SOFIA, NASA's Stratospheric Observatory for Infrared Astronomy:
SOFIA is based on a Boeing 747SP wide-body aircraft that has been modified to include a large door in the aft fuselage that can be opened in flight to allow a 2.5 m (8.2 ft) diameter reflecting telescope access to the sky. This telescope is designed for infrared astronomy observations in the stratosphere at altitudes of about 12 kilometres (41,000 ft). SOFIA's flight capability allows it to rise above almost all of the water vapor in the Earth's atmosphere, which blocks some infrared wavelengths from reaching the ground. At the aircraft's cruising altitude, 85% of the full infrared range will be available. The aircraft can also travel to almost any point on the Earth's surface, allowing observation from the northern and southern hemispheres.
I know that there were plans to try to observe a rare occultation event, where the asteroid 2014 MU69 around 17-July 2017 will pass in front of a faint star and block out its light. There are predictions (data and maps) shown below, and a cryptic list of SOFIA flight plans can be found here.
You can read more about what's happening in this interesting answer as well as in the original question there. This is important because 2014 MU69 is the next target for the New Horizons spacecraft after its Pluto flyby in July of 2015.
QUESTION: If I wanted to look for official flight plans, and watch for any possibility of near real-time data (even if intermittent) on FR24, how and where could I look up the SOFIA aircraft?
above: predictions from here.
below x2: images from Space.com's Photos from SOFIA, NASA's Flying Telescope (Gallery); click them for full size images.