Released in theaters May 21, 1980. VHS home video release November 13, 1984.
Boba Fett was played by Jeremy Bulloch, with one hallway scene played by John Morton.
Jason Wingreen did the original voice of Boba Fett. In 2004, it was re-dubbed by Temuera Morrison.
Boba Fett has four lines in the film.
Boba Fett's screen time is 6 minutes 32 seconds, where 13 seconds of which is his ship only. Only one scene is over 1 minute long. The second longest scene is 47 seconds long.
See https://www.bobafettfanclub.com/fettpedia/the-empire-strikes-back/ for much more.
"As you wish." — Boba Fett to Darth Vader (01:05:16 - 01:05:57)
"He's no good to me dead." — Boba Fett to Darth Vader about Han Solo (01:29:41 - 01:30:28)
"What if he doesn't survive? He's worth a lot to me." — Boba Fett to Darth Vader about Han Solo (01:33:34 - 01:36:58)
"Put Captain Solo in the cargo hold." — Boba Fett (01:41:45 - 01:41:57)