London London LHR San Francisco SFO United Airlines Virgin Atlantic

SFO to London nonstop $421 round trip United or Virgin Atlantic, good late summer-fall travel deals

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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

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Virgin Atlantic San Francisco – London LHR – San Francisco SFO

$421.03 Mon Sep 16 – Wed Sep 25

a screenshot of a flight schedule

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