Mormon missionaries Richard Norby, 66, of Lehi, and Joseph Empey, 20, of Santa Clara, were with Mason Wells at the airport and were also admitted to hospital after suffering serious injuries from the blast.
The three men were at the airport with Fanny Rachel Clain, 20, of Montelimar, France, who was on her way to a missionary assignment in Cleveland.
She had passed through security to a different part of the airport at the time of the explosion.
The Church of Jesus Christ of Latter-day Saints said she did not make her flight out and was taken to hospital with minor injuries.
Friend of the Wells family Chris Lambson said the teenager was also in France, about two hours away from Paris, during the deadly series of attacks in the city last November.