The objective is to avoid having to find a seat for a crew member after all passengers have already boarded.
Survey respondents were asked to select an American Airlines or United Airlines flight from New York City to Chicago and were presented different scenarios in order to gauge how layovers and price would impact their decision.
The change comes in response to videos showing a man being dragged from his seat after refusing to give it up voluntarily.
United is hoping to avoid a situation like the one on April 9, when David Dao was told he needed to leave a flight to make room for crew members. Media coverage created a PR nightmare for the airline. Dao suffered concussion, a broken nose and two lost teeth, according to one of his lawyers on Thursday.
United Airlines is changing a company policy so that crew members can no longer displace passengers who are already seated, the Associated Press reports.
United Airlines has said it is changing its policy on booking its own flight crew on to its planes. Under the shift, once passengers have boarded, they are safe and will not be removed from the plane, period. Schmerin also reiterated that United is absolutely done removing passengers who pose no immediate security threat from their flights.
United Airlines found itself in the news again this week when a scorpion, which fell from overhead bin, stung a passenger.
All passengers on United Express flight 3411 will be compensated equal to the cost of their tickets and could take the compensation in cash, travel credits or miles, United said this week.
Almost a week since the incident, United is still dealing with the backlash.
United initially said Dr Dao's flight, from Chicago's O'Hare International Airport to Louisville, Kentucky, was overbooked, and its staff picked passengers to be bumped.
The company has also raised compensation that supervisors on duty can offer to displaced passengers from US$1,350 to US$10,000.