La stazione è a un chilometro.

Italian usually uses the definite article much more often than English.

So la stazione means the station, and it sounds natural in a normal sentence.
Saying just stazione by itself would usually only happen in special contexts, like signs, labels, or very reduced speech.

Also, stazione is a feminine singular noun, so it takes la.

Stazione is a feminine noun in Italian, so it takes feminine articles and adjectives:

• la stazione
• una stazione
• questa stazione

Many nouns ending in -zione are feminine, so this is a useful pattern to remember.

In Italian, essere a + distance is a common way to say that something is a certain distance away.

So:

• è a un chilometro = it is one kilometer away
• è a due chilometri = it is two kilometers away

This is different from English, but it is very natural in Italian.

Because Italian does not need a separate word here.

In this sentence, a un chilometro already expresses the idea of distance, so the meaning of away is built into the structure.

English says:

• The station is a kilometer away

Italian says:

• La stazione è a un chilometro

If needed, Italian can make the reference point clearer by adding something like:

• La stazione è a un chilometro da qui = The station is a kilometer from here

Not necessarily.

La stazione è a un chilometro is grammatical and natural if the reference point is already understood from the context.

For example, if you are standing somewhere and asking for directions, everyone understands that the distance is from where you are.

If you want to be more explicit, you can say:

• La stazione è a un chilometro da qui
• La stazione dista un chilometro da qui

Because chilometro begins with a normal consonant sound, so the masculine singular indefinite article is un.

Use uno before nouns beginning with:

• s
  • consonant, like uno studente
• z, like uno zaino
• some other special consonant clusters

Since chilometro starts with a ch sound followed by a single consonant pattern, the correct form is:

• un chilometro

Because the number is one.

In Italian:

• un chilometro = one kilometer
• due chilometri = two kilometers
• tre chilometri = three kilometers

So the noun stays singular after un and becomes plural with numbers greater than one.

Chilometro means kilometer, and yes, it is a masculine noun.

Its basic forms are:

• il chilometro = the kilometer
• un chilometro = a kilometer
• i chilometri = the kilometers

So in this sentence, un chilometro is the correct masculine singular form.

Yes, stazione can mean station in a general sense, but in everyday Italian, la stazione often means the train station unless the context says otherwise.

If you want to be more specific, you can say:

• stazione ferroviaria = railway station / train station
• stazione degli autobus = bus station
• stazione di servizio = gas station / service station

So in many contexts, la stazione by itself will be understood as the train station.

Yes. A very common alternative is:

• La stazione dista un chilometro.

This uses the verb distare, which means to be at a distance of.

You can also say:

• La stazione dista un chilometro da qui.

Both this and La stazione è a un chilometro are natural, though essere a + distance may feel simpler for learners.

The structure is:

• La stazione = subject
• è = verb, is
• a un chilometro = expression of distance

So the sentence literally works like:

• The station is at one kilometer

But in natural English, that becomes:

• The station is a kilometer away
• The station is one kilometer away

This is a good example of how Italian and English often express the same idea with different structures.