US Aviation Market Data Insights

Find below flight data and analysis focused on the US aviation market, with data powered by OAG's Schedules Analyser. The data is updated monthly. Seats are calculated as departing seats (one-way).

• The Top 10 carriers by seats remain unchanged from November 2024.
• American Airlines is the biggest carrier in the US this month with 20% of the market, 20.5m seats.
• Southwest is second and Delta Air Lines a close third largest, with 19% and 18% share, and 18.8m seats and 18.6m seats respectively.
• The big 4 carriers continues to account for 73% of capacity.
• Percentage wise, Allegiant Air made the largest monthly increase in the Top 10, increasing by 22.1% vs last month.
  
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• American Airlines, Southwest Airlines and Delta Air Lines increased capacity by over 531,000 seats vs November 2024.
• Allegiant Air and United Airlines increased capacity by over 330,000 seats.
• The two Latin American carriers, Avianca and Aeromexico, increased capacity by over 55,000 seats vs last month.
  

• Despite a 5.9% reduction in daily capacity, the busiest route this month is Las Vegas - Los Angeles with 290,500 seats.
• Daily capacity on the Los Angeles - San Francisco route reduced by 13.4%, taking it from the busiest route in November 2024 to the 6th busiest route this month. United Airlines reduced capacity by over 17,400 seats on the route.
• Daily capacity on the Los Angeles - Chicago and Dallas Fort Worth - Los Angeles routes increased by 5.4% and 6.4% respectively, taking them into 9th and 10th position. They displace Atlanta - New York La Guardia and Denver - Las Vegas from the Top 10.
  
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• Florida continues to see strong capacity growth in December 2024, increasing by 13% and adding 1.4m seats vs last month.
• Reversing the declines from last month, the large states of Texas, California and New York all saw capacity increase by 3-4%.
• Overall capacity increased by 4% to 101 million seats, an increase of 3.5m vs the previous month.