Yes, the Sagrada Familia costs more, but you save time. You now have to decide which visitor type you belong to.
Type 1 “Save money and wait longer” = you buy on site
But this thinking is deceptive. Because in Barcelona, that’s usually not the case! Casa Batlló and Camp Nou are a vivid example of this! The purchase on site costs 4 euros more than online!
However, most prices are just as expensive in Barcelona as they are online. So, it makes no difference in price, but the time… yes, the time is the crux of the matter! You have to arm yourself with water, reading material and patience at the major sights such as the Picasso Museum or the Aquarium.
In the case of the Sagrada Família, it happened to me during a test that I only got admission 5 hours later. You can’t plan that!
Of course, the queues also depend entirely on the season. The busiest months are March-May and July-October. Since the climate here is quite mild, Barcelona is a popular destination for Easter and autumn holidays, but summer is also very busy!
Bottom line: You don’t really save money, but you have to expect waiting times at many sights.
Type 2 “Save time and spend a little more money” = you shop online
As said above, sometimes online prices are a bit higher. The museums charge an extra fee and so do the suppliers who offer these tickets.
But you also get something for that: You can pass the people waiting – everyone who has opted for the 1st type! So, you can tend to see more of the city, since you save 2.3 hours of “lifetime” here and there.
Bottom line: You might spend a few euros more, but save a lot of time at the admissions!
YOU alone can only decide which group of people you belong to.
But maybe a combination of both is possible. You don’t have to buy an online ticket for everything…
A mix of planned and spontaneous visits is always the best anyway!