Baldwin's spokesman Matthew Hiltzik said the actor was simply playing "Words with Friends" while the New York-bound plane was parked at the gate when he was asked to leave.
Words with Friends is a game similar to the board game Scrabble that is played on electronic devices.
"He loves WWF so much that he was willing to leave a plane for it," Hiltzik said.
Champion boxer Oscar De La Hoya was also on the flight with Baldwin and explained his take on the incident when interviewed at the airport.
"I actually felt Alec Baldwin was turning off his devices and he just got a little angry," De La Hoya told reporters.
One passenger Tweeted about the experience, saying, "On an AA flight at LAX. Alec Baldwin removed from the plane. We had to go back to the gate. Terrible that everyone had to wait."
Baldwin had plenty to say on Twitter, too.
"Flight attendant on American reamed me out 4 playing WORDS W FRIENDS while we sat at the gate, not moving. #nowonderamericaairisbankrupt," Baldwin Tweeted.
Baldwin later updated that he was put on another American Airlines flight in the afternoon. He then Tweeted, "The flight attendants already look.....smarter."
American Airlines Tweeted that it was looking into what happened.