Just booked a ticket for EC 140 from budapest to vienna at OBB site....the site did not allow me to add reservation ...i am worried about the fact now that whether I will get a seat without reservation.....and can i add reservation later to ensure a seat ...i have booked ticket for 23rd april
If you don't get a dead certain answer, then when you get to Budapest, just go to Keleti and go down stairs to the ticket office and ask them what to do. I'm not a big train guy so I can be assured I would tell you correctly. Also see if this helps: https://community.ricksteves.com/travel-forum/transportation/ic-ec-train-seat-reservation
I recently booked tickets for two on EC145 Vienna to Budapest and there was no place to select specific seats on OBB site, although I did pay €3 extra for each seat -- but when I printed my tickets there was a sheet headed "reservierung" showing the car # (wagen) and seats (sitzplatze) On a prior trip, going the other direction, I did what James E suggests and bought reservations at Keleti station the day before.
thanks both....wanted to check if reservations can be made a day prior at Keleti considering the rush there in April
Answer I believe is yes