Statistics on London-San Francisco flights: what is the right price and when to buy your plane ticket?
Best time to go: what is the RIGHT price for a round-trip flight to San Francisco (from: London)
The average price to go to San Francisco from London airport is $ 714 (round trip). However, there are variations depending on the departure month. Thus, it is possible to pay for your plane ticket on average between $ 579 (in february) and $ 1074 (in august), which is a saving of $ 135 or a surplus of $ 361 (compared to the average price) depending on the period you leave.
The analysis of all prices reveals that the most frequent price is between $540 to $594 and it is generally more economical to leave on a wednesday and return on a monday on a flight with 1 or more layovers.
Be careful, the cheapest months may correspond to unfavorable weather periods . Check out our page best time to go to San Francisco before booking your flight.
If you want to know when to book your flight at the best price, go straight to the second part of this page: When to buy your London-San Francisco plane ticket.
How are these data calculated?
We have studied a sample of 60000 airfare prices from previous years for flights to San Francisco from London and can thus establish precise and credible price variation trends based on different parameters. Of course, prices can vary from year to year, but the seasonal aspect of this data (recurrence of school holidays, events... from year to year) makes these statistics quite reliable.
Average price depending on the departure month
Data analysis:
By leaving in february, the price of the plane ticket will statistically be the cheapest ($ 579, saving $ 135 compared to the average price over the year which is $ 714). Conversely, august will be the most expensive ($ 1074).
Flight London-San Francisco: when is the best time to go for the best price?
| Month | Good price* | Average price | Our opinion |
|---|---|---|---|
| January | $ 546 | $ 693 | good price |
| February | $ 523 | $ 579 the cheapest | very good price |
| March | $ 524 | $ 607 | good price |
| April | $ 588 | $ 748 | fair price |
| May | $ 533 | $ 616 | good price |
| June | $ 637 | $ 748 | fair price |
| July | $ 680 | $ 846 | fair price |
| August | $ 927 | $ 1074 the most expensive | very high price |
| September | $ 540 | $ 602 | good price |
| October | $ 570 | $ 642 | good price |
| November | $ 527 | $ 601 | good price |
| December | $ 641 | $ 803 | fair price |
*great price to buy your plane ticket: if you see this price or cheaper during your flight search, go for it and buy it!
Price breakdown to travel from London to San Francisco
Data analysis:
The prices for flights from London to San Francisco range from $432 to $1350. 7% of tickets were purchased at the minimum price (from $432 to $486), 1% at the maximum price (from $1296 to $1350). The majority of plane tickets were purchased in the range of $540 to $594 (22% of tickets).
Cheapest airlines for the London->San Francisco flight
There are 14 companies that serve London from San Francisco airport: British Airways, Lufthansa, Virgin Atlantic, TAP, Brussels Airlines, Air France, Iberia, Austrian Airlines, Finnair, KLM, Delta, SAS, United and American Airlines.
Data analysis:
Of the 60000 flights analyzed in previous years, British Airways was the airline that offered the best fare most often in the flight ticket search results (22% of the time) on the London->San Francisco route.
Direct flight or flight with layover?
Data analysis:
To get the best price for the London-San Francisco flight, you should take a flight with one or more layovers (you will save an average of $ 65 compared to a direct flight).
Which day of the week to leave?
Data analysis:
Statistically, London-San Francisco flights departing on a wednesday are cheaper than on other days of the week. By choosing a wednesday as your departure date, you can save an average of $48. On the other hand, departing on a sunday may cost you an additional $126.
Which day of the week to come back?
Data analysis:
Statistically, return flights from San Francisco to London departing on a monday are cheaper than on other days of the week. By choosing a monday for your return date, you will save an average of $34. Conversely, departing from San Francisco on a saturday may cost you an additional $49.
Top prices London-San Francisco
| Round trip | Dates | Price | |
|---|---|---|---|
| London → San Francisco | 03-05 to 18-05-2025 | $ 514 | layover flight with KLM |
| London → San Francisco | 12-05 to 21-05-2025 | $ 499 | layover flight with British Airways |
| London → San Francisco | 13-05 to 20-05-2025 | $ 512 | layover flight with KLM |
| London → San Francisco | 06-09 to 11-09-2025 | $ 509 | layover flight with SAS |
| London → San Francisco | 07-09 to 28-09-2025 | $ 512 | layover flight with SAS |
| London → San Francisco | 02-10 to 11-10-2025 | $ 508 | layover flight with SAS |
| London → San Francisco | 03-10 to 12-10-2025 | $ 510 | layover flight with SAS |
| London → San Francisco | 20-10 to 30-10-2025 | $ 510 | layover flight with SAS |
| London → San Francisco | 15-01 to 29-01-2026 | $ 512 | layover flight with SAS |
| London → San Francisco | 13-02 to 20-02-2026 | $ 513 | layover flight with SAS |
When to book your flight London - San Francisco to get the cheapest price?
Statistically, you will make the biggest savings by buying your plane ticket between 4 to 5 months in advance. However, you may end up paying a high price if you book between 11 to 12 months in advance.
Did you know: the price of plane tickets not only varies depending on how far in advance you book, but also on the day of the week you book! So, to maximize your chances of getting the best price for a London-San Francisco flight, it is recommended to book your ticket on a sunday.
How far in advance should I buy my flight?
Data analysis:
To get the cheapest flight ticket from London to San Francisco, it is recommended to buy it 4 to 5 months before departure (it is then on average 675 $, which is a saving of 39 $ compared to the overall average price). On the other hand, if you buy your ticket 11 to 12 months in advance, you will pay the full price (174 $ more than the average price).
Depending on the departure month
The best time to buy your London to San Francisco flight ticket may vary depending on your departure month. Therefore, we offer you statistics on when to book your flight month by month.
| Departure on... | How far in advance should I book? |
|---|---|
| January | Best time: 8 to 9 months before departure (average price: 569 $) Other interesting period(s): 3 to 4 months ($ 635), 4 to 5 months ($ 662), 5 to 6 months ($ 653), 6 to 7 months ($ 581), 7 to 8 months ($ 604), 9 to 10 months ($ 658), 10 to 11 months ($ 661) |
| February | Best time: 7 to 8 months before departure (average price: 535 $) Other interesting period(s): 1 to 2 months ($ 542), 4 to 5 months ($ 548), 8 to 9 months ($ 535), 9 to 10 months ($ 560) |
| March | Best time: 8 to 9 months before departure (average price: 542 $) Other interesting period(s): 1 to 2 months ($ 598), 2 to 3 months ($ 576), 3 to 4 months ($ 600), 5 to 6 months ($ 564), 6 to 7 months ($ 560), 7 to 8 months ($ 601), 9 to 10 months ($ 549), 10 to 11 months ($ 561) |
| April | Best time: 0 to 1 month before departure (average price: 619 $) Other interesting period(s): 1 to 2 months ($ 700), 2 to 3 months ($ 739), 3 to 4 months ($ 680), 4 to 5 months ($ 726) |
| May | Best time: 10 to 11 months before departure (average price: 553 $) Other interesting period(s): 1 to 2 months ($ 612), 4 to 5 months ($ 569), 6 to 7 months ($ 612), 7 to 8 months ($ 592), 8 to 9 months ($ 580) |
| June | Best time: 9 to 10 months before departure (average price: 632 $) Other interesting period(s): 1 to 2 months ($ 745), 4 to 5 months ($ 733), 5 to 6 months ($ 686), 6 to 7 months ($ 705), 7 to 8 months ($ 717), 8 to 9 months ($ 688) |
| July | Best time: 6 to 7 months before departure (average price: 717 $) Other interesting period(s): 4 to 5 months ($ 838), 5 to 6 months ($ 814), 7 to 8 months ($ 830), 8 to 9 months ($ 779), 9 to 10 months ($ 803) |
| August | Best time: 7 to 8 months before departure (average price: 1000 $) Other interesting period(s): 8 to 9 months ($ 1001), 9 to 10 months ($ 1051) |
| September | Best time: 8 to 9 months before departure (average price: 558 $) Other interesting period(s): 1 to 2 months ($ 601), 2 to 3 months ($ 580), 3 to 4 months ($ 571), 4 to 5 months ($ 578), 7 to 8 months ($ 598), 9 to 10 months ($ 576) |
| October | Best time: 4 to 5 months before departure (average price: 579 $) Other interesting period(s): 2 to 3 months ($ 639), 3 to 4 months ($ 597), 5 to 6 months ($ 588), 6 to 7 months ($ 625), 9 to 10 months ($ 598) |
| November | Best time: 4 to 5 months before departure (average price: 532 $) Other interesting period(s): 2 to 3 months ($ 587), 5 to 6 months ($ 555), 6 to 7 months ($ 548), 7 to 8 months ($ 576), 8 to 9 months ($ 601), 9 to 10 months ($ 600), 10 to 11 months ($ 581) |
| December | Best time: 3 to 4 months before departure (average price: 672 $) Other interesting period(s): 2 to 3 months ($ 757), 4 to 5 months ($ 701), 5 to 6 months ($ 672), 6 to 7 months ($ 715), 7 to 8 months ($ 755), 8 to 9 months ($ 744), 9 to 10 months ($ 724), 10 to 11 months ($ 796) |
What day of the week should I book my flight ticket?
Data analysis:
Statistically, sunday is the day when plane tickets for London->San Francisco are the cheapest. So, by buying your plane ticket on a sunday, you will save $13. Conversely, by buying it on a friday, you may end up paying $15 more.
London to San Francisco: flight price when booking today
Information: this data is not statistics but comes from real prices collected less than 7 days ago. Some months may not be available as we do not have enough data for them.
| Month | Current price | Our opinion | |
|---|---|---|---|
| April 2025 | $ 782 $534 to $1304 | high price | Find a flight |
| May 2025 | $ 759 $499 to $6312 | high price | Find a flight |
| June 2025 | $ 724 $585 to $2392 | very good price | Find a flight |
| July 2025 | $ 847 $615 to $2172 | fair price | Find a flight |
| August 2025 | $ 1079 $756 to $2279 | fair price | Find a flight |
| September 2025 | $ 543 $503 to $633 | very good price | Find a flight |
| October 2025 | $ 725 $508 to $2004 | high price | Find a flight |
| November 2025 | $ 701 $512 to $1446 | high price | Find a flight |
| December 2025 | $ 753 $548 to $1176 | very good price | Find a flight |
| January 2026 | $ 675 $512 to $1945 | very good price | Find a flight |
| February 2026 | $ 590 $510 to $802 | high price | Find a flight |
| March 2026 | $ 1146 $520 to $4332 | very high price | Find a flight |
Data analysis:
Compared to the average price, june, september, december and january are cheaper to travel to San Francisco. So it may be interesting to book now to leave during these months!