AS421 Flight Status Alaska Airlines: Denver to Seattle (ASA421)

Alaska Airlines Flight AS421 connects Denver, United States to Seattle, United States, taking off from Denver International Airport DEN and landing at Seattle Tacoma International Airport SEA.

What is the On-Time Performance (OTP) of Alaska Airlines Flight AS421 Denver to Seattle?

The Airportia On-Time Performance Rating for Alaska Airlines Flight AS421 is 5/5 stars. This metric is calculated using data from the past 10 flights.

When was the latest AS421 flight?

The latest flight took off on Monday, November 2nd, 2026 with the flight status being Scheduled on 20:41.

How else can the flight AS421 be referenced as?

This Alaska Airlines flight can also be referenced as ASA421, AS0421, AS 421, ASA 421.

How often is flight AS421 delayed?

On average, 0% of all AS421 flights are delayed. The average delay is 0 minutes.

Can I get compensation for my delayed or cancelled AS421 flight or baggage issues?

If your AS421 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.

See our AS421 Flight Tracker above for more details.

AS421 and Denver DEN to Seattle SEA Flights

Other flights departing from Denver DEN: WN4740, WN286, DL2176, DL2543

Other flights arriving at Seattle SEA: AS322, AS569, DL928, AA2177

All flights connecting Denver DEN to Seattle SEA.

AS421 Alaska Airlines Flight: Denver to Seattle Route Map

Flight Delay Compensation up to 600€/$: Claim for delay, cancellation, or baggage issues >

New Flights: 6B283 PC4101 VT4705 VT4706 ET291 5F6030 AS1859 AC572 WJ3795 2S6976

Flight-schedule data supplied by Aviation Edge Real-time Flight Schedules API.