Question 1

What cabin class options are available on San Francisco to London flights?

Accepted Answer

There are 1 cabin classes available to choose from on San Francisco to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Question 2

How have San Francisco to London flight prices changed over time?

Accepted Answer

As of July 2025, prices for San Francisco to London flights are approximately 19% more expensive when compared to flights at the same time last year.

Question 3

What is the cheapest time of day to depart on your flight to London?

Accepted Answer

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as R25 867. Try not to purchase tickets in the evening because they tend to be around R25 887. Of course, these prices can vary depending on the time of year and what airport you fly to.

Question 4

How far in advance should I book a flight to London?

Accepted Answer

You are more likely to see cheaper flights to London from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around R13 763 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from San Francisco for as low as R12 768 on momondo.

Question 5

What is the cheapest month to fly to London?

Accepted Answer

The month of October is, on average, the cheapest month to fly to London from San Francisco, with most prices found around R11 407. If you are unable to visit London during the month of October, then departing from San Francisco during the month September is also very affordable. Most momondo users find prices during this month for around R11 801.

Question 6

What is the cheapest day to depart on your flight to London?

Accepted Answer

The cheapest day to depart on your flight to London is on a Tuesday when prices can be found for as low as R22 686. This is often the case because there is less demand to fly during this day of the week. On the other hand, Thursday is the most expensive day to depart from San Francisco because it is more convenient for both business and leisure travellers. As a result, prices tend to be around R32 523.

Question 7

What is the cheapest San Francisco to London flight route?

Accepted Answer

Fly from San Francisco to London Heathrow for the best San Francisco - London flight prices

Question 8

When did momondo last update prices for flights from San Francisco Airport to London?

Accepted Answer

Prices for flights from San Francisco Airport to London refresh daily.

Question 9

How old do you have to be to fly from San Francisco Airport to London?

Accepted Answer

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Francisco Airport to London.

Question 10

What documentation or ID do you need to fly to London?

Accepted Answer

The required travel and health documents for your London trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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What is the cheapest month to fly to London?

What is the cheapest day to depart on your flight to London?

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as R25 867. Try not to purchase tickets in the evening because they tend to be around R25 887. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest San Francisco to London flight route?

Fly from San Francisco to London Heathrow for the best San Francisco - London flight prices

How far in advance should I book a flight to London?

What cabin class options are available on San Francisco to London flights?

There are 1 cabin classes available to choose from on San Francisco to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have San Francisco to London flight prices changed over time?

As of July 2025, prices for San Francisco to London flights are approximately 19% more expensive when compared to flights at the same time last year.

When to book flights from San Francisco to London

Cheap San Francisco to London (SFO to LON) flight deals and tips

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How far is San Francisco to London by plane?

When did momondo last update prices for flights from San Francisco Airport to London?

How old do you have to be to fly from San Francisco Airport to London?

What documentation or ID do you need to fly to London?

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