Prime Minister Prayut Chan-o-cha will visit Myanmar on Oct 9 and 10 and then attend the Asia-Europe Meeting (Asem) in Italy on Oct 16 and 17.
Government spokesman Yongyuth Mayalarp said the prime minister's foreign affairs team had confirmed the two schedules.
The trip to Myanmar is in response to an invitation from Nay Piya Taw in its capacity as the current chair of the Association of Southeast Asian Nations (Asean).
It was earlier reported that Gen Prayut would call on Myanmar President Thein Sein in Nay Pyi Taw and meet Thai people in Yangon.
The trip to attend Asem in Milan, Italy, is also in response to an invitation. It will be an important trip for the prime minister, who heads the National Council for Peace and Order that staged the May 22 coup, as leaders of Asian and European countries will be there.
It was reported that Gen Prayut will explain the situation and facts about Thailand if there are any relevant inquiries.