"Flight attendants did an excellent job and all passengers were very calm."
Video claiming to be of an Alaska Airlines crew member on flight 751 shows the air steward walking a fire extinguisher through a smoke-filled cabin.
Airport Police said the phone was "burned beyond recognition," in a statement to The Seattle Times.
"However, during an interview with one of our Port of Seattle Police officers, the passenger volunteered the phone was a Samsung Galaxy A21. Again, we could not confirm it by looking at the remains of the device."
Passengers were taken by bus to the terminal, and two received treatment at a hospital, Lane said.
The Airport later updated their statement to say injuries were minor and "scrapes and bruises were reported".
There were 129 passengers and six crew members onboard.
Mobile phone manufacturer Samsung has not commented on the incident.
- Associated Press, with additional reporting