Cheap flights from San Francisco (SFO) to London (LON) from $217

This is the cheapest one-way flight price, found on 9/27. Prices may vary by date and flight preferences.
SFO — LON
Oct 3 — Oct 101

The best prices from San Francisco to London are usually found in March or February, booked 60 days in advance, depart on a Tuesday or Thursday and return on a Thursday

How to find the cheapest flight from San Francisco (SFO) to London (LON)

All the information you need to plan the best SFO to LON flight in 2023: compare San Francisco to London flight prices with the expected peak season, weather and rainfall in London.

Popular in

July

Cheapest in

March

Round-trip from

$618

One-way from

$284
High demand for flights, 27% potential price rise
Best time to find cheap flights, 16% potential price drop
From San Francisco to London (LON)
One-way flight from San Francisco to London (LON)

SFO - LON

Price

$618 - $1,177

LON

Temperature

39.2 - 62.6 °F

LON

Rainfall

1.6 - 2.8 inches

What is the cheapest day to fly round-trip from San Francisco to London?

Leaving on a Monday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 14% on the overall cost on flights from San Francisco to London.

How far in advance should I book a flight from San Francisco to London?

Find a great deal and save up to 19% by booking at least 60 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from San Francisco to London within the next two weeks, with the cheapest ticket starting at $988.

What is the cheapest month to fly from San Francisco to London?

March is one of the best times of the year to fly to London from San Francisco. Prices for March average $821 per person but you can even find prices for as low as $580. The most expensive prices can be found in the month of July. Opting for a March flight can save you 36% on your journey compared to booking in July

When is the cheapest time to fly from San Francisco to London (SFO - LON)?

One of the essential ways to save on airfare from San Francisco to London is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 7% on airfare.

Cheap United Airlines flights from San Francisco to London

Take a peek at the cheapest United Airlines flights we've detected traveling from San Francisco to London. Make sure to double check the flight details before booking.
  • If you’re traveling from San Francisco to London, one of the more common airlines traveling that route is United Airlines. Flights from United Airlines traveling this route typically cost $825.25 RT. This price is typically 78% more expensive than other airlines that offer San Francisco to London flights. When booking this route, the cheapest RT price found was $583. The most popular departure airport in San Francisco when flying to London is San Francisco Airport. The most popular airport to fly into when visiting London is London Heathrow Airport. When flying from San Francisco to London, United Airlines flights are 5% more popular than any other airline flying that same route.

Cheap Delta flights from San Francisco to London

Some of the lowest-priced Delta flights we've found at this time heading from San Francisco to London. Check back soon if you're not seeing flights that suit your needs.
  • One of the most popular airlines traveling from San Francisco to London is Delta. Flights from Delta traveling this route typically cost $1,071.10 RT. This price is typically 61% cheaper than other airlines that offer San Francisco to London flights. When booking this route, the cheapest RT price found was $604. San Francisco Airport is the most common San Francisco airport to take off from when flying to London. London Heathrow Airport is the most popular arrival airport in London. When flying from San Francisco to London, Delta flights are 1% more popular than any other airline flying that same route.

Cheap San Francisco to London flights in September & October 2023

The best prices found for SFO to LON flights for September, October
The lowest fares we've come across on flights traveling from San Francisco to London in September and October 2023. For more flight deals, be sure to check back very soon.

San Francisco to London 2023 flight deals

Cheap flights to London from San Francisco found for this year
The lowest fares we've come across on flights traveling from San Francisco to London in September and October 2023. For more flight deals, be sure to check back very soon.

Non-stop flights to London from San Francisco

Save time with San Francisco to London direct flight deals
For a shorter flight, select one of these non-stop flights from San Francisco to London. Users seeking other options on flights from San Francisco to London should update the search form at the top of the page.

San Francisco to London flights leaving soon

Late deals on return flights to London from San Francisco, departing today and this week
Have a look at some of the last-minute flights available departing from San Francisco to London. To prevent any unwanted surprises, users should verify their flight info before booking.

One-way flights to London from San Francisco

The cheapest one-way flights from San Francisco to London
If you're seeking multiple options on one-way flights from San Francisco to London, be sure to check out these deals, which are updated often. Users needing a return flight from San Francisco to London should utilize the search form above.

Find flights from San Francisco to London within your budget

Use the slider to find flights from San Francisco to London that fit your budget.

Fly from

Any airport

Fly to

Any airport

Budget

$469 - $615

Route

Depart

Return

Price

San FranciscoLondon Gatwick

SFO - LGW

SFOLGW

San Francisco

Sat 2/10

2 stops20h 15m

London Gatwick

Mon 2/12

1 stop29h 40m

San FranciscoLondon Heathrow

SFO - LHR

SFOLHR

San Francisco

Wed 11/1

1 stop15h 25m

London Heathrow

Wed 11/8

1 stop16h 10m

San FranciscoLondon Gatwick

SFO - LGW

SFOLGW

San Francisco

Wed 10/25

2 stops18h 35m

London Gatwick

Tue 10/31

2 stops35h 49m

San FranciscoLondon Gatwick

SFO - LGW

SFOLGW

San Francisco

Tue 12/5

1 stop27h 00m

London Gatwick

Wed 4/24

1 stop28h 50m

San FranciscoLondon Heathrow

SFO - LHR

SFOLHR

San Francisco

Wed 10/11

Nonstop10h 25m

London Heathrow

Wed 10/18

2 stops22h 00m

San FranciscoLondon Gatwick

SFO - LGW

SFOLGW

San Francisco

Tue 10/31

1 stop13h 05m

London Gatwick

Sat 11/11

1 stop14h 40m

San FranciscoLondon Heathrow

SFO - LHR

SFOLHR

San Francisco

Thu 10/26

1 stop14h 55m

London Heathrow

Thu 11/2

Nonstop11h 10m

San FranciscoLondon Heathrow

SFO - LHR

SFOLHR

San Francisco

Tue 10/31

Nonstop10h 25m

London Heathrow

Tue 11/7

Nonstop11h 20m

San FranciscoLondon Gatwick

SFO - LGW

SFOLGW

San Francisco

Thu 10/19

1 stop15h 10m

London Gatwick

Thu 10/26

1 stop19h 37m

Flights are sorted by cheapest first

Deals found on 9/28

Reviews of airlines servicing London

To help decide which airline to fly from San Francisco to London, see what other customers have to say about United Airlines, Delta and TAP AIR PORTUGAL. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
3,023 reviews

Boarding

8.0

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Reviews

1 / 10

Most importantly it was on time, then great crew, great service and comfortable.

Delta
7.9
Good
3,023 reviews
Delta
7.9
Good
3,023 reviews

Boarding

8.0

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Reviews

1 / 10

Most importantly it was on time, then great crew, great service and comfortable.

Air France
7.6
Good
274 reviews
Delta
7.9
Good
3,023 reviews

Boarding

8.0

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Reviews

1 / 10

Most importantly it was on time, then great crew, great service and comfortable.

Norse Atlantic UK
7.6
Good
5 reviews
Delta
7.9
Good
3,023 reviews

Boarding

8.0

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Reviews

1 / 10

Most importantly it was on time, then great crew, great service and comfortable.

Finnair
7.5
Good
342 reviews
Delta
7.9
Good
3,023 reviews

Boarding

8.0

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Reviews

1 / 10

Most importantly it was on time, then great crew, great service and comfortable.

KLM
7.5
Good
196 reviews
Delta
7.9
Good
3,023 reviews

Boarding

8.0

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Reviews

1 / 10

Most importantly it was on time, then great crew, great service and comfortable.

Related info for your journey

Useful info, stats and facts about San Francisco to London flights.

What airport do you fly from for flights from San Francisco to London?

Most people fly from San Francisco (SFO) if they book a flight from San Francisco to London. On average, San Francisco has 28 outbound flights to London per day from 22 airlines. San Francisco is conveniently located just 11.8 mi from San Francisco’s city center.

Can I find flights from San Francisco to London for under $500 on Cheapflights?

Yes, there are multiple flights from San Francisco to London for under $500. The cheapest flight booked recently is on TAP AIR PORTUGAL for just $469, but on average you can expect to pay $517.

Are there nonstop flights from San Francisco to London for under $600 on Cheapflights?

Cheapflights has at least 20 direct flights from San Francisco to London under $600. A good price for a nonstop flight from San Francisco to London is less than $632.

Are there last-minute flights available from San Francisco to London for under $600?

There are currently 20+ open flights from San Francisco to London within the next 7 days for less than $600.

What days are nonstop flights available from San Francisco to London?

Nonstop flights are available for this route on the following days: Monday, Saturday.

How many flights depart from San Francisco to London on average per day?

On average 1 flight departs from San Francisco to London per day.
Afternoon (Noon - 6pm) - 100% of flight departures

How long is the flight from San Francisco to London?

A quick flight from San Francisco to London can take about 15h 25m. TAP AIR PORTUGAL provides one of the quickest options available for as low as $469. The distance between San Francisco and London is about 5383 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines flying from San Francisco to London round-trip?

Currently priced at $469, TAP AIR PORTUGAL will fly you from San Francisco to London and back. In addition to TAP AIR PORTUGAL, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Scandinavian Airlines for as low as $526. You may be able to fly from San Francisco to London for 42% less than the average price by searching for these airlines.

What are the most popular routes from San Francisco to London?

What are the most popular airlines that fly from San Francisco to London?

What are the most reliable airlines from San Francisco to London?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from San Francisco to London on time: Air Canada (76%), Austrian Airlines (76%), United Airlines (76%).

What are the cheapest flights from San Francisco to London?

On average you can expect to pay $1,575 for a flight from San Francisco to London. The cheapest flight overall is $299 while the most popular route, (San Francisco - London Heathrow) is currently priced at $505.

What does SFO to LHR mean?

Great question - SFO to LHR just means San Francisco Airport to London Heathrow Airport. Now you’ll know what these unique codes when you look for flights! London Gatwick Airport (LGW), London Stansted Airport (STN), London City Airport (LCY), London Luton Airport (LTN), London Southend Airport (SEN) are other airports near this flight route and their unique identifiers/IATA codes.

Top 10 airlines flying from San Francisco to London

The chart below displays the airlines Cheapflights users traveling from San Francisco to London choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest$269Average$555FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
TAP AIR PORTUGALCheapest$456Average$724FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
LufthansaCheapest$483Average$830FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Scandinavian AirlinesCheapest$492Average$579FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Aer LingusCheapest$555Average$806FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Brussels AirlinesCheapest$559Average$872FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
FinnairCheapest$570Average$783FlexibilityNo cancel feeOn-time76%
Search Finnair flights
SWISSCheapest$574Average$943FlexibilityNo cancel feeOn-time79%
Search SWISS flights
DeltaCheapest$583Average$825FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IberiaCheapest$587Average$763FlexibilityNo cancel feeOn-time77%
Search Iberia flights

Fly your favorite airline from San Francisco

Hourly flight availability from San Francisco to London

See what time of day planes typically take off from San Francisco to London
1%of flight departuresEarly morningMidnight to 6 am
17%of flight departuresMorning6 am to noon
39%of flight departuresAfternoonNoon to 6 pm
43%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from San Francisco to London

See how many times per day planes take to the skies headed from San Francisco to London
Sunday26daily flights
Monday31daily flights
Tuesday26daily flights
Wednesday31daily flights
Thursday26daily flights
Friday31daily flights
Saturday31daily flights

Fly with Cheapflights

What makes Cheapflights the go-to destination for all your flight needs

How does Cheapflights help users find flights from San Francisco to London?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to London from San Francisco today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from San Francisco to London?

Cheapflights helps you find that perfect flight to London from San Francisco by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from San Francisco to London with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from San Francisco to London, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from San Francisco to London become cheaper?

Yes, Cheapflights does offer price alerts on San Francisco to London flights so you can book your travels when it’s right. The Price Alert feature is available after a flight search is performed above.

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