Home Slickdeals San Francisco to London $390-$399 RT Nonstop Airfares on Norwegian Air, British... Slickdeals San Francisco to London $390-$399 RT Nonstop Airfares on Norwegian Air, British Airways/American Airlines (Limited Travel Nov 2019) By ARCOM - 30 April 2019 129 0 SHARE Facebook Twitter Go to the deal page: San Francisco to London $390-$399 RT Nonstop Airfares on Norwegian Air, British Airways/American Airlines (Limited Travel Nov 2019)