DEN → SEA: cancellations & delays
Over Jan 2023 - Apr 2026, 0.7% of Denver International Airport (DEN) to Seattle–Tacoma International Airport (SEA) flights were cancelled and 25.1% arrived at least 15 minutes late, across 21,527 flights, flown by UA, AS, WN, DL, F9, OO. Cancellations peak in July.
Check today's live DEN departures →Airport pages: Denver International Airport (DEN) · Seattle–Tacoma International Airport (SEA)
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.