Airlines warn changing daylight saving time would disrupt scheduling

Airlines are warning that changing daylight saving time would disrupt flight operations if the U.S. House’s Sunshine Protection Act becomes law. The measure, approved Tuesday by a 308-117 vote, would let states voluntarily observe daylight saving time year-round and end the twice-annual clock changes. Airlines for America (A4A), which represents major U.S. carriers, said any shift from current practices would require a phased implementation to manage complications tied to domestic and international scheduling, crew and aircraft positioning, and passenger connectivity. The bill now moves to the Senate, where it faces uncertainty despite President Donald Trump’s expected support. Most states currently switch clocks in March and November, while Arizona and Hawaii do not; 20 states have approved measures to remain on DST if Congress authorizes it.