After a de-mob happy last session for sitting MPs, Suu Kyi congratulated her political opponents on "opening the road" for her party, which won a November election in a landslide.
The five-year term ended today for the parliament that has fundamentally changed Myanmar's political landscape, delivered a shot in the arm to the economy and greater freedoms to society.
"I believe we can all co-operate for our country and people, whether it is outside or inside the parliament," said Suu Kyi, who was held captive for more than 15 years by the army.
Her National League for Democracy (NLD) lawmakers will take their seats for the first time on Monday.
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The back-slapping mood was in stark contrast to the acrimony and repression that characterised the junta years.
For decades Myanmar was seen as a basket-case run by paranoid generals who sunk the economy, crushed dissent and cut the Southeast Asian nation off from the rest of the world.
But reforms since 2011 steered by President Thein Sein have overhauled the country and culminated in the NLD election victory.
Yet today in a once unthinkable atmosphere of collaboration, MPs took to the stage to belt out farewell songs as more than a thousand lawmakers old and new tucked into a slap-up meal in a grand hall after the closing session.
Khin Aung Myint, the outgoing upper house speaker, was given an enthusiastic round of applause for his performance of a local favourite called "Village Policy".
The outgoing ruling party heavyweight had earlier given a joke-laden speech to the final session of the combined houses of parliament.
He will remain in his post until the end of March, while the NLD will control the new parliament set to sit for the first time on February 1.