Northwest, Inc. v. Ginsberg

Issue: Whether the court of appeals erred in holding, in contrast with the decisions of other circuits, that respondent”s implied covenant of good faith and fair dealing was not preempted under the Airline Deregulation Act because such claims are categorically unrelated to a price, route, or service, notwithstanding that respondent”s claim arises out of a frequent-flyer program (the precise context of”American Airlines, Inc. v. Wolens“) and manifestly enlarged the terms of the parties” undertakings, which allowed termination in Northwest”s sole discretion.