Si te viene bien, podemos quedar media hora antes para mirar la cartelera con calma.

It means if it suits you, if it works for you, or if it’s convenient for you.

Literally, venir bien is something like to come well to someone, but in real Spanish it is a very common idiomatic expression for plans, times, or arrangements that are convenient.

So:

• Si te viene bien = If it works for you
• ¿Te viene bien mañana? = Does tomorrow work for you?

It is very natural in everyday Spanish.

The te means to you.

In this expression, the thing that is convenient is the grammatical subject, and the person affected is shown with an indirect object pronoun:

• Me viene bien = it suits me
• Te viene bien = it suits you
• Le viene bien = it suits him / her / you (formal)

So in Si te viene bien, the idea is literally closer to if it comes in handy to you / if it suits you.

Because venir is not referring to you as the subject.

The subject is the unstated idea of that plan / that time / that arrangement. In other words, it is what comes or suits you.

So:

• te = to you
• viene = it suits / it works

That is why the verb is third person singular: viene.

Here quedar means to arrange to meet or to meet up.

In Spain, this use of quedar is extremely common:

• Quedamos a las seis = We’ll meet at six
• He quedado con Ana = I’ve arranged to meet Ana

So podemos quedar media hora antes means we can meet half an hour earlier.

This is a very Spanish everyday verb, and learners often first know quedar as to remain / to be left, but it also has this very common meaning of meeting up.

Because quedar is the normal, idiomatic choice for arranging a meeting in Spain.

• podemos quedar = natural, everyday
• podemos encontrarnos = understandable, but usually sounds more like we can run into each other / meet each other, or just less idiomatic for making plans

If you are learning Spanish from Spain, quedar is the form you will hear all the time for social plans.

It means half an hour earlier / half an hour before.

• media hora = half an hour
• antes = before / earlier

In context, it means half an hour before the previously expected meeting time or event time. Spanish often leaves that reference point implicit if it is already understood from the conversation.

So this sentence is suggesting: we could meet 30 minutes earlier.

Because antes can be used on its own when the reference point is understood.

• Media hora antes = half an hour earlier
• Media hora antes de la película = half an hour before the film

If the sentence explicitly says what comes later, then de is needed:

• antes de empezar
• antes de la sesión

But here, the speaker does not need to repeat it.

In Spain, la cartelera usually refers to the list of films currently showing, often with cinemas and showtimes. It can also be used more generally for listings of shows or cultural events, depending on context.

In this sentence, it most likely means the cinema listings or what’s on at the cinema.

A learner might think of cartel = poster, but cartelera here is not just one poster. It is more like the listings / schedule of what is showing.

Both can be possible, but mirar emphasizes looking at something, while ver is more like seeing.

Here, mirar la cartelera suggests taking a look at the listings in order to choose calmly.

So:

• mirar = to look at
• ver = to see

In everyday speech, both verbs can overlap a bit, but mirar fits especially well because they are intentionally examining the listings.

Con calma means calmly, without rushing, or at leisure.

It adds the idea that they want enough time to look through the listings properly, without stress.

So:

• mirar la cartelera con calma = look at the listings properly / take our time looking at the listings

It is a very common expression in Spanish:

• Hazlo con calma = Do it calmly / take your time
• Lo hablamos con calma = We’ll talk about it properly / when we’re not rushed

Para expresses purpose: in order to.

So:

• podemos quedar media hora antes para mirar la cartelera con calma
• we can meet half an hour earlier in order to look at the listings without rushing

This is a very common structure:

• Voy al supermercado para comprar pan = I’m going to the supermarket to buy bread
• Te llamo para confirmar = I’m calling you to confirm

Because Spanish usually leaves subject pronouns out when the verb already makes the subject clear.

• podemos already tells you the subject is we
• viene with te already makes the structure clear enough in context

So nosotros podemos quedar is grammatically possible, but it is usually unnecessary unless you want emphasis or contrast.

Spanish often sounds more natural without the pronoun:

• Podemos quedar rather than Nosotros podemos quedar

Yes, this version is informal because it uses te, which corresponds to tú.

Formal singular:

• Si le viene bien...

Informal plural in Spain:

• Si os viene bien...

Formal plural:

• Si les viene bien...

So the sentence could become:

• Si le viene bien, podemos quedar media hora antes...
• Si os viene bien, podemos quedar media hora antes...

Yes. Si te va bien is also very common and usually means almost the same thing: if it works for you.

In many contexts, venir bien and ir bien are both natural:

• ¿Te viene bien el viernes?
• ¿Te va bien el viernes?

Both are common, though exact preference can vary by region and speaker. In Spain, venir bien is very frequent and sounds perfectly natural here.

Yes, very natural.

Several parts are especially typical of everyday Spanish from Spain:

• Si te viene bien = common way to say if it suits you
• quedar = very common in Spain for arranging to meet
• la cartelera = normal word for cinema/show listings
• con calma = very common expression meaning without rushing

So this sentence sounds like normal spoken Spanish from Spain, especially in a casual plan-making context.