What Happened?
Ever wondered why your state can't always step in when an airline treats you badly? A federal law from 1978 bars states from enacting or enforcing laws "related to a price, route, or service" of airlines, and the Trump administration's deregulatory moves have sharpened a long-running dispute over how far that bar reaches. The Congressional Research Service (CRS) examined how far the Airline Deregulation Act of 1978 can block states from regulating airlines in a new report on its preemption provision, which bars states from enacting or enforcing any law "related to a price, route, or service" of an air carrier.
The Supreme Court has read that phrase broadly enough to reach state laws that only indirectly affect airlines, though courts have carved out exceptions when a state law's effect is "too tenuous, remote, or peripheral."
Why Does it Matter to Me?
When your state tries to protect you from an airline's practices, such as deceptive fare advertising or mishandled baggage, the ADA may block that protection entirely.
The Supreme Court has ruled the ADA preempts state consumer protection laws used to police fare advertising, and also preempts state contract claims that would enlarge obligations airlines voluntarily adopted. It does allow breach-of-contract claims that enforce an airline's own stated terms, so you can still sue an airline for breaking its own rules, but not for violating broader state consumer laws.
Whether that tradeoff still protects passengers adequately is now contested, with federal appeals courts split on whether "service" in the ADA covers amenities such as boarding procedures and baggage handling.
Both Sides, Now
An airline industry group has argued that broad preemption "has helped create a cost-effective and efficient transportation network throughout the United States." The Trump administration has moved in a deregulatory direction at the U.S. Department of Transportation (DOT), withdrawing a proposed passenger-rights rulemaking in November 2025 and proposing changes to fare-advertising rules in July 2026, steps the CRS report says have sharpened the underlying legal dispute.
Opponents point to concrete passenger harm. After Southwest Airlines' December 2022 operational meltdown stranded passengers across the country, Southwest paid more than $600 million in refunds and reimbursements, and DOT imposed a $140 million civil penalty on Dec. 18, 2023. The National Association of Attorneys General wrote to Congress in 2022 arguing DOT does not adequately protect airline consumers and that states should be authorized to enforce consumer protection laws against airlines.
What Happens Next?
Most federal appeals courts read "service" broadly to cover airline amenities such as boarding procedures and baggage handling, while the Ninth Circuit limits the term to prices, schedules, origins, and destinations.
The CRS report concludes Congress may choose to monitor how courts apply the ADA's preemption provision and could amend it to narrow, expand, or clarify its scope. DOT issued a proposed rule in July 2026 to amend its air-fare advertising requirements.
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