day, provided the Sagrada Família slot is booked. Park Güell and Montjuïc need another day.
Sagrada Família in the morning, then Casa Batlló and La Pedrera on Passeig de Gràcia, and Park Güell in the afternoon. Leave travel time before Park Güell, which sits on the hill above Gràcia.
Things to Do in BarcelonaThe main guide — how long to stay and what is worth the time.
Where to Stay in BarcelonaWhich part of Barcelona to sleep in, and who each area suits.
Best Time to Visit BarcelonaWhen to go to Barcelona, month by month.
How Many Days in Barcelona?How long you actually need in Barcelona, and what fits in each extra day.