The FAA is extending through Oct. 31, 2008, a flight-reduction program at Chicago O’Hare International Airport, including slot reservations for general aviation operations. Through several six-month extensions, the program has been in effect continuously since November 2004. The FAA said that the flight limits imposed since 2004 “have been effective” in easing congestion. Among other restrictions, the program limits all Part 91 and/or 135 IFR and VFR unscheduled flights to four operations per hour from 7 a.m. to 9 p.m. daily.