United's Polaris Class offers lie-flat seats, Saks bedding, and upscale amenities for long-haul flights.
United's Premium Plus offers extra legroom, upgraded meals, and priority check-in on international routes.

Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $595 (Cheapflightsfares) |
One-way from | $375 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $657 |
Good round-trip deal | $707 or less |
Good one-way deal | $384 or less |
Fly from
Fly to
Route
Depart
Return
Price
San FranciscoLondon
SFO - LTN
SFOLTN
San Francisco
Mon 3/16
8:25 pm-1:15 pm
2 stops33h 50m
London Luton
Thu 4/23
5:40 am-5:55 pm
1 stop20h 15m
San FranciscoLondon
SFO - LHR
SFOLHR
San Francisco
Mon 2/23
4:40 pm-4:00 pm
1 stop15h 20m
London Heathrow
Mon 8/17
7:50 pm-2:40 pm
2 stops26h 50m
San FranciscoLondon
SFO - LHR
SFOLHR
San Francisco
Tue 5/12
5:55 pm-12:15 pm
Nonstop10h 20m
London Heathrow
Fri 5/22
6:30 am-11:45 am
1 stop13h 15m
San FranciscoLondon
SFO - LHR
SFOLHR
San Francisco
Sun 4/12
4:35 pm-11:00 am
Nonstop10h 25m
London Heathrow
Tue 4/21
8:50 am-3:50 pm
1 stop15h 00m
San FranciscoLondon
SFO - LTN
SFOLTN
San Francisco
Sun 3/22
8:25 pm-12:00 pm
2 stops32h 35m
London Luton
Tue 3/31
5:40 am-5:55 pm
1 stop20h 15m
San FranciscoLondon
SFO - LHR
SFOLHR
San Francisco
Sun 5/10
11:05 am-10:15 am
1 stop15h 10m
London Heathrow
Fri 5/22
6:30 am-11:45 am
1 stop13h 15m
San FranciscoLondon
SFO - LHR
SFOLHR
San Francisco
Wed 3/18
5:30 pm-10:40 am
Nonstop10h 10m
London Heathrow
Wed 4/1
12:45 pm-3:45 pm
Nonstop11h 00m
San FranciscoLondon
SFO - LHR
SFOLHR
San Francisco
Sun 5/10
7:40 pm-2:10 pm
Nonstop10h 30m
London Heathrow
Thu 5/21
10:35 am-1:35 pm
Nonstop11h 00m
San FranciscoLondon
SFO - LHR
SFOLHR
San Francisco
Mon 5/4
7:30 pm-1:55 pm
Nonstop10h 25m
London Heathrow
Wed 5/27
9:50 am-3:50 pm
1 stop14h 00m
San FranciscoLondon
SFO - LTN
SFOLTN
San Francisco
Thu 4/16
7:40 pm-7:15 pm
1 stop15h 35m
London Luton
Thu 4/23
5:40 am-5:55 pm
1 stop20h 15m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*1 star |
The price you pay for your flight from San Francisco to London may vary depending on when you book. For the best chance of a lower fare, look to book 38 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Currently, October is the cheapest month in which you can book a flight from San Francisco to London (average of $497). Flying from San Francisco to London in June is currently the most expensive (average of $807). 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.
One of the essential ways to save on airfare from San Francisco to London is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 12% on airfare.
Travelers seeking maximum savings on their San Francisco to London flight should consider departing on Monday mornings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from SFO to LON are scheduled on a Monday (31 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (25 on average).
New York (JFK) – chosen by Cheapflights users on 50% of 1-stop itineraries from San Francisco to London on Cheapflights.
Dublin (DUB) is the most affordable 1-stop option, with an average round-trip price of $598.
Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 13h 10m.
Flights via New York (JFK) offer the fastest connection on this route, with an average layover time of 1h 34m.
About 11% of weekly flights between San Francisco and London have experienced delays in the past year, with the average delay time being 153 minutes.
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
Monday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.
Over the last year, Virgin Atlantic have had the lowest number of delays on this route, with just 8% of flights being delayed.
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Entertainment
Food
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Aaron,Oct 2024
LAX - LHR
Crew
Entertainment
Food
Overall
Boarding
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Aaron,Oct 2024
LAX - LHR
Crew
Entertainment
Food
Overall
Boarding
Comfort
Reviews
Aaron,Oct 2024
LAX - LHR
Crew
Entertainment
Food
Overall
Boarding
Comfort
Reviews
Aaron,Oct 2024
LAX - LHR
Crew
Entertainment
Food
Overall
Boarding
Comfort
Reviews
Aaron,Oct 2024
LAX - LHR
Crew
Entertainment
Food
Overall
Boarding
Comfort
Reviews
Aaron,Oct 2024
LAX - LHR
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$151 | Average$830 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$334 | Average$602 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$339 | Average$538 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$494 | Average$655 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$513 | Average$703 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$514 | Average$709 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$522 | Average$841 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$561 | Average$692 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$568 | Average$848 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$570 | Average$861 | FlexibilityNo cancel fee | On-time69% |