Hantuchova's third career title took her earnings this year to more than $1 million.
Victory also earned her the final place in the eight-player field for the WTA Championships in Madrid from November 6. She ended the race with the same number of points as Maria Sharapova, who also qualified when Venus Williams withdrew after suffering dizziness at the US Open. The American is still undergoing tests to determine the cause.
It was Hantuchova's fourth final of the year and her second title, after she defeated Svetlana Kuznetsova to win Indian Wells and lost in Bali to Lindsay Davenport and to Ana Ivanovic in Luxembourg.
Federer wins title
Roger Federer won his seventh tournament of the season, beating unseeded Finn Jarkko Nieminen 6-3, 6-4 to successfully defend his hometown title, reports Reuters from Basel.
Federer's latest victory guarantees that the Swiss will finish the season as world number one for a fourth consecutive year.
Federer had not dropped a single set in any of his previous seven meetings with the world number 29 and Sunday's Swiss Indoors final proved predictably straightforward.
A single break of the Finn's serve at the start of the opening set and another late in the second saw Federer comfortably wrap up his 52nd career title and his third on home soil.
Murray triumphs
Briton Andy Murray crushed Spaniard Fernando Verdasco 6-2 6-3 in the final of the St Petersburg Open on Sunday to win his second title of the year on his debut appearance in Russia's second city.
The second seed broke Verdasco twice in each set to earn a comfortable victory for the third title of his career.