O'Reilly said the radio show, which he launched in May 2002, will end "in the first quarter of next year." Most of the time he saves, he said, will go into his top-rated Fox News Channel show.
"The media business is getting more and more intense," O'Reilly said Thursday. "We've got to keep the TV show at the level we have it now, and that means more and more time to keep it competitive and fresh. I've been working 60, 65 hours a week and I just can't keep doing that."
Nationally, O'Reilly's radio show is carried on 430 stations, including WOR (710 AM) in New York). Talkers magazine estimates his weekly audience at more than 3.5 million, putting him in the national top 10, and while no official figures are available on advertising, executives close to the show described it as very profitable.