Earlier in the day, Orban said he had vetoed 50 billion euros ($54.95 billion) in the European Union's macro-financial aid for Ukraine.
"There will be approximately 75 cases when the Hungarian government will be able to stop this process," Orban told the Kossuth radio broadcaster, adding that the final word on Ukraine's membership must be given by 27 parliaments.
The EU will return to the allocation of macro-financial assistance to Ukraine from its budget at an extraordinary summit in February, he said.
At the same time, Orban explained that allocating money to Kiev was "not in the interests" of Hungary, since in such a case, Budapest would lose part of its money from the bloc's general budget. However, opening EU accession talks with Ukraine itself does not run counter to Hungary's interests, he added.
"The start of EU accession negotiations with Ukraine does not in itself harm Hungarian national interests. We will have the opportunity to interfere later," the Hungarian leader told Kossuth.
Ukraine applied for EU membership on February 28, 2022, shortly after Russia launched its military operation. It was followed by Georgia and Moldova, which decided to fast-track the submission of their applications. On Thursday, the European Council decided to launch EU accession talks with Ukraine and Moldova, and grant EU candidate status to Georgia. Orban then said that Hungary was not involved in the decision to start accession talks with Kiev.