Use DB for a ticket as far as Poznan. The last bit is done by a regional train (Koleje Wielkopolskie), just buy a separate ticket for it on https://bilet.wielkopolskiebilety.pl/ (32 PLN or 7.30€). The website is in Polish but you can translate it using Google.

If you don’t want to have a tight connection in Berlin add a 1h stopover during your search on bahn.com or DB Navigator app. Good journey example (might depend on works on your date) :

• IC Kolding - Hamburg Hbf 09:18 - 12:05
• ICE Hamburg Hbf - Berlin Hbf (tief) 12:34 - 14:20 (or 13:36 - 15:22)
• EC Berlin Hbf - Poznan Gl. 15:52 - 18:51
• R Poznan Gl. - Ostrow Wielkopolskie 19:08 - 20:39

Kolding - Poznan often costs 56.90-59.90€ while the last train has a fixed price (32 PLN/7.30€).

Questions welcome :)

Thank you for your responce, I tried and there is something wrong altso like there is connection but I can not buy it

Looks like the EC from Berlin is not yet available to buy. PKP (Polish state operator) is always late.

If you click on the train DB will tell you that "train cannot be reserved at the moment".

Check back in a few days. Their limit is usually 30 days before but with the timetable change it could be less than that...

ok, i will. thank you

Hi again, I was trying again with oebb and db, but still not possible to buy tickets on this line.

Do yuo know any other websites where I could buy these tickets?

Reservations for the ECs from Berlin to Poland cannot be bought online. Unless you count booking on interrail.eu, having it sent by the post, waiting for it, and paying a premium for that.

In the mean time, reservations are open now.

So either go to a ticket office or book by phone. You can call DB (+49 30 311 682904) and pick your reservation up when you get to Germany or maybe DSB can also book it.

Note: you don't want to book a ticket since you already have one: your pass. You need a reservation.

I believe this is @viking's only journey so a pass won't be good value in my opinion.

@rvdborgt I can find available tickets for the EC on intercity.pl but not through DB. Is it only on my side ? I guess they should appear soon there.

No idea what the problem is with DB. I'd expect tickets to be released any moment.

yes, I do not have a pass, because it is only kolding - poz - kolding.

I tried on intercity.pl as well but it was not possible to buy for the 21.12 or 22.12.

does it mean , that there is no conection between these cities? or not possible to buy at one place?

Booking is possible:

What do you mean by "not possible”? Where do you get stuck?

i got stuck here 

https://www.bahn.de/buchung/fahrplan/suche#sts=false&so=Kolding%20st&zo=Poznan%20Gl.&kl=2&r=13:16:KLASSENLOS:1,13:16:KLASSENLOS:1&soid=A%3D1%40O%3DKolding%20st%40X%3D9481525%40Y%3D55490843%40U%3D80%40L%3D8601318%40B%3D1%40p%3D1700511817%40&zoid=A%3D1%40O%3DPoznan%20Gl.%40X%3D16910867%40Y%3D52401997%40U%3D80%40L%3D5100081%40B%3D1%40p%3D1700511817%40&sot=ST&zot=ST&soei=8601318&zoei=5100081&hd=2023-12-21T09:20:07&hza=D&ar=false&s=true&d=false&hz=%5B%5D&fm=false&bp=false

there are no prices after the 14th of december

the prices on the polish site are only ber - poz and are very high compering to prices for the whole trip on db before the 14th of dec