There is no doubt about it: Denver is Southwest’s leading airport in July. That’s the case whether looking at flights, seats, available seat miles (ASMs; seats x distance), or the number of routes. While Southwest‘s Denver flights have risen by 11% versus June 2019, they’re down by 3% over last July, a period when decisions were made to capture short-term demand.
Multiple eastern routes have been significant frequency cuts versus last year. For example, Albany, Cincinnati, Fort Lauderdale, Grand Rapids, Hartford, Jacksonville, Miami, Norfolk, Panama City, and Pensacola have all reduced from 1x to 2x daily to Saturday-only. Staff shortages probably play a role.