We're in & out of SFO last week, weather is always a bit chilly in the morning & evening - just "wear" the jacket on the plane or hold it for the short flight on the turbo-prop. Coordinate your outfit as what's worn on your person on day 1 can be re-used on day 3, bring 1 full set of clothes - color coordinated for easy mix-n-match, maybe an extra blouse, roll them up, sleepwear & underwear, go easy on your 3-1-1 (or, use what's provided by the hotel if using one)

Put 1 or 2 scarf into the jacket pocket, along with smartphone/ipad/tablet charger - many leave the laptop behind unless traveling on business - pack medication needed. roll these up to avoid wrinkling and it should go easily into a small/medium size backpack/daypack or even folding canvas tote - so that it will fit into the ultra slim OH bin or seat in front of you.

Believe it or not, a friend of ours did a similar run and managed to put everything into a Macy's shopping tote with an extra nylon canvas tote - stayed with us so didn't even bothered with a 3-1-1, just a toothbrush and a hair brush. There's probably plenty of space for a cotton or silk sweater in there, if desired.