Oneworld Alliance airline Finnair flies San Francisco to Helsinki, Finland nonstop with an 11-hour flight. There are currently Finnair one-stop tickets SFO to Vienna for $496 round trip with a quick layover connection in Helsinki for flights in late October and November. There are more flight options similarly priced into 2020 with American Airlines and British Airways via London.
Finnair San Francisco – Helsinki HEL – Vienna VIE – HEL – SFO
$495.53 round trip Fri Nov 8 – Fri Nov 15
