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Cheap flights from San Francisco Bay Area to London Heathrow Airport

SFO — LHR
12 Dec — 19 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from San Francisco Bay Area to Heathrow

Popular in

June

Cheapest in

February

Average price

£626
Highest demand for flights based on searches. 15% potential increase in price (£97 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).
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Average for round-trip flights in November 2026
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Cheapflights Insights

Everything you need to know about your flight from San Francisco Bay Area to London Heathrow Airport

How far ahead should I book a flight from San Francisco Bay Area to London Heathrow Airport?

The best time to book flights from San Francisco Bay Area to London Heathrow Airport is 77 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from San Francisco Bay Area to London Heathrow Airport?

Currently, February is the cheapest month in which you can book a flight from San Francisco Bay Area to London Heathrow Airport (average of £492). Flying from San Francisco Bay Area to London Heathrow Airport in June is currently the most expensive (average of £994). 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 XIH to LHR?

One of the essential ways to save on airfare from San Francisco Bay Area to London Heathrow Airport is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the morning could potentially save you up to 33% on airfare.

What is the cheapest day to fly from San Francisco Bay Area to London Heathrow Airport?

Travellers seeking maximum savings on their San Francisco Bay Area to London Heathrow Airport flight should consider departing on Saturday at midday when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Heathrow

Check out reviews from past customers who have flown with KLM,Delta, andVirgin Atlantic from San Francisco Bay Area to London Heathrow Airport to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,599 reviews
Check prices

Entertainment

7.2

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
8.0
Excellent

Kushal,Sept 2026

QRO - ATL

It was a nice one. Crew were friendly and helpful.
KLM
7.8
Good
1,599 reviews
KLM
7.8
Good
1,599 reviews
Check prices

Entertainment

7.2

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
8.0
Excellent

Kushal,Sept 2026

QRO - ATL

It was a nice one. Crew were friendly and helpful.
Delta
7.8
Good
8,708 reviews
KLM
7.8
Good
1,599 reviews
Check prices

Entertainment

7.2

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
8.0
Excellent

Kushal,Sept 2026

QRO - ATL

It was a nice one. Crew were friendly and helpful.
Virgin Atlantic
7.5
Good
698 reviews
KLM
7.8
Good
1,599 reviews
Check prices

Entertainment

7.2

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
8.0
Excellent

Kushal,Sept 2026

QRO - ATL

It was a nice one. Crew were friendly and helpful.
United Airlines
7.3
Good
10,477 reviews
KLM
7.8
Good
1,599 reviews
Check prices

Entertainment

7.2

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
8.0
Excellent

Kushal,Sept 2026

QRO - ATL

It was a nice one. Crew were friendly and helpful.
British Airways
6.7
Okay
8,280 reviews
KLM
7.8
Good
1,599 reviews
Check prices

Entertainment

7.2

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
8.0
Excellent

Kushal,Sept 2026

QRO - ATL

It was a nice one. Crew were friendly and helpful.

Related info for your journey

  • What are the cheapest airlines to fly from San Francisco Bay Area to London Heathrow Airport one-way?

    £173 is the cheapest one-way deal found within the past few days, from Virgin Atlantic. You may also be able to find cheap deals on JetBlue and KLM, with prices starting from £247 and £267, respectively.

  • What are the most popular routes from San Francisco Bay Area to London Heathrow Airport?

    Most travelers choose San Francisco - London Heathrow, San Jose - London Heathrow or Oakland - London Heathrow when deciding on the best route from San Francisco Bay Area to London Heathrow Airport.

  • What are the most reliable airlines from San Francisco Bay Area to London Heathrow Airport?

    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 San Francisco Bay Area to London Heathrow Airport on time: Air Canada (83%), Austrian Airlines (83%), United Airlines (83%).

  • What are the cheapest flights from San Francisco Bay Area to London Heathrow Airport?

    Looking for the cheapest flight from San Francisco Bay Area to London Heathrow Airport? While on average our users pay £821, our data indicates the cheapest price to be £281. The most popular route (San Francisco - London Heathrow), is priced around £415.

  • Can I find deals for flights from San Francisco Bay Area to Heathrow that include hotel bookings?

    Yes. In addition to deals on San Francisco Bay Area to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from San Francisco Bay Area to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco Bay Area to Heathrow.

  • Can I find deals for business class flights from San Francisco Bay Area to Heathrow?

    Yes. Cheapflights offers flight deals from San Francisco Bay Area to Heathrow 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 San Francisco Bay Area to London Heathrow Airport?

    Currently, February is the cheapest month in which you can book a flight from San Francisco Bay Area to London Heathrow Airport (average of £492). Flying from San Francisco Bay Area to London Heathrow Airport in June is currently the most expensive (average of £994). 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Luton
Wembley
Milton Keynes
Gatwick
Slough
Ilford
Hayes
Folkestone
Eastbourne
Croydon
Barnet
Northampton
Southall
Southend-on-Sea
Enfield
Brentford
Dover
Harrow
Watford

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from San Francisco Bay Area to Heathrow

AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£444Average£583FlexibilityNo cancel feeOn-time72%
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KLMCheapest£458Average£733FlexibilityNo cancel feeOn-time75%
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British AirwaysCheapest£490Average£792FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£496Average£846FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest£590Average£901FlexibilityNo cancel feeOn-timeN/A
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Fly with Cheapflights

How does Cheapflights help users find flights from San Francisco Bay Area to Heathrow?

Deals for San Francisco Bay Area to Heathrow 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 San Francisco Bay Area to Heathrow?

Cheapflights helps you find that perfect flight to Heathrow from San Francisco Bay Area by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from San Francisco Bay Area to Heathrow with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from San Francisco Bay Area to Heathrow flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from San Francisco Bay Area to Heathrow become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Heathrow from San Francisco Bay Area today and book when prices fit your budget.

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