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

AS638 Alaska Airlines - Flight Status

Codeshare Flights
The flight QR3421 from Qatar Airways (QR) is a codeshare flight operated by Alaska Airlines (AS) under the flight number AS638. Check this page for details about flight AS638.

Below, you can find details about Alaska Airlines flight AS638, which currently operates between the airports of Seattle - Seattle-Tacoma International Airport (Airport Code SEA) and Tucson - Tucson International Airport (Airport Code TUS).
This flight data pertains specifically to the flight's details for Friday, October 10, 2025.

AS638 On Time performance:
n/a
It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions.

Flight Status

AS638 Alaska Airlines to Tucson

Scheduled
Flight Status for Friday October 10, 2025
This flight is also scheduled for Today (October 09, 2025). See it here

Airline information

Alaska Airlines
Alaska Airlines
Equipment: Boeing 737-900 (winglets) Passenger/BBJ3

Departure

Seattle (SEA)
October 10, 2025
Seattle-Tacoma International Airport
Scheduled Departure Time:
08:30 pm
Gate:
-
Scheduled Departure Time: 08:30 pm

Arrival

Tucson (TUS)
October 10, 2025
Tucson International Airport
Scheduled Arrival Time:
11:34 pm
Terminal:
-
Gate:
-
Scheduled Arrival Time: 11:34 pm
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.

Codeshare Flights

This flight is shared with other airlines, this means that these other flights are the same:

- HA6945 - Hawaiian Airlines

- QR3421 - Qatar Airways

- TN2683 - Air Tahiti Nui

Additional Information

Which is the frequency of flight AS638?
The flight AS638 is scheduled to flight on Monday, Thursday, Sunday on a weekly basis.

Which is the distance of flight AS638?
The distance between the two airports is 1216 miles.

Are the departure airport and arrival airport at the same Time Zone?
Yes, both airports are in the same timezone.

Alternative Flights

The following airlines serves the same route between Seattle and Tucson:

Alaska Airlines
- Flight Number: AS3475. (On Time performance: 73 - Average Delay: 14 minutes)
- Flight Number: AS648. (On Time performance: 97 - Average Delay: 3 minutes)

Delta Air Lines
- Flight Number: DL3619. (On Time performance: 96 - Average Delay: 4 minutes)

Punctuality and delays

It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions.

Delays analyzed by Week: It is not possible to calculate the On-Time Performance for this flight accurately by weekday due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Delays analyzed by Month: We have gathered available data from last twelve closed months, spanning from October 29, 2024 to November 20, 2024. 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 AS638

Date
Departure
Arrival
Duration
Aircraft
Status
Monday
06 October
08:38 pm
Seattle (SEA)
11:32 pm
Tucson (TUS)
02h 54min
Boeing 737-900
Boeing 737-900
Landed - On-time
Sunday
05 October
08:37 pm
Seattle (SEA)
11:30 pm
Tucson (TUS)
02h 53min
Boeing 737MAX
Boeing 737MAX
Landed - On-time