Depois de desembarcar, a passageira foi direto ao balcão para perguntar pela mala.

Both are possible, but they work a little differently.

• depois de + infinitive is very common in Portuguese:

  • Depois de desembarcar...
  • literally, after landing / after disembarking

• depois que + finite verb is also possible:

  • Depois que desembarcou...
  • after she landed

In this sentence, depois de desembarcar sounds compact and natural. Portuguese often uses preposition + infinitive where English might use a full clause.

A useful rule:

• If the subject is the same as the main clause, Portuguese often likes the infinitive:
  • Depois de comer, ele saiu.
• If you want to make the subject more explicit, a full clause is also possible:
  • Depois que ele comeu, saiu.

It is the infinitive.

After many prepositions in Portuguese, you use the infinitive:

• antes de sair
• sem falar
• para perguntar
• depois de desembarcar

So in depois de desembarcar, the structure is:

• depois de = after
• desembarcar = to disembark / to get off / to land

This is a very common pattern in Portuguese grammar.

Because a passageira refers to a specific passenger, not just any passenger.

• uma passageira = a passenger
• a passageira = the passenger

Portuguese often uses the definite article in narration when the person is already identified by context.

Compare:

• Uma passageira entrou no avião. = A passenger got on the plane.
• A passageira foi ao balcão. = The passenger went to the counter.

So if the passenger is already known in the situation or story, a passageira is natural.

Foi is the preterite of ir.

• infinitive: ir = to go
• preterite: fui, foi, fomos, foram

Here, foi means went.

The preterite is used because this is a completed action in the past:

• she landed
• she went to the counter
• she asked about the suitcase

If it were ia, that would be the imperfect and would suggest something more ongoing, habitual, or backgrounded:

• A passageira ia ao balcão... = The passenger was going / used to go to the counter

But here the action is a single completed event, so foi is the right choice.

Here direto is being used adverbially, meaning straight or directly, so it usually stays in the masculine singular form.

• foi direto ao balcão = went straight to the counter

Even though passageira is feminine, direto here is not really describing the noun passageira. It is describing how she went.

This kind of adverb-like use is very common in Brazilian Portuguese:

• ir direto
• falar baixo
• custar caro

So:

• A passageira foi direto ao balcão. = natural

You may sometimes hear agreement in similar expressions in some varieties or styles, but direto as an invariable adverbial form is very common and natural in Brazil.

Ao is a contraction of:

• a
  • o = ao

So:

• ao balcão = to the counter

This happens because balcão is a masculine singular noun:

• o balcão

And the verb phrase here uses a:

• ir a algum lugar = to go to some place

So:

• foi a o balcão becomes foi ao balcão

Other common contractions:

• a + a = à
• de + o = do
• de + a = da
• por + o = pelo
• por + a = pela

Yes. Both can work.

• foi ao balcão
• foi para o balcão

Both mean she went to the counter.

A small nuance:

• ir a can sound a bit more neutral or traditional
• ir para can sometimes emphasize direction/destination a bit more

In everyday Brazilian Portuguese, both are common. In this sentence, foi direto ao balcão sounds very natural and concise.

Here balcão means a service counter or desk, such as an airport counter.

It does not necessarily mean a kitchen counter or a bar counter here. The exact meaning depends on context.

In an airport context:

• balcão da companhia aérea = airline counter
• balcão de informações = information desk
• balcão de atendimento = service counter

So in this sentence, it means the place where the passenger goes to ask for help.

Para + infinitive is used to show purpose.

So:

• para perguntar pela mala
• in order to ask about the suitcase

This is one of the most useful patterns in Portuguese:

• Fui lá para falar com ela.
• Ele saiu para comprar pão.
• Cheguei cedo para estudar.

So the structure is:

• action 1: foi direto ao balcão
• purpose: para perguntar pela mala

Perguntar por alguém/algo often means to ask about someone or something, especially in the sense of asking where it is, asking after it, or asking for information about it.

So:

• perguntar pela mala = ask about the suitcase / ask where the suitcase is

This fits the airport context very well.

You could also say:

• perguntar sobre a mala

But that can sound a bit broader or more general, like asking concerning the suitcase as a topic.

In this sentence, perguntar pela mala sounds very natural for someone trying to locate missing luggage.

Also note:

• pela = por + a
• because mala is feminine:
  • a mala
  • por + a mala = pela mala

It depends on what comes after it.

Perguntar can appear in different patterns:

1. perguntar algo

   • Ela perguntou o nome dele.
   • She asked his name.

2. perguntar a alguém

   • Ela perguntou ao funcionário...
   • She asked the employee...

3. perguntar por alguém/algo

   • Ela perguntou pela mala.
   • She asked about the suitcase.

4. perguntar sobre algo

   • Ela perguntou sobre o voo.
   • She asked about the flight.

So in your sentence, perguntar pela mala is one normal and idiomatic pattern.

Because Depois de desembarcar is an introductory adverbial phrase/clause, and Portuguese normally separates that from the main clause with a comma.

So the sentence is structured like this:

• Depois de desembarcar, = after landing
• a passageira foi direto ao balcão... = the passenger went straight to the counter...

This is similar to English:

• After landing, the passenger went straight to the counter...

The comma helps mark the transition from the opening time expression to the main action.

In this sentence, mala refers to a suitcase or a specific piece of luggage.

• mala = suitcase
• bagagem = luggage/baggage in a more general or collective sense

Compare:

• Ela perdeu a mala. = She lost the suitcase.
• Ela perdeu a bagagem. = She lost her luggage.

So mala is more specific, while bagagem is broader. In an airport situation, both are common, but they are not exactly the same.