Facturé el bulto en el aeropuerto.

Yes, facturar often does mean to invoice / to bill in business contexts.

But in Spain, facturar also commonly means to check in luggage at an airport. So in this sentence, facturé el bulto means that the speaker checked in a piece of luggage or a bag.

Context is what tells you which meaning is intended. Because the sentence includes en el aeropuerto, the airport meaning is the natural one.

Facturé is the first-person singular preterite of facturar.

So it means I checked in or I billed/invoiced, depending on context.

Here:

• yo facturé = I checked in

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

In Spanish, subject pronouns are often omitted because the verb ending already shows who the subject is.

• facturé clearly means I checked in
• so yo is unnecessary unless you want emphasis or contrast

For example:

• Facturé el bulto en el aeropuerto. = neutral
• Yo facturé el bulto, no mi hermano. = emphatic contrast

Facturé is the preterite, which is used for a completed past event.

• Facturé el bulto en el aeropuerto. = I checked in the bag at the airport.
  This sounds like one finished action.

Facturaba is the imperfect, which would suggest:

• a repeated action in the past,
• an ongoing action,
• or background information.

For example:

• Cuando viajaba por trabajo, siempre facturaba una maleta.
  = When I travelled for work, I always checked in a suitcase.

So in your sentence, facturé is the natural choice because it refers to one specific completed event.

Bulto is a fairly general word meaning something like:

• bundle
• package
• piece
• bulky item
• sometimes piece of luggage, depending on context

In an airport sentence, it can refer to a bag or piece of checked luggage.

That said, for many learners, bulto may sound less specific than words like:

• la maleta = suitcase
• el equipaje = luggage
• la bolsa = bag

So bulto is understandable, but it is more general than maleta.

It can be used, but it is not always the most everyday word a learner will hear first.

In travel contexts in Spain, you are also very likely to hear:

• equipaje
• maleta
• bolsa
• bulto in more official, logistical, or generic senses, meaning item / piece / package

For example, signs or rules may refer to a bulto as a generic item:

• one item per passenger
• bulky item
• unattended package

So the sentence is fine, but Facturé la maleta or Facturé el equipaje may feel more immediately familiar to learners.

All three are possible, but they mean slightly different things.

• el bulto = the item / the bag
  This usually refers to a specific item already known from context.
• un bulto = a bag / an item
  This introduces it as non-specific.
• mi bulto = my bag / my item
  This explicitly states ownership.

Spanish often uses the definite article more than English does when the context already makes ownership or reference clear.

So Facturé el bulto sounds like:

• the speaker is talking about a particular piece of luggage already understood in the conversation.

Because en expresses location, while a / al usually expresses movement toward a place.

• en el aeropuerto = at the airport
• al aeropuerto = to the airport

Here, the action of checking in the luggage happened at that location, so en el aeropuerto is correct.

Compare:

• Fui al aeropuerto. = I went to the airport.
• Facturé el bulto en el aeropuerto. = I checked in the bag at the airport.

You may hear English-influenced expressions like hacer el check-in, especially in travel contexts, but in Spain the most natural verb for luggage is usually facturar.

So:

• Facturé la maleta.
• Facturé el equipaje.

are very natural.

By contrast, hacer el check-in is often used more for:

• checking in for a flight,
• checking in online,
• or sometimes hotel check-in.

So if you specifically mean checking in luggage, facturar is the best verb.

In airport language, facturar mainly refers to luggage.

You can say:

• Facturé la maleta.
• Tengo que facturar el equipaje.

For the passenger’s own check-in process, Spanish may use:

• hacer el check-in
• sacar la tarjeta de embarque
• or simply expressions based on the overall airport process

So facturar is most strongly associated with bags and luggage, not with the person in the same way English check in can be.

The accent mark shows that the stress falls on the last syllable:

• fac-tu-RÉ

This is also a normal spelling pattern for the first-person singular preterite of regular -ar verbs:

• hablé
• compré
• facturé

The accent is important because without it, facture would be a different form:

• present subjunctive
• or the usted command form

So facturé specifically means I checked in / I invoiced in the past.

Yes, absolutely.

A very natural version would be:

• Facturé el equipaje en el aeropuerto.

That means essentially the same thing, but equipaje is broader and more standard for luggage as a category.

Compare:

• el bulto = the item / bundle / piece
• el equipaje = the luggage
• la maleta = the suitcase

Which one sounds best depends on how specific you want to be.

Yes, it is grammatical and understandable in Spain, especially because facturar is the standard travel verb there for checking in luggage.

The only point is that bulto is a bit more general than the most common learner-friendly travel words. Depending on context, some speakers might more naturally say:

• Facturé la maleta en el aeropuerto.
• Facturé el equipaje en el aeropuerto.

So the structure is natural, and the main thing to notice is the vocabulary choice of bulto, which is broader and less specific than maleta.