MANILA (Reuters) - Benigno Aquino remained on track on Thursday to become next president of the Philippines, with the election commission and monitors saying flaws in this week's polls were not enough to overturn his landslide victory.

Unofficial tallies from Monday's election show Aquino, scion of a political clan that drove the kleptocratic regime of Ferdinand Marcos from office in 1986, has more than 40 percent of the vote, 15 points ahead of former President Joseph Estrada.