Cheap Flights from London to San Francisco — $679

Flights from London to San Francisco are operated by several airlines — British Airways and Brussels Airlines. This allows passengers to flexibly choose flights based on departure time, cost, and additional services. The minimum ticket price starts at $679, making this destination accessible to travelers with different budgets. We help compare all available options in real time, so you can book tickets at the best value for money. The service ensures transparent search and lets you book affordable flights in just a few clicks.

London is served by several distinct airports that cater to different needs. Heathrow, west of central London, is the main international hub and typically handles long-haul and premium carriers; it’s usually pricier to fly into but offers extensive connections. Gatwick, south of the city, often mixes full-service and leisure airlines and can be a budget-friendly alternative for many routes. Stansted and Luton, to the northeast and northwest respectively, are primarily used by low-cost and charter airlines and can be cheaper, though travel times are longer. London City Airport, much closer to the financial district, is compact and frequented by business travelers with limited aircraft types. Transport links vary by airport: Heathrow is about 15–20 miles from central London with the fastest option being the Heathrow Express to Paddington in roughly 15–25 minutes (typically higher fare), while the Underground (Piccadilly Line) takes around 40–60 minutes for lower fares. Gatwick is roughly 25–30 miles away; the Gatwick Express reaches Victoria in about 30 minutes, with slower rail options and coach services available at lower cost. Stansted and Luton generally require 45–75 minutes by train or coach depending on traffic, with airport shuttle buses and frequent regional trains; fares commonly range from budget coach prices to moderate rail rates. London City is only a few miles from Canary Wharf and the West End, often 15–30 minutes by DLR and Tube with modest fares. Each airport has trade-offs: Heathrow and Gatwick offer broad airline choice and smoother transfer options but can be busier and often more expensive for ground transport; Stansted and Luton can yield lower airfares though ground transfers may add time and uncertainty; London City is very convenient for central business areas but has limited long-haul services and stricter aircraft size rules. Travelers can usually balance ticket cost against total journey time and convenience when choosing which London airport to use.

San Francisco International (SFO) is the region’s main international hub, serving legacy carriers and many global and transcontinental routes alongside a growing number of low-cost long-haul options. Located about 13 miles south of downtown San Francisco, it’s typically reached by BART in roughly 30–40 minutes (fares usually in the mid-single-digit dollars) or by car/taxi in 25–45 minutes depending on traffic (higher fares for airport surcharge and tolls). Ground transport also includes express buses, ride-shares, and airport shuttles. Pros: plentiful international connections, frequent public transit to the city, and full-service amenities. Cons: can be busy and subject to traffic and occasional security wait times.