Seuraavalla matkalla haluan taas ikkunapaikan, vaikka tällä kertaa käytäväpaikka oli kätevämpi.

Seuraavalla matkalla is in the adessive case, marked here by -lla.

In this sentence, the phrase means on the next trip or during the next trip.

A few useful points:

• matka = trip, journey
• matkalla = on a trip / during a trip
• seuraava = next
• seuraavalla = next, in the same case as matkalla

So seuraavalla matkalla is literally something like on the next trip.

Finnish often uses the adessive for time expressions too, not just physical location. Compare:

• ensi viikolla = next week
• kesällä = in summer
• seuraavalla matkalla = on the next trip

Also notice that the adjective seuraava agrees with the noun matka, so both get the same case ending:

• seuraava matka
• seuraavalla matkalla

Because ikkunapaikan is the object of haluan.

The verb haluta = to want, and in Finnish the object often changes form depending on whether it is seen as a whole, complete thing or not.

Here, the speaker wants one whole seat, so Finnish uses the total object. In the singular, that usually looks like the genitive form, ending in -n:

• ikkunapaikka = a window seat
• haluan ikkunapaikan = I want a window seat

This is very common with countable things:

• haluan kirjan = I want a book
• otan kahvin = I’ll take a coffee

Compare that with cases where Finnish uses the partitive instead:

• haluan kahvia = I want some coffee
• en halua ikkunapaikkaa = I do not want a window seat

So in this sentence, ikkunapaikan is natural because the speaker means a specific complete thing: a window seat.

Here taas means again.

So haluan taas ikkunapaikan means: I want a window seat again.

The nuance is that the speaker is returning to a previous preference. This time the aisle seat turned out to be more convenient, but next time they still want the window seat again.

Depending on context, taas can sometimes also feel a bit like:

• again
• once more
• back to

It is a very common word in everyday Finnish.

Here vaikka means although or even though.

It introduces a concessive clause: a clause that presents a fact that does not change the main point.

So the structure is:

• Seuraavalla matkalla haluan taas ikkunapaikan
• vaikka tällä kertaa käytäväpaikka oli kätevämpi

In other words:

I want a window seat again on the next trip, even though this time the aisle seat was more convenient.

Important: vaikka can mean different things in different contexts, such as:

• although / even though
• even if
• sometimes in speech, something like for example

But in this sentence, it clearly means although / even though.

Tällä kertaa is the normal, idiomatic way to say this time.

It is best learned as a fixed expression.

Forms:

• tällä = adessive form of tämä = this
• kertaa = partitive of kerta = time, occasion

So even though the cases may look surprising, tällä kertaa is simply the standard expression for this time.

There is also tällä kerralla, and it can be possible in some contexts, but it often sounds more like:

• on this particular occasion
• at this specific time/round

For a general this time, learners should normally use tällä kertaa.

Because Finnish very often uses the present tense to talk about the future when the time reference is already clear.

Here the future is clear from seuraavalla matkalla = on the next trip.

So:

• haluan literally = I want
• but in context it means I will want / I want next time

Finnish does this all the time:

• Menen huomenna = I’m going tomorrow
• Tulen ensi viikolla = I’ll come next week

The second clause uses oli because it refers to the already experienced situation this time:

• tällä kertaa käytäväpaikka oli kätevämpi
• this time the aisle seat was more convenient

So the sentence contrasts:

• a future preference: haluan
• with a past experience: oli

Kätevämpi is the comparative form of kätevä.

• kätevä = convenient, handy
• kätevämpi = more convenient

Finnish usually forms this kind of comparative with -mpi.

So:

• käytäväpaikka oli kätevämpi = the aisle seat was more convenient

More convenient than what?
In this sentence, that is understood from context: more convenient than the window seat.

Finnish does not always have to say the comparison explicitly if it is obvious.

If you wanted to say it fully, you could say:

• käytäväpaikka oli kätevämpi kuin ikkunapaikka

Here:

• kuin = than

So the sentence leaves out kuin ikkunapaikka because the listener can easily understand it.

Yes. Both are very typical Finnish compound nouns.

They are built like this:

• ikkuna
  • paikka → ikkunapaikka
• käytävä
  • paikka → käytäväpaikka

Meanings:

• ikkuna = window
• käytävä = aisle
• paikka = place, seat, spot

So:

• ikkunapaikka = window seat
• käytäväpaikka = aisle seat

In Finnish, the last part of the compound is the main noun, and case endings are added to the whole compound:

• ikkunapaikka
• ikkunapaikan

That is why the -n appears at the end of the whole word, not in the middle.

Because vaikka tällä kertaa käytäväpaikka oli kätevämpi is a subordinate clause, and Finnish normally separates a main clause and a subordinate clause with a comma.

So the structure is:

• main clause: Seuraavalla matkalla haluan taas ikkunapaikan
• subordinate clause: vaikka tällä kertaa käytäväpaikka oli kätevämpi

That is why the comma is there.

This is standard Finnish punctuation:

• Tulen, jos ehdin.
• Lähdin, vaikka satoi.
• Haluan taas ikkunapaikan, vaikka tällä kertaa käytäväpaikka oli kätevämpi.

Yes, Finnish word order is quite flexible, and this sentence uses a very natural order to highlight the time frame first.

By starting with Seuraavalla matkalla, the speaker sets up the contrast immediately:

• next trip → I want a window seat again
• this time → the aisle seat was more convenient

So the sentence is organized in a very meaningful way:

1. future situation
2. speaker’s preference
3. contrasting information

A more English-like order would also be possible in some contexts, but this version sounds natural and clear in Finnish.

The fronted time expression Seuraavalla matkalla gives the sentence a strong frame: as for the next trip...

So the word order is not strange; it is a normal Finnish way to emphasize what the sentence is about.