Cheap flights from San Francisco to London Heathrow Airport
SFO — LHR
17 Dec — 24 Dec1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from San Francisco to London Heathrow are usually found in October or February, booked 63 days in advance, depart on a Friday or Thursday and return on a Wednesday
Cheap flight deals from San Francisco to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 17 November 2025.
Popular in
June
Cheapest in
October
Average price
₹ 61,613
Good round-trip deal
₹ 70,088 or less
Good one-way deal
₹ 45,448 or less
Highest demand for flights based on searches. 17% potential increase in price (₹ 1,294,050 potential increase over avg. return price).
Best time to book a flight from San Francisco to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow from San Francisco 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 San Francisco to London Heathrow Airport
Prices
Airlines
Delays
How far ahead should I book a flight from San Francisco to London Heathrow Airport?
Use this chart to determine the optimal time to book a return flight from San Francisco to Heathrow. Price data was last updated on 14 November 2025.
The price you pay for your flight from San Francisco to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 63 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 San Francisco to London Heathrow Airport?
Currently, October is the cheapest month in which you can book a flight from San Francisco to London Heathrow Airport (average of ₹ 44,060). Flying from San Francisco to London Heathrow Airport in June is currently the most expensive (average of ₹ 71,454). 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 SFO to LHR?
Find hourly flight availability from San Francisco to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 November 2025.
When flying from San Francisco to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 11% versus a flight in the morning.
Weekly flight availability from San Francisco to London Heathrow Airport
Explore weekly flight availability from San Francisco to Heathrow. 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 17 November 2025.
The most flights from SFO to LHR 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 often are flights from San Francisco to London delayed?
About 12% of weekly flights between San Francisco and London have experienced delays in the past year, with the average delay time being 156 minutes.
What is the most punctual flight time for San Francisco to London flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Monday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on San Francisco to London flights?
Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 8% of flights being delayed.
Reviews of airlines servicing Heathrow
Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 17 November 2025.
Read reviews from past customers who have flown with United Airlines
from San Francisco to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Related info for your journey
Find useful and relevant information for your journey from San Francisco to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
What airport do you fly from for flights from San Francisco to London Heathrow?
Most people fly from San Francisco (SFO) if they book a flight from San Francisco to London Heathrow. On average, San Francisco has 31 outbound flights to London Heathrow per day from 1 airline. San Francisco is conveniently located just 19.0 km from San Francisco’s city centre.
What is the cheapest airline to fly from San Francisco to London Heathrow Airport round-trip?
Cheapflights users have booked flights from San Francisco to London Heathrow Airport return from ₹ 43,910. United Airlines is currently priced 35% below the average price you’ll pay for this route.
What are the most reliable airlines from San Francisco to London Heathrow Airport?
No one likes to see their flight delayed. When booking a flight from San Francisco to London Heathrow Airport consider choosing American Airlines(87%), Aer Lingus(87%) or Alaska Airlines(87%), as they are the most reliable in getting you off to your destination on time.
Can I find deals for flights from San Francisco to Heathrow that include hotel bookings?
Yes. In addition to deals on San Francisco to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from San Francisco 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 to Heathrow.
Can I find deals for business class flights from San Francisco to Heathrow?
Yes. Cheapflights offers flight deals from San Francisco 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 to London Heathrow Airport?
Currently, October is the cheapest month in which you can book a flight from San Francisco to London Heathrow Airport (average of ₹ 44,060). Flying from San Francisco to London Heathrow Airport in June is currently the most expensive (average of ₹ 71,454). 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.
Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 17 November 2025.
Browse through other flights departing from San Francisco. Flights are based on user searches made on Cheapflights and were last updated on 17 November 2025.
Discover the top airline that operate flights from San Francisco to Heathrow. 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 454,620 searches. Data last updated 17 November 2025.
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 San Francisco to Heathrow?
Cheapflights makes it easy to find San Francisco to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.
Why should you use Cheapflights to find cheap flight tickets from San Francisco to Heathrow?
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 San Francisco to Heathrow.
Can Cheapflights find flights from San Francisco to Heathrow with no change fees?
Certainly. Search results for flights to Heathrow from San Francisco shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from San Francisco to Heathrow become cheaper?
Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!
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