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Cheap flights from London to Fremont from £361

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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SFO
22 Apr — 29 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Fremont are usually found in February or September, booked 51 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

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 23 March 2026.

Mon 1/610:35
LHR
-
SFO
Nonstop11h 00m
United Airlines
Tue 9/622:35
SFO
-
LHR
1 stop14h 05m
United Airlines
Deal found 19/3£397
Wed 26/806:40
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Thu 3/916:45
SFO
-
LHR
1 stop16h 55m
Scandinavian Airlines
Deal found 20/3£400
Wed 19/810:45
LHR
-
SFO
Nonstop11h 05m
British Airways
Mon 24/819:30
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 19/3£401
Wed 26/814:20
LHR
-
SFO
Nonstop11h 10m
British Airways
Thu 3/916:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 20/3£403
Wed 12/810:45
LHR
-
SFO
Nonstop11h 05m
British Airways
Wed 19/819:30
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 19/3£406
Tue 21/710:00
LHR
-
SFO
1 stop16h 30m
United Airlines
Tue 28/719:45
SFO
-
LHR
Nonstop10h 25m
United Airlines
Deal found 19/3£418
Mon 4/506:40
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Mon 11/516:45
SFO
-
LHR
1 stop17h 45m
Scandinavian Airlines
Deal found 20/3£437
Thu 21/519:50
LHR
-
SFO
2 stops26h 50m
Scandinavian Airlines
Thu 28/516:45
SFO
-
LHR
1 stop20h 55m
Scandinavian Airlines
Deal found 20/3£438
Mon 20/406:00
LHR
-
SFO
1 stop18h 15m
Multiple Airlines
Mon 27/407:25
SFO
-
LHR
1 stop21h 55m
Multiple Airlines
Deal found 20/3£440
Sun 19/406:00
LHR
-
SFO
1 stop18h 15m
SWISS
Sun 26/419:35
SFO
-
LHR
1 stop14h 15m
SWISS
Deal found 22/3£441
Fri 24/409:25
LGW
-
SFO
1 stop14h 50m
SWISS
Sun 3/513:15
SFO
-
LGW
1 stop35h 05m
SWISS
Deal found 22/3£442
Thu 16/418:35
LGW
-
SFO
1 stop29h 40m
SWISS
Wed 29/419:35
SFO
-
LGW
1 stop14h 20m
SWISS
Deal found 20/3£446

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 23 March 2026.

Round-trip from

£397

One-way from

£361

Popular in

December

Cheapest in

February

Average price

£486
United Airlines
  • United Airlines
  • 1/6-9/6
  • 1 total stop
  • 25h 05m total
  • London to Fremont
Search Deals
Lufthansa
  • Lufthansa
  • 12/5
  • 2 total stops
  • 23h 20m total
  • London to Fremont
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£21 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 March 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 23 March 2026.
Use the filters below to find and compare flights from London to Fremont that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 11/5

08:40-16:15

1 stop15h 35m

San Francisco

Mon 18/5

16:35-11:10

Nonstop10h 35m

£457

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 16/4

13:30-20:00

1 stop14h 30m

San Francisco

Wed 29/4

12:45-10:40

1 stop13h 55m

£463

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 21/8

12:10-16:15

1 stop36h 05m

San Francisco

Fri 11/9

22:55-06:55

1 stop24h 00m

£464

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 3/5

06:30-12:40

1 stop14h 10m

San Francisco

Sun 10/5

16:35-11:10

Nonstop10h 35m

£467

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 15/5

08:40-16:30

1 stop15h 50m

San Francisco

Fri 22/5

20:55-10:10

1 stop29h 15m

£467

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 9/4

08:45-16:15

1 stop15h 30m

San Francisco

Wed 15/4

00:45-06:45

1 stop22h 00m

£470

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 6/4

07:25-14:30

1 stop15h 05m

San Francisco

Mon 13/4

21:15-20:40

1 stop15h 25m

£473

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 18/4

07:40-15:55

1 stop16h 15m

San Francisco

Sat 25/4

16:35-11:00

Nonstop10h 25m

£474

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 16/4

20:05-16:15

1 stop28h 10m

San Francisco

Fri 8/5

14:00-16:35

2 stops18h 35m

£483
Fastest return journey

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 15/4

10:35-13:40

Nonstop11h 05m

San Francisco

Thu 30/4

16:35-11:10

Nonstop10h 35m

£484

Flights are sorted by cheapest return flights first.

Deals found on 21/3

Showing 1-10 of 60 resultsSorted by cheapest first
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2
3
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6

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 13 March 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 51 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 £356). Flying from London to Fremont in July is currently the most expensive (average of £439). 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 23 March 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 23 March 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).

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 23 March 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
7.6
Good
902 reviews
Check prices

Boarding

7.6

Overall

7.6

Comfort

7.3

Entertainment

6.8

Crew

8.1

Food

6.8

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
7.6
Good
902 reviews
Austrian Airlines
7.6
Good
902 reviews
Check prices

Boarding

7.6

Overall

7.6

Comfort

7.3

Entertainment

6.8

Crew

8.1

Food

6.8

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
685 reviews
Austrian Airlines
7.6
Good
902 reviews
Check prices

Boarding

7.6

Overall

7.6

Comfort

7.3

Entertainment

6.8

Crew

8.1

Food

6.8

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
9,463 reviews
Austrian Airlines
7.6
Good
902 reviews
Check prices

Boarding

7.6

Overall

7.6

Comfort

7.3

Entertainment

6.8

Crew

8.1

Food

6.8

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
7,863 reviews
Austrian Airlines
7.6
Good
902 reviews
Check prices

Boarding

7.6

Overall

7.6

Comfort

7.3

Entertainment

6.8

Crew

8.1

Food

6.8

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
7,812 reviews
Austrian Airlines
7.6
Good
902 reviews
Check prices

Boarding

7.6

Overall

7.6

Comfort

7.3

Entertainment

6.8

Crew

8.1

Food

6.8

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 £463, United Airlines can have you in Fremont from London in 14h 30m. 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 £272. 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 Stansted - 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 (93%), Air France (93%), Delta (93%).

  • What are the cheapest flights from London to Fremont?

    Looking at all options, your cheapest flight can be booked for £377. While the most popular route (London Heathrow - San Francisco) can be booked for £346 on average, our data indicates £2,064 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 £356). Flying from London to Fremont in July is currently the most expensive (average of £439). 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 23 March 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£323Average£589FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£337Average£468FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£340Average£550FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Aer LingusCheapest£353Average£507FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
SWISSCheapest£354Average£453FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Scandinavian AirlinesCheapest£361Average£553FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£362Average£456FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
LufthansaCheapest£370Average£534FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Brussels AirlinesCheapest£375Average£490FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
FinnairCheapest£376Average£488FlexibilityNo 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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