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Cheap flights from London to Fremont from £351

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 7/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SFO
23 Mar — 30 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Fremont are usually found in February or September, booked 62 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from London to Fremont

Enter your travel dates to find the best prices.

Cheapest flights from London to Fremont
Explore the most affordable flight options available from London to Fremont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2026.

Tue 21/410:50
LHR
-
SFO
1 stop16h 10m
United Airlines
Fri 1/512:50
SFO
-
LHR
Nonstop10h 35m
United Airlines
Deal found 20/2£370
Fri 4/909:25
LGW
-
SFO
1 stop14h 50m
SWISS
Mon 14/919:35
SFO
-
LGW
1 stop14h 15m
SWISS
Deal found 19/2£370
Mon 23/311:10
LHR
-
SFO
1 stop16h 25m
United Airlines
Wed 15/419:30
SFO
-
LHR
Nonstop10h 40m
United Airlines
Deal found 20/2£370
Tue 1/909:25
LGW
-
SFO
1 stop15h 10m
SWISS
Tue 8/919:35
SFO
-
LGW
1 stop14h 15m
SWISS
Deal found 18/2£370
Sat 18/407:25
LHR
-
SFO
1 stop15h 05m
United Airlines
Sat 25/419:30
SFO
-
LHR
Nonstop10h 40m
United Airlines
Deal found 19/2£371
Tue 24/218:40
LGW
-
SFO
1 stop29h 50m
SWISS
Tue 3/319:25
SFO
-
LGW
1 stop14h 25m
SWISS
Deal found 16/2£371
Fri 1/507:25
LHR
-
SFO
1 stop19h 35m
United Airlines
Sun 17/523:56
SFO
-
LHR
1 stop22h 49m
United Airlines
Deal found 18/2£372
Fri 1/509:25
LGW
-
SFO
1 stop14h 50m
SWISS
Wed 6/519:35
SFO
-
LGW
1 stop14h 15m
SWISS
Deal found 20/2£372
Thu 16/413:30
LHR
-
SFO
1 stop14h 30m
Multiple Airlines
Sun 19/412:50
SFO
-
LHR
Nonstop10h 35m
Multiple Airlines
Deal found 18/2£373
Sun 15/307:50
LHR
-
SFO
1 stop16h 45m
British Airways
Mon 30/316:59
SFO
-
LHR
1 stop14h 06m
British Airways
Deal found 18/2£373
Thu 7/518:35
LGW
-
SFO
1 stop29h 40m
SWISS
Sun 10/519:35
SFO
-
LGW
1 stop14h 15m
SWISS
Deal found 18/2£373
Mon 23/307:40
LHR
-
SFO
1 stop19h 55m
United Airlines
Wed 1/416:35
SFO
-
LHR
Nonstop10h 35m
United Airlines
Deal found 17/2£374

Find flight deals from London to Fremont

Keep the following information in mind while searching for London to Fremont flight deals. Data was last updated 21 February 2026.

Round-trip from

£370

One-way from

£351

Popular in

July

Cheapest in

February

Average price

£419
United Airlines
  • United Airlines
  • 21/4-1/5
  • 2 total stops
  • 39h 30m total
  • London to Fremont
Search Deals
7/3
  • 7/3
  • 3 total stops
  • 48h 45m total
  • London to Fremont
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£50 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Fremont 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 21 February 2026.
Use the filters below to find and compare flights from London to Fremont that are best for you.

Fly from

London

Fly to

Fremont

Route

Depart

Return

Price

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 29/4

08:40-16:15

1 stop15h 35m

San Francisco

Wed 6/5

16:35-11:10

Nonstop10h 35m

£370

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 23/3

07:40-20:35

1 stop19h 55m

San Francisco

Tue 7/4

16:35-11:10

Nonstop10h 35m

£374

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 30/4

08:45-16:15

1 stop15h 30m

San Francisco

Tue 2/6

12:15-10:10

1 stop13h 55m

£376

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 20/5

08:40-16:15

1 stop15h 35m

San Francisco

Wed 27/5

05:05-08:30

1 stop19h 25m

£381

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 19/5

12:10-16:15

1 stop36h 05m

San Francisco

Tue 30/6

05:00-09:40

1 stop20h 40m

£382

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 18/3

10:05-14:20

Nonstop11h 15m

San Francisco

Tue 24/3

18:25-12:00

Nonstop10h 35m

£384

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 16/3

10:05-14:20

Nonstop11h 15m

San Francisco

Sun 29/3

12:50-07:25

Nonstop10h 35m

£385

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 7/3

06:00-16:30

1 stop18h 30m

San Francisco

Mon 23/3

20:25-21:25

2 stops18h 00m

£385

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 17/3

13:45-18:00

Nonstop11h 15m

San Francisco

Tue 31/3

16:35-11:10

Nonstop10h 35m

£385

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 19/3

10:05-14:20

Nonstop11h 15m

San Francisco

Sun 29/3

12:50-07:25

Nonstop10h 35m

£385

Flights are sorted by cheapest return flights first.

Deals found on 17/2

Showing 1-10 of 60 results
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Best time to book a flight from London to Fremont

Have a flexible travel schedule? Discover the best time to fly to Fremont from London 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 to Fremont

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

Use this chart to determine the optimal time to book a return flight from London to Fremont. Price data was last updated on 20 February 2026.

The price you pay for your flight from London to Fremont may vary depending on when you book. For the best chance of a lower fare, look to book 62 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 to Fremont?

Currently, February is the cheapest month in which you can book a flight from London to Fremont (average of £345). Flying from London to Fremont in July is currently the most expensive (average of £441). 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 LON to FR8?

Find hourly flight availability from London to Fremont. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 February 2026.

When flying from London to Fremont, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from London to Fremont

Explore weekly flight availability from London to Fremont. 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 21 February 2026.

The most flights from LON to FR8 are scheduled on a Monday (31 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (31 on average).

How much does it cost for a return flight from London to Fremont?

Reviews of airlines servicing Fremont

Get insights into the airlines that provide service to Fremont. 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 Fremont. Reviews last updated 21 February 2026.
See what other customers who have flown with Austrian Airlines, Virgin Atlantic, andUnited Airlines from London to Fremont have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.5
Good
899 reviews
Check prices

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Overall

7.5

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
Austrian Airlines
7.5
Good
899 reviews
Austrian Airlines
7.5
Good
899 reviews
Check prices

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Overall

7.5

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
Virgin Atlantic
7.5
Good
679 reviews
Austrian Airlines
7.5
Good
899 reviews
Check prices

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Overall

7.5

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
United Airlines
7.4
Good
9,330 reviews
Austrian Airlines
7.5
Good
899 reviews
Check prices

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Overall

7.5

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
Lufthansa
6.8
Okay
7,795 reviews
Austrian Airlines
7.5
Good
899 reviews
Check prices

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Overall

7.5

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
British Airways
6.7
Okay
7,757 reviews
Austrian Airlines
7.5
Good
899 reviews
Check prices

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Overall

7.5

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.

Related info for your journey

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

  • How long is the flight from London to Fremont?

    For as low as £370, United Airlines can have you in Fremont from London in 15h 35m. London and Fremont are separated by a distance of 5350 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from London to Fremont one-way?

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as £269. However, be on the lookout for offers from WestJet and Scandinavian Airlines, as they are both options that can get you from London to Fremont for a low price.

  • What are the most popular routes from London to Fremont?

    The most popular route from London to Fremont is London Heathrow - San Francisco. You may also consider London Gatwick - San Francisco or London City - San Francisco.

  • What are the most reliable airlines from London to Fremont?

    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 to Fremont on time: KLM (79%), Air France (79%), Delta (79%).

  • What are the cheapest flights from London to Fremont?

    Looking at all options, your cheapest flight can be booked for £352. While the most popular route (London Heathrow - San Francisco) can be booked for £274 on average, our data indicates £1,996 when flying from London to Fremont.

  • Can I find deals for flights from London to Fremont that include hotel bookings?

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

  • How can I find direct flights from London to Fremont?

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

  • Can I find deals for business class flights from London to Fremont?

    Yes. Cheapflights offers flight deals from London to Fremont 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 to Fremont?

    Currently, February is the cheapest month in which you can book a flight from London to Fremont (average of £345). Flying from London to Fremont in July is currently the most expensive (average of £441). 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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Alternative routes for London to Fremont

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Top 10 airlines flying from London to Fremont

Discover the top 10 airlines that operate flights from London to Fremont. 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 21 February 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£237Average£569FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£334Average£478FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£337Average£549FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
SWISSCheapest£350Average£438FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Aer LingusCheapest£351Average£547FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£356Average£530FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£359Average£455FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
LufthansaCheapest£366Average£519FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Brussels AirlinesCheapest£371Average£482FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
FinnairCheapest£371Average£465FlexibilityNo cancel feeOn-time76%
Search Finnair flights

Fly with Cheapflights

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 London to Fremont?

Deals for London to Fremont flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from London to Fremont.

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

Yes, we can. To see specific flights from London to Fremont with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Yes, Cheapflights offers price alerts on London to Fremont flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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