Northwest Airlines, Inc. v. Duncan

Background

This case grew out of a state-law personal-injury claim tied to an airline’s smoking policy and raises a question about a federal law that bars state rules “related to a price, route, or service” of an airline. The dispute pits a person injured under a state rule against airline companies that operate across state lines and must follow federal and state rules.

Reasoning

The central question was what the word "service" means in the federal Airline Deregulation Act’s preemption clause. Courts of Appeals disagree. The Ninth Circuit (following Charas) held that "service" covers things like prices, schedules, origins, and destinations but not onboard amenities such as drinks, help to passengers, or luggage handling; the Third Circuit agreed. Other circuits (including the Fifth, Fourth, and Seventh) read "service" much more broadly to include ticketing, boarding procedures, food and drink, and baggage handling. The Supreme Court declined to take the case, so the Ninth Circuit ruling stays in effect in that circuit and the broader split among appellate courts remains unresolved.

Real world impact

Because the Court refused review, airlines continue to face different rules in different circuits about what state claims they may face. That means some state tort claims tied to boarding, baggage, or in-flight policies may be blocked in some places but allowed in others. The denial does not settle the issue nationally; the disagreement could affect many lawsuits against airlines until a future decision resolves the split.

Dissents or concurrances

Justice O’Connor, joined by the Chief Justice and Justice Thomas, dissented from the denial. She argued the Court should hear the case to resolve the clear circuit split and give airlines needed certainty nationwide.