Just months after predicting a booming future, US airlines are now grappling with economic uncertainty as rising tariffs and government spending cuts dampen travel demand. Consumers and businesses are cutting back on trips, forcing major carriers to lower profit forecasts for the first quarter.

The industry's outlook for the rest of the year has also dimmed as fears of slow economic growth and high inflation persist.

The S&P 500 passenger airlines index has fallen 15% this year, with stocks of major carriers like Delta and United dropping around 20%. With demand slowing, airlines have begun reducing flight schedules to avoid fare cuts and protect profit margins.

Several airlines, including Delta, United, and American Airlines, have trimmed their April-to-June capacity, while United's CEO has warned of further cuts if demand does not recover by late summer.

Adding to the industry's woes, concerns over airline safety have surged, contributing to the travel slowdown. Meanwhile, US consumer confidence has plunged to a four-year low, and airfares posted their first year-on-year decline in six months.

While airlines remain hopeful that full-year earnings targets will hold, sustained weak demand during the peak summer season could force further adjustments.