Eleanor Wilson was banned from teaching after a panel found her guilty of unacceptable professional conduct and bringing the profession into disrepute.
The panel heard the 28-year-old had sex with a pupil on a flight back from Geneva following a school visit to the Large Hadron Collider in Switzerland.
During the flight in August 2015 Wilson, who was said to be intoxicated, performed a sex act on the teenager in the plan toilet and the pair had sex, the panel heard.