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

Our cheapest airline available from San Francisco to London is SWISS. Our recent data shows that you can find tickets from as low as £429 on this airline. Additional options worth looking into are Lufthansa and United Airlines, starting at £429 and £429 round-trip. SWISS is currently priced 22% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from San Francisco to London one-way?

For one-way options, check prices for Iberia. According to our data, you can fly for as low as £272. Users have also found prices from £273 and £273 on SWISS and Vueling, respectively.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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

While some choose either San Francisco - London Gatwick or San Francisco - London City, San Francisco - London Heathrow is the most popular route from San Francisco to London.

What are the cheapest flights from San Francisco to London?

Looking at all options, your cheapest flight can be booked for £263. While the most popular route (San Francisco - London Heathrow) can be booked for £306 on average our data indicates £1,856 when flying from San Francisco to London.

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

Before booking your flight to London from San Francisco, check out the most reliable airlines to get you to your destination on time: Aeromexico (83%), Air France (83%), Delta( 83%).

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

Before booking your flight from San Francisco to London check out the most popular airlines for this route: Air Canada, British Airways or Iberia.

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

Friday flights are generally found to be more expensive for flights from San Francisco to London. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London.

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

Find a great deal and save up to 31% by booking at least 39 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 £510.

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

Flights from San Francisco to London lean towards being more expensive in June. Prices are generally better when you fly from San Francisco to London in October, with the cheapest ticket starting at £376.

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

Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to London from San Francisco. Booking flights from San Francisco (SFO) to London should be relatively easy as there are 41 daily outbound flights to London from 8 different airlines.

Can I find deals for flights from San Francisco to London that include hotel bookings?

Yes. In addition to deals on San Francisco to London flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from San Francisco to London?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to London.

Can I find deals for business class flights from San Francisco to London?

Yes. Cheapflights offers flight deals from San Francisco to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£271+ Flights from San Francisco to London

Cheapflights Tip: The best prices from San Francisco to London are usually found in October or September, booked 38 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from San Francisco to London

Round-trip from	£429
One-way from	£271
Popular in	June
Cheapest in	October
Average price	£670
Good round-trip deal	£432 or less
Good one-way deal	£284 or less

SWISS
27/11-1/12
2 total stops
44h 10m total
San Francisco to London

Search Deals

10/9
2 total stops
20h 20m total
San Francisco to London

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (£83 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).

Search Deals

Average for round-trip flights in July 2025

Search Deals

Price to beat on a round-trip flight from San Francisco to London (LON).

Search Deals

Price to beat on a one-way flight from San Francisco to London (LON).

Search Deals

Find flight deals from San Francisco to London

Cheapest flights from San Francisco to London
Explore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 July 2025.

Mon 13/1019:40SFO - LCY

1 stop13h 35mSWISS

Sun 26/1019:20LCY - SFO

1 stop29h 05mSWISS

Deal found 30/6£429

Thu 21/816:20SFO - LGW

2 stops22h 50mMultiple Airlines

Tue 2/916:50LGW - SFO

2 stops29h 45mMultiple Airlines

Deal found 30/6£429

Tue 19/821:05SFO - LHR

1 stop14h 35mLufthansa

Thu 4/907:25LHR - SFO

1 stop19h 35mLufthansa

Deal found 30/6£429

Wed 16/707:00SFO - LHR

1 stop14h 55mUnited Airlines

Wed 13/811:25LHR - SFO

2 stops15h 59mUnited Airlines

Deal found 30/6£429

Mon 18/821:05SFO - LHR

2 stops15h 50mBrussels Airlines

Tue 26/806:50LHR - SFO

2 stops44h 10mBrussels Airlines

Deal found 30/6£432

Fri 22/813:55SFO - LHR

2 stops56h 35mAustrian Airlines

Wed 3/912:40LHR - SFO

2 stops40h 13mAustrian Airlines

Deal found 30/6£432

Mon 1/1216:35SFO - LGW

1 stop33h 15mTAP AIR PORTUGAL

Sun 7/1221:25LGW - SFO

2 stops25h 10mTAP AIR PORTUGAL

Deal found 30/6£433

Tue 15/713:45SFO - LHR

1 stop13h 00mMultiple Airlines

Fri 15/806:15LHR - SFO

1 stop14h 35mMultiple Airlines

Deal found 30/6£433

Tue 15/713:45SFO - LCY

1 stop21h 55mVirgin Atlantic

Wed 17/920:10LCY - SFO

1 stop23h 35mVirgin Atlantic

Deal found 30/6£434

Thu 11/919:20SFO - LHR

Nonstop10h 25mBritish Airways

Sun 14/910:45LHR - SFO

Nonstop11h 05mBritish Airways

Deal found 30/6£434

Wed 13/819:30SFO - LGW

1 stop14h 25mSWISS

Wed 27/818:35LGW - SFO

1 stop29h 35mSWISS

Deal found 30/6£435

Mon 18/817:45SFO - STN

1 stop13h 35mMultiple Airlines

Mon 25/806:25STN - SFO

1 stop17h 30mMultiple Airlines

Deal found 30/6£439

Best flights from San Francisco to London
Discover carefully curated flight deals from San Francisco to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 July 2025.

Thu 27/1119:25SFO - LGW

1 stop14h 25mSWISS

Mon 1/1218:40LGW - SFO

1 stop29h 45mSWISS

Deal found 30/6£429

Tue 19/821:05SFO - LHR

1 stop14h 35mLufthansa

Thu 4/907:25LHR - SFO

1 stop19h 35mLufthansa

Deal found 30/6£429

Wed 16/707:00SFO - LHR

1 stop14h 55mUnited Airlines

Wed 13/811:25LHR - SFO

2 stops15h 59mUnited Airlines

Deal found 30/6£429

Thu 11/905:50SFO - LGW

1 stop21h 05mMultiple Airlines

Sat 20/909:50LGW - SFO

1 stop18h 47mMultiple Airlines

Deal found 30/6£430

Mon 18/821:05SFO - LHR

2 stops15h 50mBrussels Airlines

Tue 26/806:50LHR - SFO

2 stops44h 10mBrussels Airlines

Deal found 30/6£432

Fri 22/813:55SFO - LHR

2 stops56h 35mAustrian Airlines

Wed 3/912:40LHR - SFO

2 stops40h 13mAustrian Airlines

Deal found 30/6£432

Mon 1/1216:35SFO - LGW

1 stop33h 15mTAP AIR PORTUGAL

Sun 7/1221:25LGW - SFO

2 stops25h 10mTAP AIR PORTUGAL

Deal found 30/6£433

Tue 15/713:45SFO - LCY

1 stop19h 35mVirgin Atlantic

Wed 17/919:00LCY - SFO

1 stop24h 45mVirgin Atlantic

Deal found 30/6£434

Thu 11/919:20SFO - LHR

Nonstop10h 25mBritish Airways

Sun 14/910:45LHR - SFO

Nonstop11h 05mBritish Airways

Deal found 30/6£434

Wed 16/709:35SFO - LGW

1 stop16h 25mDelta

Wed 13/812:00LGW - SFO

1 stop19h 49mDelta

Deal found 30/6£442

Fri 31/1013:20SFO - LHR

1 stop15h 30mAir Canada

Sat 8/1108:55LHR - SFO

2 stops19h 55mAir Canada

Deal found 30/6£443

Fri 12/913:21SFO - LHR

1 stop13h 09mIberia

Sun 21/916:25LHR - SFO

1 stop15h 50mIberia

Deal found 30/6£462

Direct flights from San Francisco to London
Explore direct flight options from San Francisco to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 1 July 2025.

Sun 20/719:20SFO - LHR

Nonstop10h 25mBritish Airways

Mon 18/810:45LHR - SFO

Nonstop11h 05mBritish Airways

Deal found 30/6£432

Sat 12/721:20SFO - LHR

Nonstop10h 20mDelta

Wed 17/911:15LHR - SFO

Nonstop11h 00mDelta

Deal found 30/6£441

Tue 16/1222:20SFO - LHR

Nonstop11h 25mVirgin Atlantic

Tue 30/1217:10LHR - SFO

Nonstop10h 20mVirgin Atlantic

Deal found 29/6£446

Thu 21/816:00SFO - LHR

Nonstop10h 25mUnited Airlines

Sat 6/916:15LHR - SFO

Nonstop11h 00mUnited Airlines

Deal found 29/6£452

Tue 19/816:30SFO - LHR

Nonstop10h 25mIberia

Thu 4/914:15LHR - SFO

Nonstop11h 10mIberia

Deal found 30/6£473

Last-minute flights from San Francisco to London
Discover last-minute flight deals from San Francisco to London. Data last updated 1 July 2025 and is based on user searches.

Sat 5/723:50SFO - LHR

1 stop25h 35mIberia

Sat 11/1014:45LHR - SFO

1 stop14h 40mIberia

Deal found 27/6£443

Sat 5/723:59SFO - LHR

1 stop25h 01mBritish Airways

Tue 5/819:40LHR - SFO

1 stop21h 36mBritish Airways

Deal found 28/6£447

Mon 7/717:45SFO - LHR

1 stop13h 10mAer Lingus

Fri 8/807:40LHR - SFO

1 stop16h 10mAer Lingus

Deal found 27/6£471

Mon 7/719:40SFO - LHR

1 stop14h 10mSWISS

Mon 21/706:00LHR - SFO

2 stops41h 18mSWISS

Deal found 29/6£472

Mon 7/719:40SFO - LHR

1 stop18h 00mScandinavian Airlines

Tue 19/821:05LHR - SFO

2 stops27h 25mScandinavian Airlines

Deal found 30/6£505

Tue 8/709:35SFO - LHR

1 stop15h 15mKLM

Tue 5/820:10LHR - SFO

1 stop30h 55mKLM

Deal found 28/6£458

Tue 8/709:35SFO - LGW

1 stop16h 25mDelta

Tue 22/712:00LGW - SFO

1 stop16h 53mDelta

Deal found 30/6£478

Tue 8/719:30SFO - LGW

1 stop14h 20mSWISS

Wed 23/718:35LGW - SFO

2 stops34h 19mSWISS

Deal found 28/6£492

Wed 9/707:05SFO - LHR

1 stop15h 20mDelta

Tue 5/810:55LHR - SFO

2 stops21h 08mDelta

Deal found 30/6£429

Wed 9/721:20SFO - LHR

Nonstop10h 20mVirgin Atlantic

Mon 18/806:30LHR - SFO

1 stop13h 15mVirgin Atlantic

Deal found 28/6£454

Wed 9/709:35SFO - LGW

1 stop16h 25mVirgin Atlantic

Thu 7/812:00LGW - SFO

1 stop19h 47mVirgin Atlantic

Deal found 27/6£478

Thu 10/713:45SFO - LCY

1 stop20h 45mVirgin Atlantic

Tue 12/819:05LCY - SFO

1 stop24h 40mVirgin Atlantic

Deal found 29/6£496

One-way flights from San Francisco to London
Search for one-way flight options from San Francisco to London. Find affordable one-way fares based on user searches. Data last updated 1 July 2025.

Wed 10/916:20SFO - LGW

2 stops20h 20mMultiple Airlines

Deal found 30/6£271

Sat 12/720:30SFO - SEN

1 stop30h 20mMultiple Airlines

Deal found 30/6£271

Fri 12/912:18SFO - STN

3 stops25h 02mMultiple Airlines

Deal found 30/6£271

Thu 10/719:50SFO - LTN

2 stops21h 40mMultiple Airlines

Deal found 30/6£271

Wed 17/911:30SFO - LCY

3 stops22h 50mMultiple Airlines

Deal found 29/6£272

Sun 17/820:10SFO - LHR

1 stop29h 00mIberia

Deal found 28/6£272

Mon 10/1119:25SFO - LGW

1 stop14h 25mSWISS

Deal found 30/6£273

Sun 31/821:19SFO - LHR

2 stops39h 01mMultiple Airlines

Deal found 28/6£273

Tue 8/720:10SFO - LHR

1 stop29h 00mVueling

Deal found 28/6£273

Sun 31/819:40SFO - LHR

2 stops17h 55mScandinavian Airlines

Deal found 28/6£275

Tue 14/1019:30SFO - LCY

1 stop33h 00mSWISS

Deal found 30/6£276

Wed 9/716:20SFO - LGW

1 stop33h 25mTAP AIR PORTUGAL

Deal found 30/6£277

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Francisco to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoLondon

SFO - LCY

SFOLCY

San Francisco

Mon 13/10

19:40-17:15

1 stop13h 35m

London City

Sun 26/10

19:20-17:25

1 stop29h 05m

£429

San FranciscoLondon

SFO - LGW

SFOLGW

San Francisco

Thu 21/8

16:20-23:10

2 stops22h 50m

London Gatwick

Tue 2/9

16:50-14:35

2 stops29h 45m

£429

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 19/8

21:05-19:40

1 stop14h 35m

London Heathrow

Thu 4/9

07:25-19:00

1 stop19h 35m

£429

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 16/7

11:30-10:00

1 stop14h 30m

London Heathrow

Tue 5/8

10:55-23:11

2 stops20h 16m

£429

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 18/8

21:05-20:55

2 stops15h 50m

London Heathrow

Tue 26/8

06:50-19:00

2 stops44h 10m

£432

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Fri 22/8

13:55-06:30

2 stops56h 35m

London Heathrow

Wed 3/9

12:40-20:53

2 stops40h 13m

£432

San FranciscoLondon

SFO - LGW

SFOLGW

San Francisco

Mon 1/12

16:35-09:50

1 stop33h 15m

London Gatwick

Sun 7/12

21:25-14:35

2 stops25h 10m

£433

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 15/7

13:45-10:45

1 stop13h 00m

London Heathrow

Fri 15/8

06:15-12:50

1 stop14h 35m

£433

San FranciscoLondon

SFO - LCY

SFOLCY

San Francisco

Tue 15/7

13:45-19:40

1 stop21h 55m

London City

Wed 17/9

20:10-11:45

1 stop23h 35m

£434

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Thu 11/9

19:20-13:45

Nonstop10h 25m

London Heathrow

Sun 14/9

10:45-13:50

Nonstop11h 05m

£434

Flights are sorted by cheapest return flights first.

Deals found on 30/6

Showing 1-10 of 56 results

...

Best time to book a flight from San Francisco to London

Have a flexible travel schedule? Discover the best time to fly to London from San Francisco with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to London

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

The price you pay for your flight from San Francisco to London may vary depending on when you book. For the best chance of a lower fare, look to book 38 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from San Francisco to London?

Currently, January is the cheapest month in which you can book a flight from San Francisco to London (average of £112). Flying from San Francisco to London in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SFO to LON?

When flying from San Francisco to London, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 30% versus a flight at midday.

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

Travellers seeking maximum savings on their San Francisco to London flight should consider departing on Tuesday evenings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from San Francisco to London

The most flights from SFO to LON are scheduled on a Monday (42 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (37 on average).

Reviews of airlines servicing London

Read through reviews of airlines operating flights from San Francisco to London, such as Delta, Austrian Airlines, andSWISS. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

7,973 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines

7.6

Good

807 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS

7.5

Good

1,653 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,852 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic

7.4

Good

654 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What airport do you fly from for flights from San Francisco to London?
Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to London from San Francisco. Booking flights from San Francisco (SFO) to London should be relatively easy as there are 41 daily outbound flights to London from 8 different airlines.
What are the cheapest airlines flying from San Francisco to London round-trip?
Our cheapest airline available from San Francisco to London is SWISS. Our recent data shows that you can find tickets from as low as £429 on this airline. Additional options worth looking into are Lufthansa and United Airlines, starting at £429 and £429 round-trip. SWISS is currently priced 22% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from San Francisco to London one-way?
For one-way options, check prices for Iberia. According to our data, you can fly for as low as £272. Users have also found prices from £273 and £273 on SWISS and Vueling, respectively.
What are the most popular routes from San Francisco to London?
While some choose either San Francisco - London Gatwick or San Francisco - London City, San Francisco - London Heathrow is the most popular route from San Francisco to London.
What are the most reliable airlines from San Francisco to London?
Before booking your flight to London from San Francisco, check out the most reliable airlines to get you to your destination on time: Aeromexico (83%), Air France (83%), Delta( 83%).
What are the cheapest flights from San Francisco to London?
Looking at all options, your cheapest flight can be booked for £263. While the most popular route (San Francisco - London Heathrow) can be booked for £306 on average our data indicates £1,856 when flying from San Francisco to London.
Can I find deals for flights from San Francisco to London that include hotel bookings?
Yes. In addition to deals on San Francisco to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from San Francisco to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to London.
Can I find deals for business class flights from San Francisco to London?
Yes. Cheapflights offers flight deals from San Francisco to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from San Francisco to London?
Currently, January is the cheapest month in which you can book a flight from San Francisco to London (average of £112). Flying from San Francisco to London in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Browse thousands of different options on Cheapflights for your next trip

Top 8 airlines flying from San Francisco to London

Airline	Cheapest	Average	Flexibility	On-time
TAP AIR PORTUGAL	Cheapest£383	Average£398	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Virgin Atlantic	Cheapest£402	Average£541	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Iberia	Cheapest£418	Average£531	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£421	Average£521	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Air Canada	Cheapest£425	Average£598	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
KLM	Cheapest£433	Average£492	FlexibilityNo cancel fee	On-time75%	Search KLM flights
United Airlines	Cheapest£448	Average£661	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Lufthansa	Cheapest£471	Average£667	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights

Fly with Cheapflights

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

When you search for this flight from San Francisco to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to London from San Francisco.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from San Francisco to London flexibly with Cheapflights today.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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Cheap flights from San Francisco to London from £271

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from San Francisco to London are usually found in October or September, booked 38 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from San Francisco to London

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from San Francisco to London

Cheapest flights from San Francisco to LondonExplore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 July 2025.

Explore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 July 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Francisco to London that are best for you.

Best time to book a flight from San Francisco to London

Have a flexible travel schedule? Discover the best time to fly to London from San Francisco with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to London

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

Use this chart to determine the optimal time to book a return flight from San Francisco to London. Price data was last updated on 27 June 2025.

What is the cheapest month to book a flight from San Francisco to London?

What is the cheapest time of day to fly from SFO to LON?

Find hourly flight availability from San Francisco to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 1 July 2025.

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

Use this chart to determine the cheapest time to fly return from San Francisco to London. Price data was last updated on 16 December 2024.

Weekly flight availability from San Francisco to London

Explore weekly flight availability from San Francisco to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 1 July 2025.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 1 July 2025.

Read through reviews of airlines operating flights from San Francisco to London, such as Delta, Austrian Airlines, andSWISS. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

What are the cheapest airlines to fly from San Francisco to London one-way?

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

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

What are the cheapest flights from San Francisco to London?

Can I find deals for flights from San Francisco to London that include hotel bookings?

How can I find direct flights from San Francisco to London?

Can I find deals for business class flights from San Francisco to London?

What is the cheapest month to book a flight from San Francisco to London?

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Alternative routes for San Francisco to London

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Top 8 airlines flying from San Francisco to London

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Cheapest flights from San Francisco to London
Explore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 July 2025.