Pri otkazivanju leta provjerite broj leta.

Here pri means something like during, when, on the occasion of, or in the process of.

So Pri otkazivanju leta means roughly:

• when cancelling a flight
• during flight cancellation
• in case of flight cancellation
  depending on context

In Croatian, pri is often used with the locative case to express a situation or circumstance in which something happens.

Otkazivanju is the locative singular form of the verbal noun otkazivanje.

• base verb: otkazivati / otkazati = to cancel
• verbal noun: otkazivanje = cancelling / cancellation
• locative singular: otkazivanju

It is in the locative because the preposition pri requires the locative case.

So:

• otkazivanje = cancellation / cancelling
• pri otkazivanju = during cancellation / when cancelling

Leta is the genitive singular form of let (flight).

It appears twice in the sentence for two different reasons:

1. otkazivanje leta
   The verbal noun otkazivanje takes its object in the genitive here, so leta means of the flight.

2. broj leta
   This is a very common noun + genitive structure meaning flight number literally number of the flight.

So both instances of leta are genitive singular.

Literally, it means cancelling of the flight or cancellation of the flight.

In natural English, depending on context, you might translate it as:

• when cancelling a flight
• during flight cancellation
• in the event of flight cancellation

Croatian verbal nouns like otkazivanje are very flexible and often sound more natural in Croatian than a direct noun-for-noun English translation would.

Provjerite is the imperative form of provjeriti (to check / verify) for:

• 2nd person plural: you all check
• or formal singular: please check

In instructions, notices, announcements, and official language, Croatian often uses this form to address the reader politely or generally.

So provjerite broj leta means:

• check the flight number
• please check the flight number

It can also be the present tense form for you (plural/formal) check, depending on context.

But in this sentence, it is most naturally understood as an imperative, because the whole sentence gives an instruction:

Pri otkazivanju leta provjerite broj leta.
= When cancelling a flight, check the flight number.

So here it functions like a command or instruction, not a simple statement.

Croatian does not have articles like a, an, or the.

So:

• let can mean a flight or the flight
• broj leta can mean a flight number or the flight number

You understand which one is meant from context.

That is why the sentence can translate naturally into English in more than one way, even though the Croatian wording stays the same.

It literally means number of the flight.

This is a common Croatian structure:

• broj = number
• leta = of the flight

Together: flight number

This is very similar to other Croatian noun phrases where the second noun goes into the genitive.

Croatian word order is relatively flexible. Putting Pri otkazivanju leta first sets the scene:

• during flight cancellation
• when cancelling a flight

Then the main instruction follows:

• provjerite broj leta = check the flight number

This order is natural because it first gives the circumstance, then the action to take.

Yes. Croatian has several ways to express a similar idea. For example:

• Prilikom otkazivanja leta provjerite broj leta.
• Kod otkazivanja leta provjerite broj leta.

These are similar, though pri and prilikom often sound especially natural in formal instructions.

The original sentence is concise and fits notice-style or instructional language well.

The noun otkazivanje is connected to the imperfective verb otkazivati.

Croatian often forms verbal nouns like this from imperfective verbs because they describe a process or ongoing action:

• otkazati = perfective, to cancel (completed action)
• otkazivati = imperfective, to be cancelling / to cancel repeatedly or in process
• otkazivanje = cancelling / cancellation

That is why pri otkazivanju leta has the sense of during the act/process of cancellation rather than focusing on a single completed event.