Analysis by API
Airline Route Traffic API – US Passengers, Seats and Cargo by Route: findings
3 posts built from the Airline Route Traffic API – US Passengers, Seats and Cargo by Route.
Southwest left a quarter of its domestic seats empty in 2025
Southwest filled 74.3% of its domestic seats in 2025, the lowest of any large US airline; Delta filled…
The routes that vanished, and the ones that doubled
Newark–Chicago Midway went from 322,232 passengers in 2019 to 10,282 in 2025 (-96.8%). Bozeman–Denver went from 306,176 to 667,832 (+118%), and…
What were the busiest US domestic air routes in 2025?
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…
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