The U.S. Department of Transportation is holding off on enforcing refund rules that apply when airlines assign passengers to flights carrying different numbers than those on their original tickets.
Under existing rules, the Federal Register notes, a flight that carries a new number is treated as a cancellation. That designation ordinarily entitles the passenger to a prompt refund and triggers required consumer notifications. The department's extended discretion means it will not pursue enforcement of those requirements when a renumbered flight operates without any significant change or delay, as defined by DOT regulations.
The department first announced this enforcement pause on December 5, 2025. The extension, also documented in the Federal Register, is meant to give the agency room to complete pending rulemaking that would revise the regulatory definition of a flight cancellation.
Until that rulemaking is finished, the department will not act against airlines that place travelers on differently numbered flights, provided those flights meet the agency's standards for timeliness and service.