SEA → DEN: cancellations & delays
Over Jan 2023 - Apr 2026, 0.8% of Seattle–Tacoma International Airport (SEA) to Denver International Airport (DEN) flights were cancelled and 22.4% arrived at least 15 minutes late, across 21,531 flights, flown by UA, AS, WN, DL, F9, OO. Cancellations peak in January.
Check today's live SEA departures →Airport pages: Seattle–Tacoma International Airport (SEA) · Denver International Airport (DEN)
Rates are historical averages from U.S. DOT (BTS) on-time records; a specific flight's live estimate can differ with weather and the day's disruptions.