The shuttle touched down on the runway at Florida's Kennedy Space Center, in a rare night landing, late Sunday night.
Launch director Mike Leinbach said early Monday that there was a little bit of sadness surrounding the landing, given that there's just one more flight left for Endeavour. He says shuttle workers fall in love with the machines, "and it's going to be hard to let them go."
Overall, only four shuttle flights remain.
Endeavour's two-week mission was highlighted by the installation of a new space station room, called Tranquility, and an unparalleled observation deck. The station is now 98 percent complete.