The other bus careened off the interstate early Tuesday in Alabama and down a ravine before toppling onto its side.
The driver of the bus was reportedly killed, while others sustained a wide range of injuries.
The bus that returned to the school later in the day was driven past a throng of reporters and into a part of the school campus out of public view.
The bus driver, Harry Caligone, died in the 5:30 a.m. Tuesday crash that shut down I-10 for hours. The agency's records don't indicate fault. Many others were injured. Another bus carrying students was ahead of the bus that crashed at the time. A family member told the news station they'd been travelling home from a field trip to Disney.
The bus struck a bridge support when it landed in the ravine, and inspectors need to make sure the bridge is sound before reopening the interstate, said Alabama State Trooper Capt. John Malone.
About 45 people were on board the bus, authorities have said. Malone said the bus veered across the median into the eastbound lane before shooting back into the grass median and driving off the ravine.
At least nine people remain hospitalized following the crash of a charter bus carrying members of a high school band from Texas.
Channelview-based Pastor Christopher Shackelford told AL.com that while some are still in serious condition, one girl underwent surgery on a fractured arm, while the band director, who was trapped in the wreckage for more than three hours, is "no longer in critical condition".
In a statement, First Class Tours said: "Our prayers are with the injured and their families at this time".
The last victim was extricated from the crash shortly before 9 a.m. (10 a.m. ET), Mack said. First Class Tours Inc., the bus operator, identified Caligone as a longtime driver with the company.
Injured passengers were taken to hospitals in Baldwin County as well as Sacred Hospital in Pensacola, Florida, Piggott said.
In a statement posted to its website, Sacred Heart Hospital, in Pensacola, Florida, said it received 20 patients from the crash, 15 of whom were treated and released.
The students had just performed at Walt Disney World in Orlando and were on their way home to Texas on two buses when one of them crashed, CNN reported, citing Channelview Independent School District Superintendent Greg Ollis as saying.
Baldwin County Sheriff's Office Major Anthony Lowery said the bus plunged off Interstate 10 into a deep ravine Tuesday morning, and multiple helicopters are responding. The crash happened at about 5:30 a.m., crunching the bus and leaving the passengers exposed to chilly temperatures.