$384 Cheap United flights San Francisco (SFO) to London (LHR)

View $384 flight on Tue, Feb 10, 2026Opens in a new window

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$384 Cheap United flights San Francisco (SFO) to London (LHR)

Prices were available within the past 7 days and start at $384 for one-way flights and $501 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Nov 25 - Thu, Dec 4
SFO
San Francisco
LHR
London
$501 Roundtrip, found 15 hours ago
$501
Roundtrip
found 15 hours ago
Select United flight, departing Tue, Nov 25 from San Francisco to London, returning Thu, Dec 4, priced at $501 found 15 hours ago
United
Tue, Feb 10 - Tue, Mar 3
SFO
San Francisco
LHR
London
$501 Roundtrip, just found
$501
Roundtrip
just found
Select United flight, departing Tue, Feb 10 from San Francisco to London, returning Tue, Mar 3, priced at $501 just found
United
Tue, Nov 25 - Thu, Dec 4
SFO
San Francisco
LHR
London
$505 Roundtrip, found 15 hours ago
$505
Roundtrip
found 15 hours ago
Select United flight, departing Tue, Nov 25 from San Francisco to London, returning Thu, Dec 4, priced at $505 found 15 hours ago
United
Tue, Nov 25 - Thu, Dec 4
SFO
San Francisco
LHR
London
$507 Roundtrip, found 15 hours ago
$507
Roundtrip
found 15 hours ago
Select United flight, departing Tue, Nov 25 from San Francisco to London, returning Thu, Dec 4, priced at $507 found 15 hours ago
United
Tue, Feb 10 - Tue, Mar 3
SFO
San Francisco
LHR
London
$508 Roundtrip, just found
$508
Roundtrip
just found
Select United flight, departing Tue, Feb 10 from San Francisco to London, returning Tue, Mar 3, priced at $508 just found
United
Sun, Sep 21 - Mon, Sep 29
SFO
San Francisco
LHR
London
$510 Roundtrip, found 14 hours ago
$510
Roundtrip
found 14 hours ago
Select United flight, departing Sun, Sep 21 from San Francisco to London, returning Mon, Sep 29, priced at $510 found 14 hours ago
United
Fri, Aug 29 - Sun, Sep 7
SFO
San Francisco
LHR
London
$742 Roundtrip, just found
$742
Roundtrip
just found
Select United flight, departing Fri, Aug 29 from San Francisco to London, returning Sun, Sep 7, priced at $742 just found
Flights from San Francisco (SFO) to London (LHR)
Origin airport
San Francisco Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, JetBlue Airways, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Popular airline
British Airways
Distance
5354 mi
Average flight time
18 hours 22 mins

Frequently asked questions

How much is a United Airlines flight from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR)?
Apply the "Price (lowest to highest)" filter on Expedia to look for cheap United Airlines round-trip flights from $501 from SFO to LHR. Affordable one-way fares from $384 are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from SFO to LHR with United Airlines?
January is one of the cheapest months to jet away to London with United Airlines. You could also find great deals on one-way and return tickets in February.
What is the cheapest time to book flights from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR) with United Airlines?
Scoring the best United Airlines deals from SFO to LHR is typically all about timing. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. Better still, you can pocket 17% on average by buying your fare on a Sunday compared to a Friday, which is often the most expensive day to book.* It's a good idea to start checking out flights about one month before you want to travel.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR)?
Skip the layovers and fly from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR) on any of United Airlines's 14 direct weekly flights. Use Expedia's "Nonstop" and "Airline" filters to find the United Airlines flight that'll arrive at LHR at a time that suits you.
How long does it take to fly from SFO to LHR with United Airlines?
On average, it takes 10h 35m to travel nonstop from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR) with United Airlines.
Which day of the week has the most United Airlines flights from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR)?
Friday has the most United Airlines flights from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR). With 2 daily departures, this is a great day to find something that will suit your plans.
What is the earliest United Airlines flight from SFO to LHR?
The earliest flight from SFO to LHR with United Airlines leaves at 12:50PM UTC-8. You'll touch down at 7:25AM UTC+0. The final United Airlines flight of the day takes off at 5:25PM UTC-8 and arrives at 12:00PM UTC+0. With 20% fewer cancellations for early and mid-morning flights, beginning your travel day early is typically the smartest choice.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in London?
United Airlines flights from San Francisco Intl. Airport (SFO) to London arrive at Heathrow Airport (LHR). This is the main entry point here.
Why fly with United Airlines from SFO to LHR?
Depart from SFO to LHR with United Airlines and you can look forward to a range of benefits starting with a rewarding loyalty program. When booking through Expedia as a United Mileage Plus and One Key™ member, you could also earn OneKeyCash™* to use on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR)?
United Airlines generally operates Boeing 777 planes for flights from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR). Keep in mind that aircraft type can change depending on operational requirements, so the plane you board might be different on your travel date.
Can I change or cancel my United Airlines flight from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR)?
Changes are generally free within 24 hours of booking, but your airline may charge you after that. For more details about altering your reservation, go to your "Trips," select your flight and click on "Manage Booking." If you want the flexibility to change your plans without additional charges, check the "No cancel fee" or "Changes included" filter when planning your trip.

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