Flights for AS421 These are not all the flights that AS421 has taken, just some of them that have flown in or out of SFO

AS421 (SFO-SEA)
This Alaska Airlines flight traveled from San Francisco International Airport to Tacoma International Airport, on April 30, 2020. See all the flights for AS421.
AS421 (SFO-SEA)
This Alaska Airlines flight traveled from San Francisco International Airport to Tacoma International Airport, on April 29, 2020. See all the flights for AS421.
AS421 (SFO-SEA)
This Alaska Airlines flight traveled from San Francisco International Airport to Tacoma International Airport, on April 27, 2020. See all the flights for AS421.
AS421 (SFO-SEA)
This Alaska Airlines flight traveled from San Francisco International Airport to Tacoma International Airport, on April 26, 2020. See all the flights for AS421.
AS421 (SFO-SEA)
This Alaska Airlines flight traveled from San Francisco International Airport to Tacoma International Airport, on April 24, 2020. See all the flights for AS421.
AS421 (SFO-SEA)
This Alaska Airlines flight traveled from San Francisco International Airport to Tacoma International Airport, on April 23, 2020. See all the flights for AS421.
AS421 (SFO-SEA)
This Alaska Airlines flight traveled from San Francisco International Airport to Tacoma International Airport, on April 22, 2020. See all the flights for AS421.
AS421 (SFO-SEA)
This Alaska Airlines flight traveled from San Francisco International Airport to Tacoma International Airport, on January 06, 2020. It departed from gate D4. See all the flights for AS421.
AS421 (SFO-SEA)
This Alaska Airlines flight traveled from San Francisco International Airport to Tacoma International Airport, on January 04, 2020. It departed from gate D5. Passengers were flying aboard a Boeing 737-900 with tail number N296AK. See all the flights for AS421.
AS421 (SFO-SEA)
This Alaska Airlines flight traveled from San Francisco International Airport to Tacoma International Airport, on January 03, 2020. It departed from gate D16. See all the flights for AS421.
AS421 (SFO-SEA)
This Alaska Airlines flight traveled from San Francisco International Airport to Tacoma International Airport, on January 02, 2020. It departed from gate D5. See all the flights for AS421.
AS421 (SFO-SEA)
This Alaska Airlines flight traveled from San Francisco International Airport to Tacoma International Airport, on January 01, 2020. It departed from gate D3. See all the flights for AS421.

All these flight data are available as openly licensed data on the sfomuseum-data GitHub account. If you'd like to read more about our efforts to archive flight data at SFO Museum have a look a the Mills Field weblog posts tagged "flightdata".