En i reisefølget har DNT-nøkkelen.

Here en means one or one person, not just the article a.

So En i reisefølget means something like one of the people in the travel party.

In other words, the sentence is pointing to one unspecified member of the group.

Yes. Writing Én with an accent is possible when you want to emphasize one.

• En i reisefølget har DNT-nøkkelen = neutral, normal
• Én i reisefølget har DNT-nøkkelen = emphasizes that one particular person in the group has it

The accent is often used to avoid confusion between:

• en = the article a/an
• én = the number/pronoun one

In everyday writing, many people leave the accent out if the meaning is already clear from context.

Yes, in a way. Norwegian often leaves out a noun when it is easy to understand from context.

So En i reisefølget literally looks like One in the travel party, but the understood meaning is:

• one person in the travel party
• one member of the travel party

English does this too sometimes, as in one of us.

Because reisefølget is the definite form: the travel party / the group traveling together.

• et reisefølge = a travel party
• reisefølget = the travel party

In this sentence, the group is already specific and known from context, so the definite form is used.

It is grammatically singular.

• et reisefølge = a travel party
• reisefølget = the travel party

Even though it refers to several people, the noun itself names the group as a single unit. This is similar to English the group or the party.

The preposition i literally means in, but here it expresses membership in the group.

So en i reisefølget means:

• one in the travel party
• more naturally in English: one of the people in the travel party

This is a very natural Norwegian way to say that someone belongs to a group.

Usually, no—not in this exact short form.

En i reisefølget is the natural idiomatic wording.

If you want to use av with one of, Norwegian normally prefers something more explicit, such as:

• en av dem i reisefølget
• en av reisefølgets medlemmer

So for this sentence, en i reisefølget is the best everyday phrasing.

DNT-nøkkelen is a compound noun:

• DNT = Den Norske Turistforening
• nøkkel = key

So DNT-nøkkelen means the DNT key.

The hyphen is used because the first part is an abbreviation/initialism. In Norwegian, compounds with abbreviations often take a hyphen:

• TV-serie
• EU-land
• DNT-nøkkel

Here it is also in the definite form:

• en DNT-nøkkel = a DNT key
• DNT-nøkkelen = the DNT key

Har is the present tense of å ha, meaning to have.

So:

• har = has / have

In this sentence, it shows possession:

• En i reisefølget har DNT-nøkkelen = one person in the group has the key

The sentence has a very standard Norwegian main-clause structure:

• En i reisefølget = subject
• har = verb
• DNT-nøkkelen = object

So the pattern is:

Subject + Verb + Object

This is the normal word order in a simple statement.

Yes. Here en does not mean masculine gender.

In this sentence, en means one person / one member, so it can refer to anyone, regardless of gender.

So the person who has the key could be male, female, or any gender—the sentence does not specify.

Yes, it sounds natural.

It is short, clear, and typical of how Norwegian often expresses group membership. A native speaker would easily understand it as:

• one member of the party has the DNT key

So it is both grammatically correct and idiomatic.