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 $269 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 September 2026. Set a free alert to catch the next price drop.
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.
Start monitoring for free →