Congress Has Voted to End Daylight Saving Time and It Could Change Every Flight Schedule in US
Airlines, airports, and travelers in the US already build schedules around time-zone changes, federal clock rules, and international connections. That is why renewed attention on ending daylight saving time matters far beyond Congress, especially for flight timetables published months in advance. The key fact is that the Senate passed the Sunshine Protection Act on March 15, 2022, but the House did not take it up and the measure did not become law.
The Senate vote that put time changes into the travel conversation
The US Senate passed the Sunshine Protection Act by unanimous consent on March 15, 2022, according to Congress.gov, with the bill aimed at making daylight saving time permanent nationwide. That action did not itself end the clock change, because the House never passed the bill and President Joe Biden never signed it into law. As of July 2026, the US still switches clocks twice a year under current federal law.
For airlines, the scale is national. The Department of Transportation reports that US carriers operate thousands of flights a day, and those schedules are timed to local clocks at every airport in the network. A permanent shift in federal time rules would require airlines, reservation systems, airport operators, and global schedule databases to update how departure and arrival times line up across cities like Atlanta, Chicago, Denver, and Los Angeles.
What it would mean on the ground for US airports and travelers
What is confirmed is simple: if Congress ever makes one time standard permanent, published flight times would remain accurate, but the clock relationship between cities could change depending on the season. For example, flights touching states that now observe daylight saving time would no longer need the March and November adjustment. The exact impact on each route is not yet known because no new law has been enacted and no nationwide implementation plan has been released by the Federal Aviation Administration or major US airlines.
Some places already operate under different rules. Hawaii and most of Arizona do not observe daylight saving time, while Puerto Rico, Guam, American Samoa, the Northern Mariana Islands, and the US Virgin Islands stay on standard time year-round, according to the US government. That patchwork already affects scheduling, and any federal change would require another broad recalibration for hubs, regional airports, and cross-country itineraries.
Why this keeps coming back and what travelers should expect next
Lawmakers have cited health, commerce, and convenience in the debate. Senator Marco Rubio of Florida, the bill’s lead sponsor in 2022, said Americans were tired of changing clocks twice a year, while the American Academy of Sleep Medicine has publicly supported permanent standard time instead of permanent daylight saving time. That split helps explain why the issue keeps returning but has not produced a final federal change.
For travelers, the practical takeaway is that nothing has changed yet. Airlines continue to publish schedules under current federal time rules, and the Transportation Security Administration and airport operators have not announced any special timetable changes tied to a new law. Unless Congress passes a new measure and a president signs it, spring and fall clock changes remain part of how US flight schedules are built.
