Yes, the Atlanta Falcons have played in the Super Bowl twice, following two NFC championship victories in 1999 and 2017.
In 1999 the Falcons earned their first Super Bowl berth but lost to the Denver Broncos. In 2017 they made their second Super Bowl appearance, where they faced the New England Patriots. Despite leading 21–3 at halftime, the Falcons lost in overtime 34–28.