Durante el trayecto en autobús, prefiero escuchar música y no mirar el móvil.

Durante means during, so Durante el trayecto en autobús means during the bus journey / during the bus ride.

This sounds a bit more specific than just En el autobús, which simply means on the bus or in the bus. Compare:

• Durante el trayecto en autobús = during the bus journey
• En el autobús = on the bus

So the original sentence focuses on what the speaker prefers to do throughout the trip, not just their location.

Trayecto means journey, route, or trip from one place to another.

In this sentence, el trayecto en autobús is the bus ride or bus journey.

It is a fairly common word, but in everyday speech people might also say things like:

• durante el viaje en autobús = during the bus trip
• en el bus / autobús = on the bus

Trayecto often sounds a little more like the stretch of travel between two points.

In Spanish, the usual way to say by bus is en autobús.

Spanish commonly uses en with forms of transport:

• en autobús = by bus
• en tren = by train
• en coche = by car
• en avión = by plane

So el trayecto en autobús is the natural way to say the journey by bus.

After preferir, Spanish normally uses an infinitive when talking about preferring to do something.

So:

• prefiero escuchar música = I prefer to listen to music
• prefiero no mirar el móvil = I prefer not to look at my phone

This is similar to English I prefer to listen.

Using a gerund like escuchando would not work here. Spanish does not say prefiero escuchando.

Prefiero is the first person singular present tense of preferir:

• yo prefiero = I prefer

Preferir is a stem-changing verb in the present tense:

• prefiero
• prefieres
• prefiere
• preferimos
• preferís (Spain)
• prefieren

Notice the change from e to ie in most forms, but not in preferimos or preferís.

Because no is negating the infinitive mirar.

So:

• prefiero escuchar música y no mirar el móvil = I prefer to listen to music and not look at my phone

This is very natural in Spanish. The no goes directly before the verb it negates:

• prefiero no hablar = I prefer not to talk
• decidió no ir = he/she decided not to go

Because escuchar música and mirar el móvil are just infinitive verb phrases acting as the things the speaker prefers.

After preferir, Spanish can directly follow with an infinitive:

• Prefiero comer en casa.
• Prefiero estudiar por la mañana.
• Prefiero escuchar música.

You do not need a preposition like a here.

In Spanish, it is very common to use the definite article with everyday objects, especially when speaking in a general or familiar way.

So mirar el móvil means look at the phone / look at my phone in context.

Spanish often uses the article where English would use a possessive:

• Me duele la cabeza. = My head hurts.
• Lávate las manos. = Wash your hands.
• Miro el móvil. = I look at my phone.

Here, el móvil sounds natural and idiomatic.

Yes, móvil is the normal word in Spain for mobile phone / cell phone.

In much of Latin America, people more often say:

• celular
• sometimes móvil, depending on the country

So if you are learning Spanish from Spain, el móvil is exactly the word you would expect.

Mirar means to look at, while ver means to see.

In this context, mirar el móvil is the natural choice because the idea is actively looking at the phone screen.

Compare:

• mirar el móvil = to look at the phone
• ver el móvil = to see the phone

If you are talking about checking, watching, or looking at your phone, mirar is much more natural.

Yes, but it changes the meaning slightly.

• mirar el móvil = look at the phone / check the phone
• usar el móvil = use the phone

In the original sentence, mirar el móvil suggests specifically looking at the screen, which fits well with the idea of choosing to listen to music instead.

If you said prefiero escuchar música y no usar el móvil, that would mean I prefer to listen to music and not use my phone, which is broader.

The phrase Durante el trayecto en autobús is an introductory time expression at the beginning of the sentence.

In Spanish, it is common to put a comma after a longer introductory phrase:

• Durante el trayecto en autobús, prefiero escuchar música...

The comma helps separate the setting from the main clause. It is not absolutely always required in every short phrase, but here it is very natural and good punctuation.

Yes. A more casual version might be:

• En el autobús, prefiero escuchar música y no mirar el móvil.
• Cuando voy en autobús, prefiero escuchar música y no mirar el móvil.

The original sentence is completely natural, but trayecto sounds a little more formal or descriptive than very everyday conversation. A native speaker would understand all of these easily.