A passenger aboard a United Airlines flight claims he and his wife were forced to sit in a vomit-soaked seat -- and given paper towels to clean it up himself, according to a report.

Texas resident Sam Trail said that when he and his wife boarded United Flight 2057 from Vancouver to Houston on Sunday, he found his seat and the back of the seat in front of him soiled with puke.

"The seat in front of me was covered with vomit," Trail told Click2Houston.com. "They kept boarding the people and so we couldn't move. We basically had our luggage in our laps trying to avoid contact with the vomit."

Trail alleges that he alerted crew members about the disgusting situation, but they were more focused on the flight taking off on time.

"I was told, 'Oh, yeah, we can get a cleaning crew, but you're going to be the reason this flight is delayed,'" Trail told the news outlet.

He claimed that a flight attendant gave him paper towels to clean the throw up before a cleaner boarded the plane with a spray bottle and towel.

Even after the seat was "cleaned," Trail says, there was still residue left.

"There's gotta be some limitations. I mean you have to provide a sanitary environment and there should be an apology," Trail said, according to the site.

United Airlines told The Post that Trail was not forced to clean anything and that a cleaning crew was called on board to address the issue.

"We're disappointed that this aircraft did not meet our standards for cleanliness. Once the issue was brought to our crew's attention, cabin cleaners were called on board to clean the seat prior to departure. We have reached out to our customer to better understand what happened," United said.

The airline also said that it was unknown whether it was actually vomit on the seat.