From Warszawa (Poland) to Vilnius (Lithuania) is a seat reservation mandatory, but it is impossible to book it via Interrail in general for Lithuania. The ticket overall would cost about 30€. Is it possible to only buy the seat reservation at the train station in Warszawa?
Same problem for Vilnius to Riga (latvia).
From Riga to Tallin (Estonia) there is no mandatory seat reservation, so it should be possible to use the Interrail pass as usual?
Question
how to use the interrail ticket from Poland to Lithuania and Latvia (and Estonia)?
You can book online, see this overview:
https://www.seat61.com/interrail-and-eurail-reservations.htm
Interrail is often not the best (or cheapest) place to book reservations.
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