Какой бы маршрут мы ни выбрали, я всё равно выйду пораньше, чтобы не спешить.

This is a concessive pattern in Russian. It means something like:

Whichever route we choose / No matter which route we choose

The whole pattern is:

какой бы ... ни + verb

It expresses the idea that the main result stays true regardless of the choice or condition.

So here:

Какой бы маршрут мы ни выбрали, ...
= Whichever route we choose, ...

Because маршрут is the direct object of выбрать, and with inanimate masculine nouns in the singular, the accusative looks exactly like the nominative.

So:

• nominative: маршрут
• accusative: маршрут

Even though it is the object, its form does not change here.

If the noun were different, you might see a clearer accusative form. For example:

• какую книгу мы выберем = which book we choose

There, книга changes to книгу.

This is because Russian uses the past tense form + бы to express hypothetical or non-factual meaning, similar to English would constructions.

So выбрали here is not a normal past tense meaning chose. In this structure, it functions more like:

• if we chose
• were to choose
• we might choose

In other words, бы changes the feel of the verb from plain past into a hypothetical or dependent form.

Бы is a particle that often marks hypothetical, conditional, or non-indicative meaning.

In this sentence, it helps create the idea of an unspecified possible choice:

• какой маршрут мы выбрали = which route we chose
• какой бы маршрут мы ни выбрали = whichever route we choose / no matter which route we choose

So бы is essential to the concessive meaning here.

In this kind of construction, ни works together with бы and an interrogative word like какой, кто, где, когда to mean no matter... or whichever...

Common patterns include:

• кто бы ни... = whoever
• что бы ни... = whatever
• где бы ни... = wherever
• как бы ни... = however
• какой бы ... ни... = whichever / no matter which

So ни is part of the fixed pattern, not simple negation.

Всё равно means all the same, anyway, or in any case.

Here it emphasizes that the speaker’s action does not depend on which route gets chosen:

Какой бы маршрут мы ни выбрали, я всё равно выйду пораньше...
= Whichever route we choose, I’ll leave early anyway...

It reinforces the concessive meaning of the first clause.

Выйду is the future tense of the perfective verb выйти, which means a single completed action: I will go out / leave.

That fits the sentence well, because the speaker is talking about one concrete future action: leaving earlier.

Compare:

• я выйду пораньше = I’ll leave a bit earlier
• я буду выходить пораньше = I’ll be leaving earlier / I’ll have the habit of leaving earlier

The second version sounds more repeated, habitual, or process-focused, so it is less natural here.

Пораньше means a bit earlier or somewhat earlier. It often sounds softer and more natural in everyday speech when talking about adjusting time slightly.

Compare:

• раньше = earlier
• пораньше = a little earlier / rather early

So:

• я выйду раньше = I’ll leave earlier
• я выйду пораньше = I’ll leave a bit earlier

In this sentence, пораньше sounds conversational and natural.

After чтобы, Russian often uses an infinitive when the subject is the same as in the main clause.

Here the subject of both actions is я:

• я выйду пораньше
• я не буду спешить / мне не придётся спешить

So Russian naturally says:

я выйду пораньше, чтобы не спешить
= I’ll leave a bit earlier so as not to rush

This is very common. If the subject were different, Russian would more often use a finite verb:

• Я напомнил ему, чтобы он не спешил.
  = I reminded him so that he wouldn’t rush.

Yes, literally спешить means to hurry or to rush, so не spешить means not to hurry / not to rush.

Depending on context, English could translate it as:

• so I don’t have to rush
• so as not to rush
• so I won’t be in a hurry

All of those fit the basic Russian meaning.

Yes, Russian word order is flexible, though each version has a slightly different emphasis.

The original sentence is very natural:

Какой бы маршрут мы ни выбрали, я всё равно выйду пораньше, чтобы не спешить.

You could also say:

Я всё равно выйду пораньше, какой бы маршрут мы ни выбрали, чтобы не спешить.

But the original is better because it first presents the regardless-of-condition idea, then the main decision.

Also, всё равно is usually placed near the main verb or main statement because it modifies the whole main clause.

Because Какой бы маршрут мы ни выбрали is a subordinate clause, and in Russian subordinate clauses are normally separated by commas.

So the structure is:

• subordinate concessive clause: Какой бы маршрут мы ни выбрали
• main clause: я всё равно выйду пораньше, чтобы не спешить

There is also a comma before чтобы, because чтобы не спешить is another subordinate clause of purpose.

It is neutral and very natural. It works well in both everyday speech and standard written Russian.

A few parts make it sound especially natural and idiomatic:

• какой бы ... ни = standard, natural concessive pattern
• всё равно = very common in speech
• пораньше = slightly conversational, but completely standard
• чтобы не спешить = common purpose construction

So overall, this is a normal, idiomatic Russian sentence.