Alaska Airlines
AS620Seattle to Denver
Alaska Airlines flight AS620 flies from Seattle Tacoma (SEA) to Denver (DEN), 1,645 km. Over August 2025 to July 2026 it usually arrives about 9 minutes late: 72% of 308 flights arrived within 15 minutes of schedule and 0.6% were cancelled (US Department of Transportation data).
On-time record, last 12 months
72%
on time (within 15 min)
15%
more than 30 min late
0.6%
cancelled
+9 min
average arrival vs schedule
Every operation of AS620, August 2025 to July 2026: 308 flights. Source: US Bureau of Transportation Statistics, public domain.
Routes flown as AS620
- Seattle Tacoma (SEA) to Denver (DEN)83 flights
- Sacramento (SMF) to Seattle Tacoma (SEA)79 flights
- San Francisco (SFO) to Seattle Tacoma (SEA)51 flights
- San Diego (SAN) to Orlando (MCO)47 flights
- Denver (DEN) to Seattle Tacoma (SEA)38 flights
- Portland (PDX) to San Francisco (SFO)10 flights
Other flights from Seattle to Denver
More about Seattle Tacoma (SEA) and Denver (DEN).
Embed this on your site
A live badge for travel blogs, forums and trip reports. It updates as new data comes in, and links back here for the full stats.
Dark badge, HTML
<a href="https://tripstow.com/flights/as620" title="AS620 is on time 72% of the time on TripStow"><img src="https://tripstow.com/badge/flights/as620.svg" alt="AS620 is on time 72% of the time" width="360" height="88" loading="lazy"></a>
Light badge, HTML
<a href="https://tripstow.com/flights/as620" title="AS620 is on time 72% of the time on TripStow"><img src="https://tripstow.com/badge/flights/as620.svg?theme=light" alt="AS620 is on time 72% of the time" width="360" height="88" loading="lazy"></a>Markdown, for forums and README files
[](https://tripstow.com/flights/as620)Flying soon?
Forward your booking to TripStow and get your trip built for you, with check-in reminders, punctuality for every flight and a map of everywhere you have been.
Start free