Flights for WN4020 These are not all the flights that WN4020 has taken, just some of them that have flown in or out of SFO

WN4020 (SFO-SAN)
This Southwest Airlines flight traveled from San Francisco International Airport to San Diego International Airport, on June 08, 2021. It departed from gate B9. See all the flights for WN4020.
SWA4020 (SAN-SFO)
This Southwest Airlines flight traveled from San Diego International Airport to San Francisco International Airport, on September 07, 2012. Passengers were flying aboard a Boeing 737-700. See all the flights for WN4020.
SWA4020 (SFO-SAN)
This Southwest Airlines flight traveled from San Francisco International Airport to San Diego International Airport, on September 07, 2012. Passengers were flying aboard a Boeing 737-700. See all the flights for WN4020.

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".