Mặc dù chuyến bay đã đến nhưng hành lý chưa đến.

Yes, it is very much like although ... but ..., and that is normal in Vietnamese.

• mặc dù introduces the concessive idea: although / even though
• nhưng introduces the contrast: but

So Vietnamese often uses the pair:

• Mặc dù A, nhưng B.

This is a very common structure.
Unlike standard English, where although ... but ... is usually considered redundant, Vietnamese often keeps both parts for clarity and balance.

You may also see one part omitted in some contexts:

• Mặc dù chuyến bay đã đến, hành lý chưa đến.
• Chuyến bay đã đến nhưng hành lý chưa đến.

All of these are possible, but the full pair sounds very natural.

đã is an aspect marker that often shows that something has already happened or was completed before now.

So:

• đến = arrive
• đã đến = has arrived / already arrived

Vietnamese does not conjugate verbs the way English does, so words like đã, đang, and sẽ help express time and aspect.

In this sentence, đã đến tells you the flight’s arrival is already completed.

Because chưa means not yet, which is different from plain negation.

• chưa đến = has not arrived yet
• không đến = does not arrive / did not come / will not come, depending on context

Here the idea is that the luggage is expected to arrive, but it has not done so yet. That is exactly what chưa expresses.

A useful contrast:

• đã đến = already arrived
• chưa đến = not yet arrived

These two forms work very naturally together in this sentence.

It is repetitive in form, but completely natural.

Vietnamese often repeats the same verb if it applies to two different subjects:

• chuyến bay đã đến = the flight has arrived
• hành lý chưa đến = the luggage has not arrived yet

English sometimes avoids repetition more than Vietnamese does, but in Vietnamese this sounds clear and normal.

You could replace the second đến with tới in some situations:

• ... nhưng hành lý chưa tới.

That is also natural, though the original sentence is perfectly fine.

chuyến bay is the normal noun for flight.

It is made of:

• chuyến = trip, journey, run, service, occurrence of a trip
• bay = fly / flight-related

Together, chuyến bay means a flight as a scheduled trip.

This is different from:

• máy bay = airplane

So:

• chuyến bay = the flight
• máy bay = the aircraft / plane

That distinction is important.

hành lý is a collective noun meaning luggage / baggage, so it often works without any plural marking.

Vietnamese nouns usually do not have singular/plural endings like English nouns do. Context tells you whether you mean one item or several items.

So hành lý can refer to baggage in general, not necessarily one suitcase.

If you wanted to be more specific, you could say things like:

• các kiện hành lý = the pieces of luggage
• va li = suitcase(s)

But in normal airport situations, hành lý is exactly the natural word.

The structure is:

• Mặc dù
  • clause 1
• nhưng
  • clause 2

More specifically:

• Mặc dù chuyến bay đã đến
• nhưng hành lý chưa đến

Each clause has a subject and a predicate:

1. chuyến bay = subject
   đã đến = predicate

2. hành lý = subject
   chưa đến = predicate

So the whole sentence is built from two full clauses linked by contrast.

Often yes.

Both đến and tới can mean arrive or reach. In many everyday contexts, they are interchangeable.

So you may hear:

• chuyến bay đã tới
• hành lý chưa tới

However, đến is often a little more neutral and widely used in formal or standard contexts. In airport-style announcements or textbook sentences, đến is very common.

So your original sentence sounds completely natural and standard.

A comma is often used, but not absolutely required in short, simple sentences.

You may see:

• Mặc dù chuyến bay đã đến, nhưng hành lý chưa đến.

or

• Mặc dù chuyến bay đã đến nhưng hành lý chưa đến.

Both are acceptable.
The comma helps mark the pause between the two clauses, especially in writing. In a short sentence like this, omitting it is also common.

Yes, you could say:

• Mặc dù chuyến bay đã đến rồi nhưng hành lý chưa đến.

Adding rồi can emphasize that the action is completed or that the speaker sees it as already the case.

Compare:

• đã đến = has arrived
• đã đến rồi = has already arrived / has arrived already

The version without rồi is slightly cleaner and more neutral. The version with rồi may sound a bit more conversational or emphatic.

Vietnamese does not map exactly onto English tense labels like past or present perfect.

Instead, it uses context plus markers such as:

• đã = completed/already
• chưa = not yet

In this sentence, the meaning is roughly like English present relevance:

• the flight has already arrived
• the luggage has not arrived yet

So in English, the most natural translation often uses has arrived / hasn’t arrived yet, but Vietnamese itself is not using a special present perfect verb form. It is using aspect markers and context.