$3,293 Cheap United flights from London to San Francisco (LHR to SFO)

Find The Best Day To Fly from London to San Francisco

Amazing United LHR to SFO Flight Deals

The cheapest flights to San Francisco Intl. found within the past 7 days were $643 round trip and $3,293 one way. Prices and availability subject to change. Additional terms may apply.

Sat, Sep 13 - Thu, Sep 18
LHR
London
SFO
San Francisco
$643 Roundtrip, found 5 days ago
$643
Roundtrip
found 5 days ago
Select United flight, departing Sat, Sep 13 from London to San Francisco, returning Thu, Sep 18, priced at $643 found 5 days ago

Frequently asked questions

Can I catch a flight from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO) right now?
It's prudent to find out about any quarantine requirements and travel advice reports in place in your destination city. Ensure you check out the Covid-19 Travel Advisor for up-to-date info on booking a flight to San Francisco Airport from London Heathrow.
What terminal is United Airlines at London Heathrow?
At Heathrow Airport (LHR), United Airlines flights to San Francisco Intl. Airport (SFO) typically leave from terminal 2. Like to know exactly which terminal you'll be disembarking at? It's most likely to be terminal I.
Are there United Airlines non-stop flights from LHR to SFO?
You bet there are. Save time and effort and jet straight from London Heathrow to San Francisco Intl. Airport (SFO) with United Airlines. Avoid long stopovers, reduce the risk of losing your bags and start your vacation faster --- direct flights are the preferred way to travel for many wise wanderers.
How long is a United Airlines flight from LHR to SFO?
Life is one big journey --- and so is your trip from London Heathrow to SFO with United Airlines. Taking an average of 13 hours and 10 minutes, be sure to bring essentials like a neck pillow, a pullover and your toothbrush.
What type of aircraft does United Airlines fly from LHR to SFO?
When you jet between LHR and SFO with United Airlines, you'll probably be doing it aboard the Boeing 787-9. The carrier also operates the Boeing 777 on this flight path.
How many direct and indirect flights does United Airlines fly from LHR to SFO?
You'll have a great deal of options if you're thinking about flying with United Airlines from LHR to SFO. Currently, it offers about 4 flights daily.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to SFO, please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Discover our best United flight from London LHR to San Francisco SFO 

To find the best deals on flights to London from San Francisco with United, just enter your travel dates, filter by United, and hit search. You’ll find 3 flights to choose from and can sort by price, flight duration, and arrival or departure time.  

 

Return flights from London LHR to San Francisco SFO with United 

If you’re planning a round trip, booking return flights with United is usually the most cost-effective option. With airfares ranging from $643 to $3,293, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way United flights from London LHR to San Francisco SFO 

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way United flight from London to San Francisco costs from $3,293. Prices and availability subject to change. Additional terms may apply. 

 

The easy way to find cheap flights to San Francisco SFO from  London LHR with United 

To find a cheap United flight from London LHR to San Francisco SFO, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference. 

 

How to find our best airfare deals on United flights from London LHR to San Francisco SFO 

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as September, or if you book a flight with a stopover. 

 

Find nonstop flights from London LHR to San Francisco SFO with United 

If you’re keen to be on San Francisco soil fast, don’t waste time with a stopover—filter your search results to show direct United flights only. The journey takes around 10 hour(s) 55 min(s) – so you’ll be there before you know it. 

 

Flexible airline tickets for United flights from London LHR to San Francisco SFO 

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.  

 

There are a lot of reasons to book your flights to San Francisco SFO from  London LHR with United on Travelocity 

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.

United Airports
Hop on a(n) United flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ORDUSAO'Hare Intl.227
DENUSADenver Intl.226
IAHUSAGeorge Bush Intercontinental136
IADUSAWashington Dulles Intl.100
SFOUSASan Francisco Intl.64
LAXUSALos Angeles Intl.23
EWRUSALiberty Intl.20
FRADEUFrankfurt Intl.19
NRTJPNNarita Intl.19
PEKCHNCapital Intl.16

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Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.
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