San Francisco to London at $421 round trip for nonstop flights with major airlines Virgin Atlantic or United Airlines are great deals for planning travel after mid-August.
United Airlines San Francisco – London LHR – San Francisco SFO nonstop
$421.03 round trip Monday Sep 9 – Thu Sep 19
Virgin Atlantic San Francisco – London LHR – San Francisco SFO
$421.03 Mon Sep 16 – Wed Sep 25
