"Saha Airlines of Iran was the last airline to keep 707s in scheduled passenger service until April 2013,[30] though it continued to use them for charter cargo flights until 2019, when their final 707 on lease crashed.[31]
As of 2019, only a handful of 707s remain in operation, acting as military aircraft for aerial refueling, transport, and AWACS missions.[32]" https://en.wikipedia.org/wiki/Boeing_707