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Cheap flights from London to Fremont from £379

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 23/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SFO
23 Dec — 30 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London to Fremont are usually found in September or February, booked 51 days in advance, depart on a Thursday or Tuesday and return on a Wednesday

Cheap 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 November 2025.

Round-trip from

£440

One-way from

£379

Popular in

July

Cheapest in

September

Average price

£473
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 12/1-26/1
  • 2 total stops
  • 38h 40m total
  • London to Fremont
Search Deals
Austrian Airlines
  • Austrian Airlines
  • 23/3
  • Nonstop
  • 11h 15m total
  • London to Fremont
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£62 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find 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 November 2025.

Sun 23/1116:30LHR - SFO
1 stop30h 05mTAP AIR PORTUGAL
Mon 1/1216:35SFO - LHR
1 stop21h 00mTAP AIR PORTUGAL
Deal found 22/11£441
Fri 12/1219:50LHR - SFO
2 stops26h 45mScandinavian Airlines
Sun 11/116:40SFO - LHR
2 stops15h 45mScandinavian Airlines
Deal found 22/11£442
Mon 24/1106:00LHR - SFO
1 stop16h 35mTAP AIR PORTUGAL
Mon 1/1216:35SFO - LHR
1 stop21h 00mTAP AIR PORTUGAL
Deal found 23/11£443
Mon 15/1206:00LHR - SFO
1 stop16h 35mTAP AIR PORTUGAL
Wed 21/116:35SFO - LHR
1 stop16h 55mTAP AIR PORTUGAL
Deal found 23/11£443
Fri 12/1219:50LHR - SFO
2 stops26h 45mScandinavian Airlines
Sun 18/116:40SFO - LHR
1 stop15h 20mScandinavian Airlines
Deal found 23/11£447
Tue 9/1216:35LGW - SFO
1 stop29h 55mTAP AIR PORTUGAL
Mon 12/116:35SFO - LGW
1 stop15h 10mTAP AIR PORTUGAL
Deal found 22/11£448
Fri 12/1213:40LHR - SFO
1 stop33h 05mTAP AIR PORTUGAL
Mon 19/116:35SFO - LHR
1 stop16h 55mTAP AIR PORTUGAL
Deal found 23/11£453
Sat 6/1206:40LHR - SFO
1 stop15h 55mScandinavian Airlines
Mon 12/116:40SFO - LHR
1 stop17h 50mScandinavian Airlines
Deal found 23/11£456
Sun 23/1110:40LGW - SFO
1 stop35h 55mTAP AIR PORTUGAL
Mon 1/1216:35SFO - LGW
1 stop15h 10mTAP AIR PORTUGAL
Deal found 22/11£459
Sun 14/1218:30LHR - SFO
1 stop28h 05mTAP AIR PORTUGAL
Mon 12/116:35SFO - LHR
1 stop16h 55mTAP AIR PORTUGAL
Deal found 23/11£460
Mon 8/1206:40LHR - SFO
1 stop15h 55mScandinavian Airlines
Sun 18/116:40SFO - LHR
1 stop15h 20mScandinavian Airlines
Deal found 23/11£466
Wed 3/1217:00LHR - SFO
1 stop29h 35mScandinavian Airlines
Mon 8/1216:40SFO - LHR
1 stop15h 20mScandinavian Airlines
Deal found 23/11£467

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 November 2025.
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

LGW - SFO

LGWSFO

London Gatwick

Wed 4/2

09:35-16:05

2 stops62h 30m

San Francisco

Wed 18/2

16:35-09:50

1 stop33h 15m

£443

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Fri 6/2

15:15-14:35

2 stops31h 20m

San Francisco

Mon 9/2

16:40-21:20

2 stops20h 40m

£444

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

Mon 12/1

21:25-14:30

2 stops49h 05m

San Francisco

Mon 26/1

16:35-15:45

1 stop15h 10m

£453

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 1/3

19:50-14:35

2 stops26h 45m

San Francisco

Sun 22/3

17:40-18:50

2 stops18h 10m

£482

LondonSan Francisco

LTN - SFO

LTNSFO

London Luton

Tue 24/2

09:00-15:35

1 stop14h 35m

San Francisco

Tue 3/3

17:20-20:05

1 stop18h 45m

£482

LondonSan Francisco

LTN - SFO

LTNSFO

London Luton

Mon 12/1

08:50-15:35

1 stop14h 45m

San Francisco

Tue 27/1

17:20-20:05

1 stop18h 45m

£487

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

Wed 4/2

18:40-16:30

1 stop29h 50m

San Francisco

Sun 8/2

19:25-17:50

1 stop14h 25m

£495

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 15/1

09:00-16:30

1 stop15h 30m

San Francisco

Mon 16/2

12:50-07:25

Nonstop10h 35m

£496

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 21/3

06:40-15:35

1 stop15h 55m

San Francisco

Tue 24/3

16:15-17:40

2 stops18h 25m

£497

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 1/4

06:30-11:45

1 stop13h 15m

San Francisco

Wed 15/4

15:55-10:40

Nonstop10h 45m

£499

Flights are sorted by cheapest return flights first.

Deals found on 22/11

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 21 November 2025.

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, April is the cheapest month in which you can book a flight from London to Fremont (average of £348). Flying from London to Fremont in July is currently the most expensive (average of £468). 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 November 2025.

One of the essential ways to save on airfare from London to Fremont is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the evening could potentially save you up to 22% on airfare.

What is the cheapest day to fly from London to Fremont?

Use this chart to determine the cheapest time to fly return from London to Fremont. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London to Fremont flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 2025.

The most flights from LON to FR8 are scheduled on a Tuesday (31 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (25 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 23 November 2025.
See what other customers who have flown with KLM, 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.
KLM
7.7
Good
1,418 reviews
Check prices

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,418 reviews
KLM
7.7
Good
1,418 reviews
Check prices

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Virgin Atlantic
7.5
Good
674 reviews
KLM
7.7
Good
1,418 reviews
Check prices

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
United Airlines
7.4
Good
9,034 reviews
KLM
7.7
Good
1,418 reviews
Check prices

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Lufthansa
6.8
Okay
7,581 reviews
KLM
7.7
Good
1,418 reviews
Check prices

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
British Airways
6.7
Okay
7,535 reviews
KLM
7.7
Good
1,418 reviews
Check prices

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

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 £482, TAP AIR PORTUGAL can have you in Fremont from London in 26h 45m. 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 Lufthansa, with whom users have recently found tickets for as low as £382. However, be on the lookout for offers from United Airlines and British Airways, 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: Air New Zealand (84%), Air France (82%), Delta (82%).

  • What are the cheapest flights from London to Fremont?

    Looking at all options, your cheapest flight can be booked for £330. While the most popular route (London Heathrow - San Francisco) can be booked for £370 on average, our data indicates £2,195 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, April is the cheapest month in which you can book a flight from London to Fremont (average of £348). Flying from London to Fremont in July is currently the most expensive (average of £468). 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 November 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£243Average£526FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£344Average£506FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£346Average£566FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Aer LingusCheapest£359Average£576FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£359Average£486FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesCheapest£363Average£537FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
SWISSCheapest£367Average£451FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Brussels AirlinesCheapest£374Average£490FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
FinnairCheapest£379Average£501FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£379Average£461FlexibilityNo cancel feeOn-time75%
Search KLM 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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