$241 Find Cheap Flights from San Francisco to the United Kingdom

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to the United Kingdom departing on 8/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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Best United Kingdom Flight Deals from San Francisco

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
London
London1 stop$422
Edinburgh
Edinburgh1 stop$565
Manchester
Manchester1 stop$583
Birmingham
Birmingham1 stop$614
Belfast
Belfast1 stop$630
Inverness
Inverness2 stops$580
Bristol
Bristol1 stop$660
Aberdeen
Aberdeen2 stops$626
Liverpool
Liverpool1 stop$705
Leeds
Leeds3 stops$650
Cardiff
Cardiff2 stops$832
Newquay
Newquay1 stop$952
Exeter
Exeter1 stop$909
Kirkwall
Kirkwall3 stops$1,661
Grimsby
Grimsby1 stop$793
London
London1 stop$422
Edinburgh
Edinburgh1 stop$565
Manchester
Manchester1 stop$583
Birmingham
Birmingham1 stop$614
Belfast
Belfast1 stop$630
Inverness
Inverness2 stops$580
Bristol
Bristol1 stop$660
Aberdeen
Aberdeen2 stops$626
Liverpool
Liverpool1 stop$705
Leeds
Leeds3 stops$650
Cardiff
Cardiff2 stops$832
Newquay
Newquay1 stop$952
Exeter
Exeter1 stop$909
Kirkwall
Kirkwall3 stops$1,661
Grimsby
Grimsby1 stop$793

Cheap Flights from San Francisco to the United Kingdom

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to the United Kingdom that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Francisco to the United Kingdom

Mon, Sep 22 - Mon, Oct 13
TAP AIR PORTUGAL Logo
4:20 pm - 3:35 pmSFO-LGW
15h 15m1 stop
TAP AIR PORTUGAL Logo
4:25 pm - 1:35 pmLGW-SFO
29h 10m1 stop
$422TAP AIR PORTUGAL
Find Deal
Mon, Sep 22 - Mon, Oct 6
TAP AIR PORTUGAL Logo
4:20 pm - 3:35 pmSFO-LGW
15h 15m1 stop
TAP AIR PORTUGAL Logo
4:25 pm - 1:35 pmLGW-SFO
29h 10m1 stop
$424TAP AIR PORTUGAL
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Tue, Aug 26 - Tue, Sep 2
Iberia Logo
1:20 pm - 10:30 amSFO-LHR
13h 10m1 stop
Iberia Logo
12:00 pm - 8:32 pmLHR-SFO
16h 32m1 stop
$465Iberia
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Sun, Aug 3 - Tue, Aug 19
Virgin Atlantic Logo
6:50 pm - 5:15 pmSFO-LHR
14h 25m1 stop
Virgin Atlantic Logo
9:20 am - 6:52 pmLHR-SFO
17h 32m1 stop
$475Virgin Atlantic
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Wed, Oct 8 - Wed, Oct 22
British Airways Logo
6:51 am - 8:10 amSFO-LGW
17h 19m1 stop
British Airways Logo
3:05 pm - 11:28 pmLGW-SFO
16h 23m1 stop
$483British Airways
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Tue, Sep 2 - Tue, Sep 9
British Airways Logo
6:05 am - 8:10 amSFO-LGW
18h 05m1 stop
British Airways Logo
3:05 pm - 11:59 pmLGW-SFO
16h 54m1 stop
$485British Airways
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Tue, Aug 5 - Thu, Aug 28
Virgin Atlantic Logo
7:05 am - 10:00 amSFO-LGW
18h 55m1 stop
Virgin Atlantic Logo
12:00 pm - 1:35 amLGW-SFO
21h 35m1 stop
$490Virgin Atlantic
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Sun, Aug 3 - Tue, Aug 19
United Airlines Logo
11:40 am - 10:00 amSFO-LHR
14h 20m1 stop
United Airlines Logo
4:40 pm - 12:59 amLHR-SFO
16h 19m1 stop
$492United Airlines
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Sun, Aug 3 - Tue, Aug 19
United Airlines Logo
7:50 pm - 2:10 pmSFO-LHR
10h 20mnonstop
United Airlines Logo
12:20 pm - 3:20 pmLHR-SFO
11h 00mnonstop
$493United Airlines
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Wed, Aug 27 - Mon, Sep 15
Iberia Logo
2:19 pm - 2:25 pmSFO-LHR
16h 06m1 stop
Iberia Logo
8:50 pm - 6:10 pmLHR-SFO
29h 20m1 stop
$508Iberia
Find Deal
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KAYAK's insights & trends for San Francisco to the United Kingdom flights

Get data-powered insights and trends into flights from San Francisco to the United Kingdom to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest San Francisco to the United Kingdom flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from San Francisco to the United Kingdom.

The cheapest ticket to the United Kingdom from San Francisco found in the last 72 hours was to London, at $501 round-trip. The most popular route is from San Francisco (SFO) to London Heathrow Airport (LHR), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $501.

Can I save money by flying with a layover from San Francisco to the United Kingdom?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 3 stops layover the cheapest option at $2,226 on average.

What is the cheapest month to fly from San Francisco to the United Kingdom?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to the United Kingdom, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Francisco to the United Kingdom is October, when tickets cost $641 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $1,032 and $903 respectively.

What’s the cheapest day of the week to fly from San Francisco to United Kingdom?

The average price of all round-trip flights from San Francisco to the United Kingdom clicked on KAYAK for each day over the last 12 months.

For San Francisco to United Kingdom, Wednesday is the cheapest day to fly on average and Saturday is the most expensive. Flying from United Kingdom back to San Francisco, the best deals are generally found on Thursday, with Sunday being the most expensive.

How far in advance should I book a flight from San Francisco to the United Kingdom?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Francisco to the United Kingdom, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from San Francisco to the United Kingdom, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.


Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$241
Best time to beat the crowds with an average 0% drop in price.
Most popular time to fly with an average 15% increase in price.
Flight from San Francisco to London Gatwick Airport

Flights from San Francisco to the United Kingdom: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from San Francisco to the United Kingdom 
GeraldFlew with Virgin AtlanticSFO-LHRJun 2025
Virgin Atlantic uses terminal 3. Much faster clearing customs than terminal 5
Verified travelerFlew with American AirlinesSFO-LHRJun 2025
Large number of passengers on the flight so arrive early to the airport and to the boarding gate
PallaviFlew with British AirwaysSFO-LHRApr 2025
Eat at the lounge first so you are not stuck eating overcooked cheese ravioli
TapanFlew with British AirwaysSFO-LHROct 2024
Great baggage policy in BA.. The worst part was experience at London Heathrow airport. Security was slow, too many people. Almost lost connecting flight even with 2 hours layover.

FAQs - booking United Kingdom flights

  • How does KAYAK find such low prices on flights from San Francisco to the United Kingdom?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Francisco to the United Kingdom.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Francisco to the United Kingdom?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from San Francisco to the United Kingdom is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Francisco to the United Kingdom?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from San Francisco to the United Kingdom with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Francisco to the United Kingdom?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from San Francisco to the United Kingdom up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to the United Kingdom?

    The cheapest time of day to fly to the United Kingdom is generally at night, when round-trip flights cost $853 on average. Morning departures are around 1% more expensive than evening flights, on average. The most expensive time of day to fly to the United Kingdom is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $988.

Top tips for finding cheap flights to the United Kingdom

  • Looking for a cheap flight? 25% of our users found tickets from San Francisco to the following destinations at these prices or less: London $424 one-way - $615 round-trip

Reviews of the top 5 airlines serving from San Francisco to the United Kingdom

 
Need help choosing which airline to fly with from San Francisco to the United Kingdom? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 7956 reviews
7.9Entertainment
8.5Crew
8.2Boarding
7.9Comfort
7.3Food
Airline reviews

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

4.0 OkayMrs., Jul 2025LAX - RDU
Read more Delta reviews

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full flight.

Delta flight was on time, seats were comfortable, and crew was nice.

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.

Breakfast was not loaded at SFO due to catering company change. Seems like a major airline at a major hub would have thought of something else or warned passengers to pick up food before boarding a 3 hour flight.

Boarding seemed to be organized bedlam. For what ever reason, preboarding took longer than 20 minutes. Made the plane 20 minutes late taking off. Luckily we arrived on time. Flight crew seemed very friendly. Only slight turbulence.

They hired a new catering company the same day of my flight. They botched the job by not delivering the right carts and after THREE HOURS waiting, the flight crew timed out (flight was 19 hours long and FAA rules state crew can’t work more than 14 hours long). So they CANCELED OUR FLIGHT!! Worst experience ever. Avoid UAL at all costs.

The personnel were professional and friendly. The Boeing 737 Max 9 is too claustrophobic and was very warm at both airport gates, and still warm in the air.

While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.

get E+, a must for 5 hours flight if you are tall

Great crew - old style upper class seats on the older fleet now feels dated

Premium economy more comfortable than economy, but not by much. Did was awful, do not try the omelette. Flight crew were helpful. Flight was delayed by over an hour. Overall but bad, arrived safely and thank God.

Food was excellent. Service was very good. Staff was very helpful to all passengers.

The crew was excellent as ever on Virgin. The special meal was poor unfortunately. More significantly when we arrived at Manchester Airport there was no air bridge provided and we had to exit the plane down a rickety stair case. This is unacceptable for a transatlantic flight. Whilst I understand that this is the airport’s fault at the end of the day the airline is responsible for our transportation and needs to do something.

Super friendly and helpful staff, from check-in desk to cabin crew.

Following a paid seat upgrade for enhanced comfort, I encountered an unacceptable odor in my assigned area. It took three hours for the crew to relocate me, and the replacement seat was unacceptably close to the lavatory, offering no improvement.

Good overall. Cannot fault the airlines. I have had better entertainment systems before ie ice in Emirates but it was not too bad. Food was decent and staff were friendly.

I did not fly by vergin atlantic from bangalore to vasco da gama

Your flight delayed at Heathrow n I almost missed my mother funeral.you idiots. I had to waste 10 hours in different airports. Thank your stars I'm not suing you.

Miami airport needs more thorough signage. It was a long walk from my transport point to the check in desk,

Boarding was 2 1/2 late no explanation Captain said he did not know why, but he rested at home for an extra couple of hours. Food was edible, Nothing more.

I liked the comfort of the plane. It was unexpected from past experiences.

BEWARE!!! Iberia changes your seats at random. I paid for a window seat and they changed it to one in the middle aisle resting against the bathroom- can’t lean back + hear every flush. This on a 11 hour flight.. There were families that were broken up with separate seats all over the plane. Lots of upset passengers showing their seat confirmation to the besieged and helpless airline steward. Also, the gluten free meal was tasteless.

Chair is very high. Your feet cannot touch the ground for 8 hours flight. It was a nightmare. Food was bad.

ground crew and check-in was pathetic - insisted on charging me for luggage even though the ticket said it was already included. They also accidentally sent my luggage through without a luggage tag and had to retrieve it. Generally, it was like a bad movie.

Moved the flight an hour later, were not reliable about confirmation, website didn't work, no gate information, boarding was a mad house. Flight itself was fine and short. Organization needs work.

The app on phone and the online check in is not good, it would not give me the option of Spain or Madrid City in the drop down menu and I couldn't move forward with online check in.

Flight was delayed 3 hours and 15 minutes. The delay caused me to miss my tour group due to arriving late.

As always a terrible experience. AA stole a day from my vacation days planned to be spent with my Family. Response: delays related to weather issues.

It was a wonderful experience with great food, great staff, and no difficulties boarding!

They’ve lost my bag and I have no way of really getting in touch with anyone and have received no updates.

Very crowded, no real explanation of food "chicken or pasta?" After dinner no drinks service. Plane was clean, but little help with finding soaces fir luggage to get into overhead bins. Many passengers putting 2 bags, hats, duty free in overhead bins so no space for roll ons

Flight was good but seat in 12D was not comfortable, better on the Airbus 321 from Tampa to Charlotte. No breakfast was served before landing in zLonfon only a coffee and orange juice.

I was transferred to an American Airlines flight. The boarding was late and unorganized. The seating was extremely tight and uncomfortable. Will not use AA again.

The entertainment selection was ok, but overall not bad! The crew was great.

Good crew and boarding process. Horrible food and one of the most uncomfortable aircraft seats I have ever sat in. The cabin temperature was warm which made it hard for my family to sleep.

The check-in of my luggage was terrible. When purchased my tickets, one luggage and one carry-on was part of the fight. My flight was switched from British to American Airline. During check-in of luggage at the airport, I was denied and had to pay extra $75. How do I get reimbursed for this extra luggage payment?

More Indian vegetarian food options would have been better Availability of seat selection free of charge 72 hours before departure would be great

This was the second time on BA, food terrible, bathrooms gross,( granted, that was mostly due to the disgusting children urinating all over it)boarding was late and disorganized. No gate issued until last minute st Heathrow, bad system, caused undue stress. Seats were painful, that's what you get for traveling like a poor in economy, right BA? Should have been able to afford business or first class if you want to actually be able to walk upright without back pain after a trip.

The delay was not communicated via text and the person who helped with check in also didn’t inform me about the delay. I ended up missing my connection and it was a waste of 5 hours. The crew didn’t mention there would be someone at the gate informing of if I would be rebooked and there was no signage. Overall a very poor experience. The British Airways app was also very buggy, and didn’t work. I will avoid flying with British Airways when possible.

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