I found out recently that there is a direct flight to New Delhi from San Francisco

About 3 weeks ago now my friends took this flight from San Francisco to New Delhi which is a direct 16 hour flight. However, the idea of a 16 hour flight at my age isn't something I would want to do. The longest flight so far that I have taken is about 12 hours from San Francisco to Incheon Airport in South Korea and eventually back when my son was teaching in South Korea then. 

I think flying from San Francisco over the polar route is about 11 or 12 hours too to either London or Amsterdam.