Перед поездкой стоит перепроверить паспорт и билеты.

Because after the preposition перед when it means before, Russian uses the instrumental case.

• поездка = trip
• перед поездкой = before the trip / before a trip

So:

• nominative: поездка
• instrumental: поездкой

This is a very common pattern:

• перед экзаменом = before the exam
• перед встречей = before the meeting
• перед сном = before sleep / before going to bed

Literally, стоить is a different verb from стоять.

• стоять = to stand
• стоить = to cost; in some patterns, to be worth

In this sentence, стоит + infinitive means:

• it is worth doing
• it’s a good idea to
• one should

So стоит перепроверить means something like:

• it’s worth double-checking
• you should double-check

This is a very common and natural structure in Russian.

Because Russian often uses the pattern:

• стоит + infinitive

to say that an action is advisable or worthwhile.

Examples:

• Стоит подождать. = It’s worth waiting.
• Стоит проверить адрес. = It’s worth checking the address.
• Перед поездкой стоит перепроверить паспорт и билеты. = Before the trip, it’s worth double-checking your passport and tickets.

This structure is impersonal: it does not directly say you should, but that is often the natural English meaning.

• проверить = to check
• перепроверить = to check again / double-check / re-check

The prefix пере- often adds the idea of again or over.

So here перепроверить suggests that checking once may not be enough; you should verify everything carefully again before traveling.

Compare:

• Проверь билет. = Check the ticket.
• Перепроверь билет. = Double-check the ticket.

Перепроверить is the perfective form, while перепроверять is imperfective.

Here the speaker means a single complete action to do before the trip:

• Before the trip, it’s worth double-checking...

That is why perfective перепроверить is natural.

Very roughly:

• перепроверять = to be double-checking / to double-check repeatedly or in general
• перепроверить = to double-check once and complete it

Since the sentence is about one recommended completed action before departure, perfective fits best.

This is just based on normal real-life expectations:

• usually a person has one passport
• but possibly multiple tickets: plane tickets, train tickets, return tickets, tickets for several travelers, etc.

So:

• паспорт = passport
• билеты = tickets

There is nothing grammatically strange here. Russian is simply naming the things you should check.

Not necessarily. Билет / билеты can refer to tickets in a broad sense:

• paper tickets
• electronic tickets
• travel tickets
• booking documents, depending on context

In modern usage, even if the ticket is digital, Russian still often uses билет.

So in this sentence, билеты could include train tickets, plane tickets, or similar travel documents.

Yes. Russian often leaves out possessive words like my, your, his, etc. when the meaning is obvious from context.

So:

• перепроверить паспорт и билеты

naturally means:

• double-check your passport and tickets

Russian does not need to say свой паспорт и свои билеты unless there is a reason to emphasize ownership or contrast.

Yes. Russian word order is flexible, although different orders may sound more or less natural depending on emphasis.

The original sentence:

• Перед поездкой стоит перепроверить паспорт и билеты.

is very natural because it starts with the time context: before the trip.

Other possible orders include:

• Стоит перед поездкой перепроверить паспорт и билеты.
• Паспорт и билеты стоит перепроверить перед поездкой.

These are understandable, but the original version sounds smooth and neutral.

It can be either, depending on context.

Russian does not have articles like the or a, so перед поездкой could mean:

• before the trip
• before a trip
• before traveling

The exact meaning comes from the situation. If people are talking about a specific planned journey, English would usually say before the trip.

Yes, absolutely. That is one of the important nuances here.

Перед поездкой стоит перепроверить паспорт и билеты sounds like:

• a recommendation
• practical advice
• a sensible precaution

It is softer than a direct imperative such as:

• Перед поездкой перепроверьте паспорт и билеты. = Double-check your passport and tickets before the trip.

So стоит makes the sentence sound less bossy and more like helpful advice.

Because Russian often uses impersonal constructions, especially with words like стоит, можно, нужно, нельзя.

Here the sentence does not explicitly say you. Instead, it says something like:

• It is worth double-checking...

This is normal in Russian.

Similar examples:

• Нужно подождать. = It’s necessary to wait.
• Можно войти. = You may come in. / It is possible to enter.
• Стоит позвонить заранее. = It’s worth calling in advance.

So the lack of a subject is completely natural.