Many thanks to Melanie Schade for sharing a photo of Keanu Reeves at LAX on FB. The photo was posted on June 14, 2016.
Many thanks to Stewart Rosales Laparan who shared two photo with Keanu Reeves at LAX on FB here and here. Both photos were posted on June 14. In the comments he said that he had landed safely at LAX.
Keanu appears to be wearing the same clothes in all of the photos. While the photos were posted on June 14 it is not clear if they were from that day or several days earlier. Keanu was at the Art Basel UN event on June 13 and Keanu returned in time to attend The Neon Demon premiere in LA on June 14. Regardless of the exact day that the photos were taken, they had to have been taken sometime during this narrow window.