$647 - Direct Flights to London
Both Continental and United Airlines are offering direct flights to London from SFO for $647 including all taxes and fees.
Like all London flights, you need to be extra sure that your price quote includes airport taxes. London airport fees can be as much as $200 usually, not to mention fuel surcharges, etc.
Virgin Atlantic recently dropped their prices on direct flights to London from San Francisco as well, but their flights cost more than $700 (though much more enjoyable than flights with Continental or United).
Direct flights between San Francisco and London take just over 10 hours.
When flying out of London, don’t forget to give yourself a couple of hours to get through security. Heathrow airport in London can be particularly slow.
Book flights now on any of these airlines by doing a couple of flight searches here.