In the 12 months to August 2025, Delta transported 202 million passengers, filling 84.4% of the available seats. Traffic rose by 1.8% year-over-year. But as capacity rose faster, its seat load factor reduced. These findings are from examining the US Department of Transportation data.

Route-by-route analysis for the same period shows that the SkyTeam member had 17 airport pairs with over a million passengers . This is based on all passengers: those who only flew between the two airports and those who connected elsewhere. Obviously, most of those markets would be nowhere near as popular without the transit traffic.

Delta's Routes With 1 Million Or More Passengers

Delta's 17 million-plus routes collectively accounted for 11% of its total traffic. In other words, one in every n

See Full Page