Ankomsthavnen står på billetten.

Ankomsthavnen is a compound noun:

• ankomst = arrival
• havn = harbor / port
• ankomsthavn = arrival port
• ankomsthavnen = the arrival port

So Norwegian often joins nouns together where English would usually use more than one word.

The ending -en is the definite article attached to the noun. In English, you usually put the before the noun, but in Norwegian it is often added to the end.

So:

• en havn = a port
• havnen = the port

And with the compound noun:

• en ankomsthavn = an arrival port
• ankomsthavnen = the arrival port

This tells you the sentence is talking about a specific arrival port.

For the same reason: billetten means the ticket.

Compare:

• en billett = a ticket
• billetten = the ticket

So på billetten means on the ticket.

Literally, yes: står is the present tense of stå, which usually means stand.

But in Norwegian, stå is also commonly used for text or information that appears somewhere. So in this sentence, står is better understood as:

• is written
• is printed
• appears

So Ankomsthavnen står på billetten means something like The arrival port is written on the ticket.

Norwegian often uses stå when talking about words, numbers, or information written in a place.

For example:

• Det står på døra. = It says on the door.
• Navnet står i passet. = The name is written in the passport.

If you used er instead, it would sound less natural in this context. Er på billetten would suggest simple location, but står på billetten is the idiomatic way to say that the information is printed or written there.

The sentence has normal Norwegian main-clause word order:

• Ankomsthavnen = subject
• står = verb
• på billetten = prepositional phrase

So it is:

Subject + Verb + Other information

This is very similar to basic English word order: The arrival port + is written + on the ticket

På usually means on, and it is the natural preposition when something is written or printed on a surface or document.

So:

• på billetten = on the ticket

Using i would usually mean in, which is not the normal choice for printed information on a ticket.

Yes. Norwegian uses compound nouns very often, much like German, and often more freely than English.

Some similar examples:

• flyplass = airport
• ankomsttid = arrival time
• avgangshall = departure hall
• båtbillett = boat ticket

So seeing a long noun like ankomsthavnen is very normal in Norwegian. A useful strategy is to split it into smaller parts and identify the last noun first, since that is usually the main thing being described.

If you wanted an indefinite version, you could say:

• En ankomsthavn står på en billett.

But this sounds less natural in most real situations, because people usually mean a specific ticket and a specific arrival port.

The definite sentence:

• Ankomsthavnen står på billetten.

is much more natural if you are talking about information shown on a particular ticket.

A rough guide for an English speaker would be:

AHN-komst-hahv-nen

A few helpful points:

• ankomst has stress near the beginning
• havn has a vowel somewhat like ah
• the final -en is a short unstressed ending

The exact pronunciation depends somewhat on dialect, but the important thing for learners is recognizing the parts: ankomst + havn + en.