This is another opinion from earlier in the year (May) that I haven't yet reported on.
In People ex rel. Harris v. Delta Air Lines, Inc., 247 Cal.App.4th 884 (2016), the Attorney General brought a UCL "unlawful" prong action against Delta Air Lines, alleging that Delta's mobile app violated the Online Privacy Protection Act (Cal. Bus. & Prof. Code §§22575-79). The Court of Appeal (First Appellate District, Division Three) affirmed the trial court's holding that this claim was expressly preempted by the federal Airline Deregulation Act of 1978.
Of interest is the Court's conclusion that the claim "related to" Delta's air transportation services:
Id. at 901.