Why flights are so expensive and will likely stay that way

• United and American each expect fuel costs to rise $6 billion (over 50% increase) compared to 2025, driven by the U.S.-Iran conflict that pushed jet fuel prices from $2.39/gallon in February to $4.78 in April before settling at $3.60
• Spirit Airlines ceased operations in May 2026 after its second bankruptcy, removing tens of millions of seats from the market, while other budget carriers like Avelo are shrinking capacity
• Airlines report minimal demand impact from higher fares, with Southwest's average one-way fare rising to $225.61 (up from $186.65 in 2025) and carriers expecting continued unit revenue growth through year-end

Summary: High Airfares Expected to Persist Amid Fuel Costs and Reduced Competition

Key Findings:

U.S. airfares surged 26.5% in June year-over-year, with airlines signaling prices will remain elevated through at least year-end. Despite significant fare increases, customer demand remains robust with minimal booking resistance.

Major Airlines & Financial Impact:

• United Airlines and American Airlines each expect $6 billion increases in fuel costs versus 2025—a jump exceeding 50%
• Southwest Airlines' average one-way fare rose to $225.61 in Q2 2026, up from $186.65 in Q2 2025
• Second-quarter fuel bills: United ($5.1B), American ($4.9B), Delta ($4.1B), Southwest ($2.2B)

Market Dynamics:

The four largest carriers (American, Delta, United, Southwest) now control 82.1% of domestic seat capacity, reducing consumer options. Spirit Airlines ceased operations May 2 after a second bankruptcy filing, removing millions of seats from the market. Smaller low-cost carriers like Avelo are shrinking, though Frontier, JetBlue, and Breeze Airways plan modest growth.

Fuel Price Volatility:

Jet fuel costs spiked from $2.39/gallon (Feb 27) to $4.78 (April 2) following U.S.-Iran military conflict, currently at $3.60—still 50% above pre-conflict levels. Southwest took unprecedented action shipping 12 million gallons via Panama Canal to ensure West Coast supply.

Future Outlook:

Airlines cite escalating labor, maintenance, and airport fees as additional cost pressures. Budget carriers including Frontier, JetBlue, and Allegiant are introducing premium seating options to capture higher-paying customers. The post-summer period will test consumer price tolerance, with airport screenings down 0.5% year-over-year through July 24.