The university owns a Citation Bravo jet and has 50 percent ownership in a 1999 King Air C90B turbo prop through Executive AirShares, both purchased with private funds.
KU says it spends almost $700,000 per year to keep the aircraft going.
University spokeswoman Lynn Bretz says individual departments that use the planes might have to pay for the flights and will likely cut back.
Bretz says the majority of flights are logged by the KU Medical Center's medical outreach program serving rural Kansans but the planes are also used by the athletics department, the provost and the chancellor.
(Copyright 2009 by The Associated Press. All Rights Reserved.)