Cheap flights from London Heathrow Airport to San Francisco from £405
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
23 Jul — 30 Jul1
Return
1 adult
Economy
Cheapflights Tip: The best prices from London Heathrow to San Francisco are usually found in February or November, booked 82 days in advance, depart on a Tuesday or Thursday and return on a Wednesday
Cheap flight deals from Heathrow to San Francisco
Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 18 July 2025.
Explore the most affordable flight options available from Heathrow to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 July 2025.
Wed 3/914:15LHR - SFO
Nonstop11h 10mBritish Airways
Wed 1/1016:30SFO - LHR
Nonstop10h 25mBritish Airways
Deal found 16/7£405
Sun 24/809:30LHR - SFO
2 stops19h 21mFinnair
Tue 9/908:00SFO - LHR
1 stop18h 50mFinnair
Deal found 16/7£406
Wed 5/1108:55LHR - SFO
2 stops19h 55mAir Canada
Fri 21/1108:25SFO - LHR
2 stops18h 55mAir Canada
Deal found 16/7£407
Thu 23/1010:20LHR - SFO
1 stop14h 10mScandinavian Airlines
Thu 6/1116:40SFO - LHR
2 stops18h 10mScandinavian Airlines
Deal found 17/7£408
Sun 24/816:25LHR - SFO
Nonstop11h 05mVirgin Atlantic
Tue 9/921:20SFO - LHR
Nonstop10h 20mVirgin Atlantic
Deal found 18/7£409
Sun 24/810:35LHR - SFO
Nonstop11h 00mUnited Airlines
Tue 9/916:05SFO - LHR
Nonstop10h 20mUnited Airlines
Deal found 18/7£410
Sun 24/806:30LHR - SFO
1 stop17h 25mMultiple Airlines
Tue 9/919:55SFO - LHR
Nonstop10h 15mMultiple Airlines
Deal found 18/7£414
Sun 24/812:20LHR - SFO
Nonstop11h 00mLufthansa
Tue 9/916:05SFO - LHR
Nonstop10h 20mLufthansa
Deal found 18/7£419
Fri 29/806:30LHR - SFO
1 stop13h 15mDelta
Sun 14/1207:00SFO - LHR
1 stop18h 10mDelta
Deal found 18/7£424
Tue 18/1116:00LHR - SFO
1 stop35h 43mAustrian Airlines
Mon 1/1212:00SFO - LHR
2 stops35h 10mAustrian Airlines
Deal found 16/7£430
Mon 8/913:45LHR - SFO
2 stops35h 00mTAP AIR PORTUGAL
Tue 16/918:45SFO - LHR
2 stops19h 15mTAP AIR PORTUGAL
Deal found 16/7£430
Sat 20/906:50LHR - SFO
2 stops21h 01mBrussels Airlines
Fri 26/908:40SFO - LHR
2 stops28h 15mBrussels Airlines
Deal found 16/7£431
Best flights from Heathrow to San Francisco
Discover carefully curated flight deals from Heathrow to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 July 2025.
Wed 3/914:15LHR - SFO
Nonstop11h 10mBritish Airways
Wed 17/916:30SFO - LHR
Nonstop10h 25mBritish Airways
Deal found 16/7£405
Sun 24/809:30LHR - SFO
2 stops19h 21mFinnair
Tue 9/908:00SFO - LHR
1 stop18h 50mFinnair
Deal found 16/7£406
Wed 5/1108:55LHR - SFO
2 stops19h 55mAir Canada
Fri 21/1108:25SFO - LHR
2 stops18h 55mAir Canada
Deal found 16/7£407
Thu 23/1010:20LHR - SFO
1 stop14h 10mScandinavian Airlines
Thu 6/1116:40SFO - LHR
2 stops18h 10mScandinavian Airlines
Deal found 17/7£408
Sun 24/816:25LHR - SFO
Nonstop11h 05mVirgin Atlantic
Tue 9/921:20SFO - LHR
Nonstop10h 20mVirgin Atlantic
Deal found 18/7£409
Sun 7/914:05LHR - SFO
1 stop29h 06mUnited Airlines
Sun 14/913:05SFO - LHR
Nonstop10h 20mUnited Airlines
Deal found 18/7£412
Sun 24/806:30LHR - SFO
1 stop17h 25mMultiple Airlines
Tue 9/919:55SFO - LHR
Nonstop10h 15mMultiple Airlines
Deal found 18/7£414
Sun 24/816:15LHR - SFO
Nonstop10h 55mLufthansa
Tue 9/916:05SFO - LHR
Nonstop10h 20mLufthansa
Deal found 18/7£419
Sun 24/812:20LHR - SFO
Nonstop11h 00mAustrian Airlines
Tue 9/919:55SFO - LHR
Nonstop10h 15mAustrian Airlines
Deal found 18/7£420
Fri 29/806:30LHR - SFO
1 stop13h 15mDelta
Sun 14/1207:00SFO - LHR
1 stop18h 10mDelta
Deal found 18/7£424
Mon 8/913:45LHR - SFO
2 stops35h 00mTAP AIR PORTUGAL
Tue 16/918:45SFO - LHR
2 stops19h 15mTAP AIR PORTUGAL
Deal found 16/7£430
Sat 20/906:50LHR - SFO
2 stops21h 01mBrussels Airlines
Sat 4/1008:30SFO - LHR
2 stops24h 35mBrussels Airlines
Deal found 16/7£431
Direct flights from Heathrow to San Francisco
Explore direct flight options from Heathrow to San Francisco based on user searches, and compare prices and availability for your desired travel dates. Data last updated 18 July 2025.
Wed 3/914:15LHR - SFO
Nonstop11h 10mBritish Airways
Wed 17/916:30SFO - LHR
Nonstop10h 25mBritish Airways
Deal found 16/7£405
Sun 24/816:25LHR - SFO
Nonstop11h 05mVirgin Atlantic
Tue 9/921:20SFO - LHR
Nonstop10h 20mVirgin Atlantic
Deal found 18/7£409
Sun 24/810:35LHR - SFO
Nonstop11h 00mUnited Airlines
Tue 9/916:05SFO - LHR
Nonstop10h 20mUnited Airlines
Deal found 18/7£410
Mon 1/1210:05LHR - SFO
Nonstop11h 15mMultiple Airlines
Sat 13/1212:50SFO - LHR
Nonstop10h 35mMultiple Airlines
Deal found 17/7£412
Sun 24/816:15LHR - SFO
Nonstop10h 55mLufthansa
Tue 9/916:05SFO - LHR
Nonstop10h 20mLufthansa
Deal found 18/7£419
Sun 7/912:20LHR - SFO
Nonstop11h 05mAustrian Airlines
Fri 19/913:05SFO - LHR
Nonstop10h 20mAustrian Airlines
Deal found 17/7£431
Last-minute flights from Heathrow to San Francisco
Discover last-minute flight deals from Heathrow to San Francisco. Data last updated 18 July 2025 and is based on user searches.
Thu 24/710:45LHR - SFO
Nonstop11h 05mBritish Airways
Wed 22/1019:20SFO - LHR
Nonstop10h 25mBritish Airways
Deal found 18/7£586
Thu 24/711:15LHR - SFO
Nonstop11h 00mVirgin Atlantic
Wed 22/1021:20SFO - LHR
Nonstop10h 20mVirgin Atlantic
Deal found 17/7£614
Thu 24/708:25LHR - SFO
1 stop21h 50mIcelandair
Sun 27/715:15SFO - LHR
1 stop31h 15mIcelandair
Deal found 17/7£637
Fri 25/708:25LHR - SFO
1 stop19h 18mJetBlue
Fri 1/822:30SFO - LHR
1 stop27h 00mJetBlue
Deal found 17/7£580
Sat 26/706:40LHR - SFO
1 stop17h 50mScandinavian Airlines
Thu 4/919:40SFO - LHR
1 stop36h 20mScandinavian Airlines
Deal found 16/7£554
Mon 28/714:10LHR - SFO
1 stop17h 03mUnited Airlines
Tue 12/806:10SFO - LHR
2 stops16h 20mUnited Airlines
Deal found 17/7£643
Sat 23/814:15LHR - SFO
Nonstop11h 10mBritish Airways
Thu 11/916:30SFO - LHR
Nonstop10h 25mBritish Airways
Deal found 17/7£410
Sun 24/809:30LHR - SFO
2 stops19h 21mFinnair
Tue 9/908:00SFO - LHR
1 stop18h 50mFinnair
Deal found 16/7£406
Sun 24/816:25LHR - SFO
Nonstop11h 05mVirgin Atlantic
Tue 9/921:20SFO - LHR
Nonstop10h 20mVirgin Atlantic
Deal found 18/7£409
Sun 24/810:35LHR - SFO
Nonstop11h 00mUnited Airlines
Tue 9/916:05SFO - LHR
Nonstop10h 20mUnited Airlines
Deal found 18/7£410
Sun 24/806:30LHR - SFO
1 stop17h 25mMultiple Airlines
Tue 9/919:55SFO - LHR
Nonstop10h 15mMultiple Airlines
Deal found 18/7£414
Sun 24/808:30LHR - SFO
1 stop36h 10mLufthansa
Tue 9/921:05SFO - LHR
1 stop17h 35mLufthansa
Deal found 16/7£416
One-way flights from Heathrow to San Francisco
Search for one-way flight options from Heathrow to San Francisco. Find affordable one-way fares based on user searches. Data last updated 18 July 2025.
Fri 12/1209:50LHR - SFO
1 stop13h 45mAer Lingus
Deal found 16/7£420
Mon 25/822:15LHR - SFO
3 stops45h 47mMultiple Airlines
Deal found 16/7£422
Mon 1/906:00LHR - SFO
2 stops42h 45mTAP AIR PORTUGAL
Deal found 18/7£422
Mon 25/810:45LHR - SFO
Nonstop11h 05mBritish Airways
Deal found 16/7£430
Tue 2/912:20LHR - SFO
Nonstop11h 05mLufthansa
Deal found 17/7£434
Thu 18/910:35LHR - SFO
Nonstop11h 05mBrussels Airlines
Deal found 18/7£442
Mon 18/812:20LHR - SFO
Nonstop11h 00mAustrian Airlines
Deal found 17/7£443
Mon 11/808:25LHR - SFO
1 stop24h 33mJetBlue
Deal found 18/7£457
Mon 18/820:50LHR - SFO
1 stop29h 20mIberia
Deal found 18/7£459
Cheapflights Fare Finder
Customise your flight search to find flights from Heathrow to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 18 July 2025.
Use the filters below to find and compare flights from London Heathrow Airport to San Francisco that are best for you.
Fly from
Heathrow
Fly to
San Francisco
Route
Depart
Return
Price
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Wed 3/9
14:15-17:25
Nonstop11h 10m
San Francisco
Wed 17/9
16:30-10:55
Nonstop10h 25m
£405
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Sun 24/8
09:30-20:51
2 stops19h 21m
San Francisco
Tue 9/9
08:00-10:50
1 stop18h 50m
£406
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Wed 5/11
08:55-20:50
2 stops19h 55m
San Francisco
Fri 21/11
08:25-11:20
2 stops18h 55m
£407
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Thu 23/10
10:20-16:30
1 stop14h 10m
San Francisco
Thu 6/11
16:40-18:50
2 stops18h 10m
£408
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Sun 24/8
16:25-19:30
Nonstop11h 05m
San Francisco
Tue 9/9
21:20-15:40
Nonstop10h 20m
£409
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Sun 24/8
10:35-13:35
Nonstop11h 00m
San Francisco
Tue 9/9
16:05-10:25
Nonstop10h 20m
£410
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Sun 7/9
20:05-16:10
1 stop28h 05m
San Francisco
Sun 14/9
19:30-21:45
1 stop18h 15m
£412
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Sun 24/8
06:30-15:55
1 stop17h 25m
San Francisco
Tue 9/9
19:55-14:10
Nonstop10h 15m
£414
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Sun 24/8
16:15-19:10
Nonstop10h 55m
San Francisco
Tue 9/9
16:05-10:25
Nonstop10h 20m
£419
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Sun 24/8
12:20-15:20
Nonstop11h 00m
San Francisco
Tue 9/9
19:55-14:10
Nonstop10h 15m
£420
Flights are sorted by cheapest return flights first.
Deals found on 16/7
Showing 1-10 of 22 results
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Best time to book a flight from Heathrow to San Francisco
Have a flexible travel schedule? Discover the best time to fly to San Francisco from Heathrow 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 London Heathrow Airport to San Francisco
How far ahead should I book a flight from London Heathrow Airport to San Francisco?
Use this chart to determine the optimal time to book a return flight from Heathrow to San Francisco. Price data was last updated on 11 July 2025.
The price you pay for your flight from London Heathrow Airport to San Francisco may vary depending on when you book. For the best chance of a lower fare, look to book 82 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 London Heathrow Airport to San Francisco?
Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of £538). Flying from London Heathrow Airport to San Francisco in July is currently the most expensive (average of £803). 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 LHR to SFO?
Find hourly flight availability from Heathrow to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 July 2025.
It’s typically best to fly out from London Heathrow Airport to San Francisco in the evening. Doing so could potentially save you 49% on the flight price compared to flying at midday, which is usually more expensive.
What is the cheapest day to fly from London Heathrow Airport to San Francisco?
Use this chart to determine the cheapest time to fly return from Heathrow to San Francisco. Price data was last updated on 13 July 2025.
Travellers seeking maximum savings on their London Heathrow Airport to San Francisco flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday at midday flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from London Heathrow Airport to San Francisco
Explore weekly flight availability from Heathrow to San Francisco. 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 18 July 2025.
The most flights from LHR to SFO are scheduled on a Monday (43 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (37 on average).
How much does it cost for a return flight from London Heathrow Airport to San Francisco?
Reviews of airlines servicing San Francisco
Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated 18 July 2025.
See what other customers who have flown with Delta, Austrian Airlines, andFinnair from London Heathrow Airport to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Related info for your journey
Find useful and relevant information for your journey from Heathrow to San Francisco. 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 into for flights to San Francisco from London Heathrow?
Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to San Francisco from London Heathrow. Booking flights from London Heathrow to San Francisco (SFO) should be relatively easy as there are 42 daily inbound flights from London Heathrow from 17 different airlines.
What are the cheapest airlines flying from London Heathrow Airport to San Francisco round-trip?
Cheapflights users have booked flights from London Heathrow Airport to San Francisco round-trip from £405. Other airlines that can offer you cheap pricing are Finnair, from £406, and Air Canada, from £407. British Airways is priced at 20% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from London Heathrow Airport to San Francisco one-way?
To fly one-way, consider booking your trip with Aer Lingus, which is currently one of the cheapest options available, starting at £420. TAP AIR PORTUGAL flights start at £422 while deals on British Airways start at £430 one-way.
What are the most reliable airlines from London Heathrow Airport to San Francisco?
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 London Heathrow Airport to San Francisco on time: Air New Zealand (87%), Air Canada (86%), Austrian Airlines (86%).
What are the cheapest flights from London Heathrow Airport to San Francisco?
The cheapest flight price from London Heathrow Airport to San Francisco is £401. On average you can expect to pay £1,945. The most popular route, (London Heathrow - San Francisco), can usually be booked for £351.
Where are the most common stopover locations when flying from London Heathrow Airport to San Francisco?
Flights departing from London Heathrow Airport and landing in San Francisco stopover in Copenhagen most frequently. Lisbon is the second most popular location for stopovers on flights from London Heathrow Airport to San Francisco.
What are some popular things to do or see while on a stopover in Copenhagen?
The majority of Copenhagen visitors spend their time at Tivoli, Opera House, and Højbro Plads. Tivoli, Opera House, and Højbro Plads can be visited by traveling about 5.3 mi, 4.9 mi, and 5.1 mi respectively from Kastrup Copenhagen. Those on a stopover in Copenhagen in need of a car hire can book one at Kastrup Copenhagen for about £46.
What are some popular points of interest to see during a stopover in Lisbon?
Most Lisbon visitors opt to spend their time at Chiado, Sé de Lisboa, and Londres. Chiado, Sé de Lisboa, and Londres are located about 4.5 mi, 4.6 mi, and 2.3 mi, respectively from Lisbon Humberto Delgado. Those on a stopover in Lisbon in need of a car hire can book one at Lisbon Humberto Delgado for about £21.
Where are the least popular stopover locations for London Heathrow Airport to San Francisco flights?
London Heathrow Airport to San Francisco flights have a stopover in Dublin least often.
Can I find deals for flights from Heathrow to San Francisco that include hotel bookings?
Yes. In addition to deals on Heathrow to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to San Francisco.
Can I find deals for business class flights from Heathrow to San Francisco?
Yes. Cheapflights offers flight deals from Heathrow to San Francisco 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 London Heathrow Airport to San Francisco?
Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of £538). Flying from London Heathrow Airport to San Francisco in July is currently the most expensive (average of £803). 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.
Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Vallejo
Newark
South San Francisco
Bodega Bay
Pacific Grove
Union City
Browse thousands of different options on Cheapflights for your next trip
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Fly from Heathrow to San Francisco on these airlines
Choose from the following airlines for your flight from Heathrow to San Francisco. Flights are based on user searches made on Cheapflights and were last updated on 18 July 2025.
Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 18 July 2025.
Top 10 airlines flying from Heathrow to San Francisco
Discover the top 10 airlines that operate flights from Heathrow to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 18 July 2025.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Heathrow to San Francisco?
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 San Francisco from Heathrow today with Cheapflights!
Why should you use Cheapflights to find cheap flight tickets from Heathrow to San Francisco?
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 San Francisco from Heathrow.
Can Cheapflights find flights from Heathrow to San Francisco with no change fees?
Yes! Cheapflights helps users easily find flights from Heathrow to San Francisco with no change fees.
Can Cheapflights notify me if prices for flights from Heathrow to San Francisco become cheaper?
Of course! You can now track prices for flights from Heathrow to San Francisco and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.
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