Alaska Airlines AS643 Flight Status (Denver to Seattle)
According to Trip.com real-time data, the AS643 flight operated by Alaska Airlines on Apr 4, 2026 is scheduled to fly from Denver (DEN) to Seattle (SEA). The flight is expected to depart at 07:00 (local time in Denver, UTC-6) and land at 08:34 (local time in Seattle, UTC-7) .
Fri, Apr 3
Sat, Apr 4
Sun, Apr 5
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Arrived
The flight has arrived 30m early
3h 10m
Check-in Counter
21
Boarding Gate
A44
Arrival Gate
C20
Baggage
10
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Scheduled
Your flight will depart on time.
3h 10m
Check-in Counter
21
Boarding Gate
A46
Arrival Gate
N10
Baggage
13
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Scheduled
Your flight will depart on time.
3h 10m
Check-in Counter
21
Boarding Gate
A44
Arrival Gate
D5
Baggage
13
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Information provided by VariFlightVariFlight. For real-time updates, please check airport displays or contact your airline.
Track the Previous Flight Status: Scheduled
AS219
|
San Diego (SAN) 
Denver (DEN)
Denver (DEN)Scheduled: 23:44
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AS643 Aircraft Details and Cabin Information - Denver to Seattle on Alaska Airlines
According to Trip.com real-time data, the AS643 flight flying from Denver to Seattle on 4/4/2026 is operated by the aircraft model Boeing 737-900. This aircraft has been in service for 10y, 4m. The aircraft is equipped with 178 seats.
Boeing 737-900
Punctuality (Departure)
80%
Punctuality (Arrival)
100%
Early on average
13 minutes
Age
10y, 4m
Seats
178
Flight Distance
--
Economy
Premium Economy
First
In-Flight Services
None
Inflight entertainment is available
Wi-Fi (additional charge)
USB port and power outlet
Seat Information
--
Legroom
43 cm
Seat width better than on 48% of flights
100°
Reclining Angle
3-3
Seat layout example
In-Flight Services
Meal included
In-flight entertainment is unavailable
Wi-Fi is available
USB port and power outlet
Seat Information
89 cm
More legroom than on 59% of flights
43 cm
Seat width better than on 28% of flights
100°
Reclining Angle
3-3
Seat layout example
In-Flight Services
Meal included
Inflight entertainment is available
Wi-Fi (additional charge)
USB port and power outlet
Seat Information
104 cm
More legroom than on 81% of flights
53 cm
Seat width better than on 67% of flights
120°
Reclining Angle
2-2
Seat layout example
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AS643 Recent Flight History and Status - Alaska Airlines
Trip.com historical records show that the last AS643 flight departed on Fri, Apr 3 from DEN at approximately 07:11. This flight is expected to arrrive in SEA at 08:40.
| Date | Airport | Aircraft Model | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Tue, Mar 31 | Denver (DEN) | Seattle (SEA) | 739 | 07:20 | 08:46 | Arrived |
| Wed, Apr 1 | Denver (DEN) | Seattle (SEA) | B39M | 07:12 | 08:39 | Arrived |
| Thu, Apr 2 | Denver (DEN) | Seattle (SEA) | 739 | 07:22 | 08:57 | Arrived |
| Fri, Apr 3 | Denver (DEN) | Seattle (SEA) | B39M | 07:11 | 08:40 | Arrived |
| Sat, Apr 4 | Denver (DEN) | Seattle (SEA) | 739 | 07:00 | 08:34 | Scheduled |
| Sun, Apr 5 | Denver (DEN) | Seattle (SEA) | 739 | 07:00 | 09:10 | Scheduled |
| Mon, Apr 6 | Denver (DEN) | Seattle (SEA) | 738 | 07:00 | 09:10 | Scheduled |
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AS643 On-Time Performance, Departure, and Arrival Trends
Review AS643 on-time performance based on recent trips, including departure punctuality, arrival punctuality, average delays, and early arrival trends to better understand overall flight reliability. Based on the average performance of AS643 flight over the past 30 trips, the on-time departure rate of AS643 is 80% (Late on average 18 minutes), while the on-time arrival rate is 100% (Early on average 13 minutes).
On-Time Departures
Punctuality
80%
Late on average 18 minutes
Early
0%
On time
80%
30 mins late
20%
60 mins late
0%
90 mins late
0%
Canceled
0%
On-Time Arrivals
Punctuality
100%
Early on average 13 minutes
Early
90%
On time
10%
30 mins late
0%
60 mins late
0%
90 mins late
0%
Canceled
0%
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Arrival Info: Seattle Weather & Current Time
Mostly cloudy
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5°C - 16°C
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-1 hour time difference
Time on arrival: Denver 10:10| Seattle 09:10
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