What were the busiest US domestic air routes in 2025?
Published 2026-11-07 · By Pushbuild · Data: Airline Route Traffic API – US Passengers, Seats and Cargo by Route
New York JFK–Los Angeles was the busiest US domestic route in 2025, with 2,912,963 passengers, followed by LaGuardia–Chicago O'Hare (2,769,621) and LAX–San Francisco (2,710,497). US domestic passengers reached 848.6 million in 2025, 3.3% above 2019's 821.1 million. Yet New York JFK–Los Angeles carried 21.6% fewer, LAX–San Francisco 23.3% fewer and Las Vegas–LAX 23.0% fewer. Of the ten busiest routes, only Denver–Phoenix grew.
“TranStats provides one-stop shopping for intermodal transportation data for researchers, decision-makers, as well as the general public interested in transportation issues.”
— Bureau of Transportation Statistics, T-100 Segment (All Carriers)
| Route | 2019 | 2025 | Change |
|---|---|---|---|
| JFK–LAX | 3,716,743 | 2,912,963 | -21.6% |
| LGA–ORD | 3,100,122 | 2,769,621 | -10.7% |
| LAX–SFO | 3,534,766 | 2,710,497 | -23.3% |
| ATL–MCO | 3,078,434 | 2,699,639 | -12.3% |
| LAS–LAX | 3,191,378 | 2,456,086 | -23.0% |
| DEN–PHX | 2,188,099 | 2,396,088 | +9.5% |
| LAX–ORD | 2,819,722 | 2,329,980 | -17.4% |
| HNL–LAX | 2,362,579 | 2,313,111 | -2.1% |
| ATL–LGA | 2,417,892 | 2,219,008 | -8.2% |
| ATL–FLL | 2,742,631 | 2,190,110 | -20.1% |
| DFW–LAX | 2,437,643 | 2,084,561 | -14.5% |
| DEN–ORD | 2,111,033 | 2,065,317 | -2.2% |
Caveats
DOT T-100 segment data, both directions combined, all carriers. Passengers per flight segment, so connecting travellers count on each leg.
Sources
- Bureau of Transportation Statistics, T-100 Segment (All Carriers), read through the Pushbuild Airline Route Traffic API on 2026-11-07
Data as of 2026-11-07. Every figure in this post is in the table above and the CSV below.
Download the data behind this post: b4-t100-busiest-domestic-routes-2025.csv
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