The trade includes a swap of late-round picks, the source said.
The move reunites Ingram with the team that drafted him in 2011 and where he played eight seasons.
Ingram was the Texans’ lead back this season, running for 294 yards and a touchdown on 92 carries on a team that ranks last in the NFL, according to Football Outsiders’ DVOA.
With his trade to New Orleans, the Texans now have four running backs on their roster: veterans David Johnson, Phillip Lindsay and Rex Burkhead and second-year pro Scottie Phillips. Phillips has been inactive for all but one game this season, but just played on special teams.
ESPN’s Sarah Barshop contributed to this report.