It is far from set in stone, as there are still multiple hoops that need to be jumped through before the moving trucks are packed. Spanos has done nothing official yet; he hasn’t informed city officials in Los Angeles or San Diego of his intent to move and has not filled in an official relocation letter. Should Spanos follow through with his plan then the Chargers would need to be out of San Diego by July 1st. Considering a practice facility and office space has already been leased in California by the team, they could be out much earlier than that.
It’s fair to say that the Chargers potential move to Los Angeles has been talked about less than the Raiders move to Las Vegas, but it is still a significant league topic nonetheless. The Rams moved to LA this year and had a horrendous season, so it would be a big news if a team of the Chargers calibre were to make their new home the City of Angels for 2017.