Please Help- Cheap flights to Las Palmas? (Tenerife)

I want to fly to Las Plamas De Gran Canaria in next 2 weeks. I am going to be in southern France The town of Briancon which borders Italy.

Closest airports to Briancon are Turin , Italy or Grenoble, France.

I also have some friends in Barcelona, Madrid, and Valencia. I could also visit them and fly out of those 3 airports.

If you could provide my cheaper airline/city options would be appreciative.

Cheers-Matt