
Educating, defending and liberating the pilots of yesterday, today and tomorrow. I’m a Gulfstream corporate pilot, former airline pilot and an O.G. #AvGeek.
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ALT US map of the 40 busiest domestic routes, Aug 2025 to Jul 2026, each line colored by the airline with the most seats. United wins 14, mostly between its hubs in Chicago, Denver, San Francisco, Newark and Houston. Delta wins 9, mostly from Atlanta, including Florida. Southwest wins 6 in the West plus Orlando to San Juan. American wins 6, mostly from Dallas. Alaska wins 5 from Seattle and Hawaii. Source: BTS T-100.

ALT Bar chart of the 20 busiest US domestic routes by total seats. Each bar shows the leading airline in full color and every other airline in a lighter tint. DFW-LAX is 75% American, ATL-TPA 73% Delta, ATL-MCO 69% Delta. LAX-LAS is the most split: Southwest 26%, Delta 21%, United 19%, American 14%. Source: BTS T-100, Aug 2025 to Jul 2026.

ALT Line chart of each airline's share of seats by route size rank. Southwest peaks at 28.1% on routes ranked 201st to 1,000th and falls to 12.0% on the 20 busiest. Frontier rises from 1.1% on smaller routes to 9.4% on the 20 busiest. Allegiant has 7.7% of smaller routes and none of the busiest. Source: BTS T-100, Aug 2025 to Jul 2026.





























