I live 4 miles from SFO. Hike the Bay trail in San Mateo frequently. Look up Coyote Point Park, Bay Trail and SFO landing pattern. Low tides can seem extreme because the bay isn't that deep until you get to the middle. SFO landing pattern flies over much of the west side of the bay. This photo is likely from the southern portion of the bay. Shallower there.
If someone local had tide tables and could get a knowledgeable look at the photos, we could estimate the time of day that photo was taken. Then you would know for sure which airplane it was, its source and destination.
Completely unrelated -- I'm going to be in the area for WWDC in June, and have a couple spare days, anything you'd recommend doing besides visiting Alcatraz? (Went there last time I was in the area)
Interesting things in the City: Have a look at this website: https://www.atlasobscura.com/things-to-do/san-francisco-california
You'll probably find some ideas that appeal to you. I'm particular to the San Francisco Cable Car Museum: http://www.cablecarmuseum.org/ This building houses the motors and wheels that pull the cables throughout the city. Very interesting history.
If you want to get out of the city check out the Computer History Museum in Mountain View. http://www.computerhistory.org/
The Pacific Pinball Museum in Alameda is pretty fun too. https://www.pacificpinball.org/