I don’t know why I did the math to answer your question, but I did. Please don’t upvote me, I don’t want encouragement for this behavior. Apparently 1% of th

I don’t know why I did the math to answer your question, but I did. Please don’t upvote me, I don’t want encouragement for this behavior. Apparently 1% of the total traffic in LAX in 2015 was for connecting flights to SFO [0]. Assuming this ratio didn’t change much in the following two year... considering LAX’s total traffic for 2017 was 84M [1] this means 840K people transferred from LAX to SFO. During 2017 3.5M people traveled from LAX to SFO.[2] This means about 24% of the traffic to SFO from LAX was for transferring flights. My numbers are clearly estimates because I couldn’t find a good record of every passenger itenary in the US which is what would be required for more the most accurate data. This also doesn’t cover passengers using SFO as a transfer station to LAX. Interesting enough JFK to LAX has recently become the most traveled route in the US with 30K more passengers a year than LAX to SFO, which contradicts my previous statements. [2] It’s possible LAX to SFO has more total flights, if you assume shorter flights use smaller airplanes. [0] https://www.anna.aero/2016/05/25/transfer-traffic-at-top-four-us-airports-analysed/ https://www.anna.aero/2016/05/25/transfer-traffic-at-top-fou... [1] https://www.lawa.org/-/media/lawa-web/statistics/market-share-statistics/m_share-2017.ashx?la=en&hash=C79B8AB1E2C0DE0C094A200E4010E8D6A2DBC519 https://www.lawa.org/-/media/lawa-web/statistics/market-shar... [2]https://en.m.wikipedia.org/wiki/List_of_busiest_passenger_air_routes https://en.m.wikipedia.org/wiki/List_of_busiest_passenger_ai...