8 March 2018
(The Drive, U.S.A.)
It was a Phoenix Air flight and American Airlines Flight 1095 that had independent close encounters with an unknown craft flying at around 40,000 feet.
The incidents occurred on 24 February 2018, between roughly 3:30 p.m. and 4:15 p.m. local time.
The airplanes were flying (heading east) at about 37,000 feet between the Sonoran Desert National Monument, Southern Arizona, and the border of New Mexico when the incident occurred, according to the article.
Wikipedia article: “Sonoran Desert National Monument”:
Map of Arizona (lib.utexas.edu)