Air France - Skyteam American Airlines AAdvantage British Airways Delta Airlines London London LHR Virgin Atlantic

Delta or BA $420-$428 SFO to London nonstop in May

a screenshot of a flight information

San Francisco to London tickets for travel in May 2019 are as low as $420 nonstop with Delta Economy Light flying Virgin Atlantic and one stop Air France/KLM return. British Airways nonstop tickets are as low as $428 with one stop itineraries as low as $400 round trip.

Departure dates: May, then low fares return in mid-August to November 2019.

Delta Airlines Economy Light ticket 

San Francisco – London LHR – Paris CDG – SFO

$419.83 round trip  Mon May 13 – Wed May 22

a screenshot of a flight schedule