Leighton was called up after he cleared waivers on Wednesday.
Leighton gives the Flyers three goalies. He'll backup Sergei Bobrovsky and Brian Boucher.
Leighton was 14-12-1 with a 2.22 GAA and a .926 save percentage in 30 games for the Phantoms this season. In one game for the Flyers this season, Leighton is 1-0-0 with a 4.00 GAA and a .889 save percentage.
He went 8-3 in the playoffs last year with three shutouts, posting a 2.46 GAA and .916 save percentage.