San Francisco London
San Francisco to London is one of the simplest transatlantic routes to book. Three carriers fly to Heathrow: British Airways, United, and Virgin Atlantic. All three leave in the evening, land the next morning. Ten and a half hours.
If you are buying business class, fly Virgin Atlantic. Upper Class is the best cabin of the three by a clear margin. BA Club World varies by aircraft. United Polaris is fine but not the reason you pick this flight.
In economy, three airlines competing on the same schedule keeps fares honest. Book whoever is cheapest.
If your flight cancels, the other two carriers almost certainly have seats leaving the same night. On most transatlantic routes you do not get that kind of backup.
The Elizabeth Line from Heathrow to Paddington takes 28 minutes. Tap your card and go. From Paddington you are one stop from the West End.
Have a specific need? Use the decision guide below to filter by your airline, where you live, lounges, or where you're staying in London.
Pick What Matters to You
Best pair by where you're coming from
Best pair by where you're staying in London
Which pair your airline flies nonstop
| Airline | SFO–LHR |
|---|---|
| Virgin Atlantic | ✓ |
| TWY | — |
| United Airlines | ✓ |
| British Airways | ✓ |
Ranked by on-time performance
Lounge access by airport and terminal
Ranked by flights per week
Getting to the airport
Red-eye vs daytime departures
Premium cabin options
Connecting through San Francisco from a domestic flight
Three carriers run nonstop from San Francisco International to Heathrow. Adding a connection saves money only in narrow scenarios: a European carrier routes you through its hub at a significantly lower fare, or you are departing from a smaller West Coast city without its own London service. From anywhere in the Bay Area, BART or a short drive reaches the airport. Connecting adds five or more hours to a 10-hour flight.
San Francisco & London Airport Profiles
Each airport has a personality. Terminal quality, transit access, lounge scene, and crowd levels vary dramatically — sometimes more than the flight itself.
San Francisco Metro
Four terminals connected by an automated AirTrain that loops the complex. The International Terminal anchors the west end with high ceilings and natural light. Three domestic terminals line the east side. The walk between the farthest domestic gate and the International Terminal takes about 15 minutes on the AirTrain, so leave time for connections across the complex.
BART sits one level below the International Terminal departures hall, making transit access straightforward on the international side and a short AirTrain ride from the domestic gates. Security lines can run long during afternoon departure banks when transpacific flights cluster together.
The airport sits on the bay, and marine layer fog is a regular summer feature. Morning departures in June through August can push 30 to 60 minutes. Afternoon flights are typically clear. If on-time departure matters, book the afternoon.
Compact and straightforward. One main terminal building with two concourse areas. Security lines move quickly, and the walk from the curb to any gate rarely exceeds 10 minutes. The airport handles less traffic than its neighbors, which keeps the experience low-stress for departures and arrivals alike.
The BART connection runs via an elevated people mover from the Coliseum station to the terminal, adding about 8 minutes to the rail journey. Inside, the terminal is older and simpler but functional. Food and shopping options are limited compared to larger airports in the region.
London Metro
Heathrow has four active terminals and your airline determines which one you use. Terminal 5 is British Airways territory, the newest and most polished. Terminal 2, the Queen's Terminal, handles Star Alliance carriers. Terminal 3 has Virgin Atlantic and several US carriers. Terminal 4 is smaller and serves a mix of international airlines.
The terminals are not walkable between each other. Free inter-terminal transfers run on the Elizabeth Line or Heathrow Express between T2/T3 (which share a central area) and T5. T4 requires a separate bus. Build in 60 minutes if you need to change terminals for a connection.
Immigration at 6 to 8 AM is slow. The morning wave of transatlantic red-eyes all land in the same window, and queues back up. E-gates work for US passport holders, which helps, but the volume is real. The airport is well-signed and functional, not beautiful. Shopping is extensive if you clear customs early.
Luton is a single-terminal airport 35 miles north of central London that has been undergoing expansion. The DART people-mover opened in 2023, replacing the old shuttle bus from the Luton Airport Parkway rail station. That shuttle bus was always the weakest link in getting to central London from Luton, and the DART fixes it.
The terminal is compact and functional. It serves mostly budget carriers on European routes. Any transatlantic service from New York is rare and seasonal. The airport handles fewer passengers than Heathrow, Gatwick, or Stansted, and it shows in the smaller food and retail options.
Luton works well for travelers headed to the north side of London, Bedfordshire, or the Midlands. For everyone else, the distance to central London and the limited flight options make it primarily a budget carrier airport.
No high-frequency connections found. Check LTN routes for all options.
Gatwick has two terminals, North and South, connected by a free shuttle train that takes about two minutes. South Terminal is the larger of the two and handles most scheduled long-haul flights. North Terminal serves a mix of short-haul and charter carriers.
The airport is smaller than Heathrow and easier to navigate. Security queues are generally shorter except during summer holiday peaks. The walk from security to gates in South Terminal is short. The overall experience is less stressful than Heathrow, which is part of the appeal for budget travelers.
Gatwick sits 30 miles south of central London, roughly twice the distance of Heathrow. The Gatwick Express runs to Victoria in 30 minutes, which is competitive, but Victoria is not as well connected to east London as Paddington.
Stansted is a single-terminal airport designed by Norman Foster, and the building itself is worth noticing. The roof structure is a clean white canopy held up by trees of steel columns. It opened in 1991 and still looks modern. The terminal is compact and navigation is straightforward.
Stansted is a budget carrier hub. Ryanair dominates the departure boards. Long-haul service is limited. Most traffic is European short-haul on budget carriers. The airport does one thing well: move large numbers of passengers through a simple layout with short walking distances.
It sits 40 miles northeast of central London, the farthest of the four London airports from the city. The Stansted Express runs to Liverpool Street in 47 minutes, which is reasonable, but you are starting from much farther out.
No high-frequency connections found. Check STN routes for all options.
London Southend is a small regional airport in Essex with a train station attached directly to the terminal building. The terminal handles a limited number of routes. Security queues rarely take more than 10 minutes, and the walk from the entrance to the gate is short.
The departures area past security has a few shops and food outlets. Do not expect the range of a larger airport. What Southend offers is speed: if you live nearby, you can leave home an hour before departure and make the flight.
London City Airport is the smallest of London's six airports, sitting in the Royal Docks between Canary Wharf and the Thames Barrier. The terminal is compact: one security area leads to a small departures lounge with views of the runway. You can arrive 30 minutes before a domestic flight and make it comfortably.
The runway is short, which limits the airport to smaller aircraft types. The approach is steep, which some passengers notice on landing. The upside of the small scale: no long walks to gates, no terminal train, no maze of corridors. A small selection of restaurants and shops sits airside.
Full Comparison
Every airport combination ranked by schedule depth. SFO–LHR carries 99% of weekly flights with the best on-time record. The remaining 2 pairs share 1% between them.
Which Airlines Fly Which Pairs
Not all planes are the same size. The aircraft type below each checkmark tells you whether you are getting a widebody (777, 787, A350) with wider seats and a quieter ride, or a narrowbody (737, A321) with a single aisle. On flights over five hours, the difference is significant.
A380, 777-300ER
777-200, 787-9
A350-1000, 787-9