Fares between San Francisco and London move every day as airlines adjust their pricing. Instead of checking manually, The Flight Agent watches this route for you 24/7 and emails you the moment the price drops below your budget — so you book at the dip, not the peak.
Set your target price once, and let the agent do the searching. It's free to start, monitors United Kingdom routes around the clock, and only pings you when there's a genuine deal.
Flights from San Francisco to London currently start from around $273 one-way. Prices change daily — The Flight Agent monitors this route 24/7 and alerts you when they fall.
The cheapest fares we're tracking right now depart around March 2027. Set a free alert to catch the next price drop.
Some San Francisco–London journeys are served nonstop while others connect through a major hub. When you search live fares on The Flight Agent you'll see both nonstop and one-stop options, so you can balance price against travel time.
For international routes, booking roughly 2–5 months ahead usually gives a good balance of price and availability. Set a free alert and we'll tell you the moment the San Francisco–London fare drops, so you don't have to guess.
Create a free scout on The Flight Agent. We monitor San Francisco–London around the clock and email you the instant the fare drops below your budget.
Set a free scout in seconds. We monitor San Francisco → London 24/7 and alert you the moment prices drop.
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