AJ came close to re-signing for Palace, but ran out of time to see a deal done.
"It was a bit of a whirlwind last night, but I’m really pleased to still be a QPR player. The interest from Palace was flattering, but I never once asked for a transfer and like I said a few weeks back, I owe it to QPR – who stood by me when I was injured last season – to stay and help get this club back to the Premier League," said Johnson.
"I am one hundred per-cent committed to QPR and will continue to give my all to help us build on what has been a promising start to the season."
For the big stories and the banter follow us on Twitter: @tribalfootball