In 2012, fans were charged £77.50 to watch a Europa League tie with Athletic Bilbao and £71 in 2016 for a game against FC Midtjylland in the same competition.
United say the LaLiga club have refused to lower the cost, prompting them to take action by charging the same amount for Sevilla fans travelling to Old Trafford for the second leg of the last-16 tie in March.
In addition, to ease the financial strain on their own supporters, Manchester United will use the proceeds of those ticket sales to subsidise those who have bought tickets to the away leg.
"We have been working with the club since the ridiculous £89 price was known to ensure our fans didn't end up paying this much".
Sevilla were accused of setting "exorbitant" prices when it emerged they would be charging United fans at least £89 for the game.
Sevilla claim that United have not followed UEFA's ticket guidelines in allocating 5% of the tickets to their supporters and had been given just under 3,000 tickets when they should have had 3,800.
"Right now everything is hypothetical as United have not informed the club officially of the price rise", added the source. "We welcome UEFA's willingness to discuss these issues".