Informational Guide to Seattle–Tacoma Airport - Seatac (SEA) - NON OFFICIAL

AS9421 Alaska Airlines - Flight Status

Below, you can find details about Alaska Airlines flight AS9421, which currently operates between the airports of Seattle - Seattle-Tacoma International Airport (Airport Code SEA) and San Antonio - San Antonio International Airport (Airport Code SAT).
This flight data pertains specifically to the flight's details for Saturday, February 21, 2026.

AS9421 On Time performance:
24
We have calculated the percentage of flights that arrived within 15 minutes of their scheduled time, or earlier, based on real flight data from the last 3 months. More about punctuality and delays

Flight Status

AS9421 Alaska Airlines to San Antonio

We only provide flight information for yesterday, today and tomorrow. This flight is not scheduled for this interval of time.

Airline information

Alaska Airlines
Alaska Airlines

Departure

Seattle (SEA)
February 21, 2026
Seattle-Tacoma International Airport

Arrival

San Antonio (SAT)
February 21, 2026
San Antonio International Airport
Disclaimer
The information displayed on this website is gathered from third-party providers with a wide reputation on the sector, which in turn obtain the information from the airlines. This data is provided only for informative purposes. www.seattle-airport.com assumes no responsibility for loss or damage as a result of relying on information posted here. Please contact your airline to verify flight status.

Additional Information

Which is the frequency of flight AS9421?
The flight AS9421 is scheduled to flight on Monday, Tuesday, Saturday, Sunday on a weekly basis.

Which is the distance of flight AS9421?
The distance between the two airports is 1774 miles.

Which is the flight time of flight AS9421?
The scheduled flight time gate to gate is: 03:20 hours.
The real flight time gate to gate on average is: 04:39 hours.

Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in Seattle: 2026-02-24 10:43:48
Current Time in San Antonio: 2026-02-24 12:43:48

Alternative Flights

The following airline serve the same route between Seattle and San Antonio:
Alaska Airlines - Flight Number: AS494. (On Time performance: 69 - Average Delay: 15 minutes)

Punctuality and delays

We have gathered data from recent months and present below an analysis of how timely the flights have been.

In terms of On-Time Performance, by analyzing the flight data from the last three months, spanning from November 21, 2025 to February 17, 2026, we have obtained these figures.
Total number of flights: 17
On Time: 4 ( 24 % )
Moderate Delay: 4 ( 24 % )
Significant Delay: 3 ( 18 % )
Major Delay: 6 ( 35 % )
Canceled: 0 ( 0 % )
Diverted: 0 ( 0 % )

Average Delay: 45 minutes.
Delays analyzed by Weekday: We have gathered available data from last six months, spanning from August 21, 2025 to February 17, 2026. Next, you can observe the results broken down by day of the week: number of flights analyzed, on-time performance per day, and average delay per day.

Note: We have excluded some days from the graph, since the quantity and quality of the data is not representative enough.

Delays analyzed by Month: We have gathered available data from last twelve closed months, spanning from February 03, 2025 to January 27, 2026. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.

Note: We have excluded some months from the graph, since the quantity and quality of the data is not representative enough.

Last Past Flights AS9421

Date
Departure
Arrival
Duration
Aircraft
Status
Saturday
21 February
09:00 am
Seattle (SEA)
02:12 pm
San Antonio (SAT)
03h 12min
Boeing 737-800
Boeing 737-800
Tuesday
17 February
10:14 am
Seattle (SEA)
04:15 pm
San Antonio (SAT)
04h 01min
Boeing 737MAX
Boeing 737MAX
Landed - Delayed
Sunday
15 February
01:39 pm
Seattle (SEA)
09:06 pm
Greensboro/High Point (GSO)
05h 27min
Boeing 737-900
Boeing 737-900
Landed - On-time
Monday
09 February
11:01 am
Seattle (SEA)
05:17 pm
San Antonio (SAT)
04h 16min
Boeing 737MAX
Boeing 737MAX
Landed - Delayed
Saturday
07 February
11:03 am
Seattle (SEA)
05:02 pm
San Antonio (SAT)
03h 59min
Boeing 737-900
Boeing 737-900
Landed - Delayed
Sunday
01 February
08:46 am
Seattle (SEA)
02:39 pm
San Antonio (SAT)
03h 53min
Boeing 737MAX
Boeing 737MAX
Landed - On-time
Tuesday
27 January
11:31 am
Seattle (SEA)
05:19 pm
San Antonio (SAT)
03h 48min
Boeing 737-900
Boeing 737-900
Landed - On-time