LOS ANGELES — “The Avengers” is taking a page out of Superman’s comic book — flying faster than a speeding bullet to the billion-dollar mark at the box office.

The superhero blockbuster took in $103.2 million to lead for the second consecutive weekend, raising its domestic total to $373.2 million, according to studio estimates Sunday.

With $95.4 million more overseas, “The Avengers” lifted its international receipts to $628.9 million and a worldwide haul of just over $1 billion, only 19 days after it began rolling out in some markets.

“You never think that it can happen this quickly,” said Dave Hollis, head of distribution for Disney, whose Marvel Studios unit produced the ensemble film after a long buildup in its solo superhero outings.

“The Avengers” easily fended off Johnny Depp and Tim Burton’s vampire romp “Dark Shadows,” which had a so-so domestic start of $28.8 million to finish a distant No. 2.

That’s far below such previous Depp-Burton collaborations as “Alice in Wonderland,” which opened with $116.1 million, and “Charlie and the Chocolate Factory,” which debuted with $56.2 million.

“The Avengers” was the first movie to pull in more than $100 million domestically in its second weekend, passing the previous best of $75.6 million for “Avatar.”

The film also topped $300 million domestically Saturday after nine days in release, beating the record set by “The Dark Knight,” which hit that mark in 10 days.

Already the year’s biggest hit worldwide, “The Avengers” is on the verge of passing “The Hunger Games” at $386.9 million to become the top-grossing film domestically for 2012.