| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Nov 01 | SEA | DEN | 14:17 | 17:33 |
En-Route
|
Track > |
Alaska Airlines Flight AS421 connects Seattle, United States to Denver, United States, taking off from Seattle Tacoma International Airport SEA and landing at Denver International Airport DEN.
How long is the AS421 flight from Seattle to Denver?
The average flight time from Seattle to Denver is 2 hours and 16 minutes. The flight distance is 1645 km / 1022 miles and the average flight speed is 726 km/h / 451 mph.
How many AS421 flights are operated per week?
1 flight per week. The flight AS421 is operated on Sunday.
What is the On-Time Performance (OTP) of Alaska Airlines Flight AS421 Seattle to Denver?
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 Sunday, November 1st, 2026 with the flight status being En-Route on 17:33.
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.
Flight AS421 is code-shared by 2 airlines using the flight numbers JL6364, QR2110
Other flights departing from Seattle SEA: AS223, AS1793, UA434, AA717
Other flights arriving at Denver DEN: UA1918, WN1018, DL2759, UA2152
All flights connecting Seattle SEA to Denver DEN.