While the centre-right National Coalition of outgoing Finance Minister Petteri Orpo came in second, with 17.2 percent of the advance ballots.
The current government's cuts to Finland's prized education system, and a tightening of unemployment benefit criteria, had provoked loud and widespread public opposition.
They will head a government for the first time in 16 years, though it has been a junior coalition member since then. "Of course, the parties from the last government are going to suffer because of that now", she told AFP.
The success of the Social Democrats would mark a departure for Finland and the region, where leftwing parties have struggled in recent years, yielding some of their hold on the working class vote as nationalist parties have emerged.
However, in a tacit acknowledgement that the public mood has turned against further belt-tightening, Orpo has insisted the economy is now strong enough to allow for some more generous public spending.
A record 1.5 million Finns, over a third of the electorate, had already cast their ballots during a week of advance voting earlier this month.
The center-left Social Democratic Party tops a recent poll with 19% support.
Opinion polls had suggested the Social Democrats' lead was narrowing towards the end of their campaign, with some blaming Rinne's inability to attract large numbers of new, younger voters.
The Finns Party has run a vocal campaign calling for asylum-based immigration to be reduced to nearly zero, and decrying the "climate hysteria" of other parties seeking action against global warming.
Le plus grand avion du monde a fait son premier vol
Stratolaunch a réussi samedi son premier vol d'essai , au-dessus du désert de Mojave, dans le sud de la Californie. Mais le décès de Paul Allen, en octobre 2018, rend incertain l'avenir de cet avion aux dimensions exceptionnelles.
Chairman of the Finns Party Jussi Halla-aho, front right, campaigns for the Finnish parliamentary elections in Tuusula, Finland, Saturday, April 13, 2019, a day ahead of the elections.
"You will be the next prime minister", one woman assured him.
The Finns party's stance on environmental policies, which includes an opposition to a proposed tax on meat consumption, appeals to rural voters in particular who fear soaring fuel costs and resent any efforts to change what they see as the traditional Finnish way of life.
This could make the negotiations to build a government coalition particularly tricky.
During the campaign, most parties expressed strong reservations about sharing a government platform with Halla-aho's party, while stopping short of ruling it out entirely.
Finland has a rapidly ageing population and declining birth rate, and the question of how to keep funding the country´s generous welfare state has been a key election battleground.
However, the two parties have repeatedly clashed over the conservatives' austerity policies during the last four years. Immigration became a hot election topic despite Finland being western Europe's most homogenous country with a foreign-born population of just 6.6 percent.
In January, outrage over highly publicised reports of an alleged string of sexual assaults by immigrant men boosted support for the Finns Party´s anti-immigration agenda. Polls close at 8:00 pm (1700 GMT) with all votes expected to be counted by midnight.
However, non-OPEC states in the group have complied at a rate of 64%, with Russian Federation lagging behind its target cuts. The oil market also followed global stock markets higher after positive corporate earnings results from JP Morgan.
By extending cancellations through the summer now, airline officials said they can plan more reliably for the peak travel season. Park said canceling the flights now will help the airline plan for its busiest travel season of the year, CNBC reported.
Par contre, et c'est étonnant, le père de Kylian affirme qu'il n'a plus de rêves pour son fils dans le futur. Le 15 juillet dernier, l'équipe de France a remporté sa deuxième Coupe du Monde en battant la Croatie 4 à 2.
We'll also share some epic moments from some of our favorite characters including Jon Snow, Daenerys Targaryen and the Hound. Simply log into the HBO Go app (on your smartphone, tablet, console, TV etc.) and select Game of Thrones .
Plusieurs internautes se sont tournés vers Twitter pour signaler le problème et afficher leur mécontentement. Mais les administrations de ces sites n'ont jusqu'à présent pas souhaité communiquer sur l'incident.
The presidency released photos showing Haftar, dressed in a blue suit, sitting with Sisi and his head of intelligence Abbas Kamel. Haftar's push on the capital threatens to further destabilise the oil-rich country, however, and reignite a full-blown civil war.
Rupture des ligaments croisés pour Jovetic — ASM
Mais le Portugais en a rajouté une couche ensuite en conférence de presse. " Je suis en colère ". C'est une question de justice également. "Le maintien va se jouer lors des derniers matchs ".
Tiger Woods wins The Masters for the first time since 2005
But it was still more than enough to give him a one-stroke victory over Dustin Johnson , Brooks Koepke, and Xavier Schauffele. Sunday's thrilling victory puts the former world No.1 just three majors behind the all-time record of Jack Nicklaus .
Falcon Heavy successfully launches Arabsat 6A
When the rocket flew a year ago , its two side boosters made synchronized landings on side-by-side ground pads in Florida. SpaceX's Falcon Heavy took off yesterday from the historic Launchpad 39A at the Kennedy Space Centre in Florida.