£244 Cheap Flights from San Diego (SAN) to London (LHR)

View £244 flight on Tue, 20 Oct 2026Opens in a new window

Popular airlines from San Diego Intl. Airport (SAN) to Heathrow Airport (LHR)

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Cheap Flights from San Diego (SAN) to London (LHR)

Prices were available within the past 7 days and start at £244 for one-way flights and £639 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KLM
Wed, 9 Sept - Thu, 17 Sept
SAN
San Diego
LHR
London
£639 Return, found 4 hours ago
£639
Return
found 4 hours ago
Select KLM flight, departing Wed, 9 Sept from San Diego to London, returning Thu, 17 Sept, priced at £639 found 4 hours ago
Virgin Atlantic
Mon, 7 Sept - Mon, 14 Sept
SAN
San Diego
LHR
London
£639 Return, found 5 days ago
£639
Return
found 5 days ago
Select Virgin Atlantic flight, departing Mon, 7 Sept from San Diego to London, returning Mon, 14 Sept, priced at £639 found 5 days ago
KLM
Wed, 7 Oct - Wed, 28 Oct
SAN
San Diego
LHR
London
£640 Return, found 19 hours ago
£640
Return
found 19 hours ago
Select KLM flight, departing Wed, 7 Oct from San Diego to London, returning Wed, 28 Oct, priced at £640 found 19 hours ago
Virgin Atlantic
Sun, 20 Sept - Mon, 28 Sept
SAN
San Diego
LHR
London
£642 Return, found 5 days ago
£642
Return
found 5 days ago
Select Virgin Atlantic flight, departing Sun, 20 Sept from San Diego to London, returning Mon, 28 Sept, priced at £642 found 5 days ago
Virgin Atlantic
Sun, 20 Sept - Mon, 28 Sept
SAN
San Diego
LHR
London
£643 Return, found 5 days ago
£643
Return
found 5 days ago
Select Virgin Atlantic flight, departing Sun, 20 Sept from San Diego to London, returning Mon, 28 Sept, priced at £643 found 5 days ago
Virgin Atlantic
Sun, 20 Sept - Thu, 24 Sept
SAN
San Diego
LHR
London
£644 Return, found 1 day ago
£644
Return
found 1 day ago
Select Virgin Atlantic flight, departing Sun, 20 Sept from San Diego to London, returning Thu, 24 Sept, priced at £644 found 1 day ago
Air France
Sun, 6 Sept - Thu, 10 Sept
SAN
San Diego
LHR
London
£649 Return, found 4 days ago
£649
Return
found 4 days ago
Select Air France flight, departing Sun, 6 Sept from San Diego to London, returning Thu, 10 Sept, priced at £649 found 4 days ago
Alaska Airlines
Wed, 4 Nov - Wed, 11 Nov
SAN
San Diego
LHR
London
£651 Return, found 3 days ago
£651
Return
found 3 days ago
Select Alaska Airlines flight, departing Wed, 4 Nov from San Diego to London, returning Wed, 11 Nov, priced at £651 found 3 days ago
Finnair
Wed, 9 Sept - Thu, 17 Sept
SAN
San Diego
LHR
London
£660 Return, found 4 hours ago
£660
Return
found 4 hours ago
Select Finnair flight, departing Wed, 9 Sept from San Diego to London, returning Thu, 17 Sept, priced at £660 found 4 hours ago
Iberia
Sun, 23 Aug - Thu, 27 Aug
SAN
San Diego
LHR
London
£661 Return, found 16 hours ago
£661
Return
found 16 hours ago
Select Iberia flight, departing Sun, 23 Aug from San Diego to London, returning Thu, 27 Aug, priced at £661 found 16 hours ago

Alternative airports near London

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Gatwick LGW. Average driving time to city centre is 52 minutes. Flights from £1,150
LGW
Gatwick
Average driving time to city centre52 min
Flights from £1,150

Find the cheapest month to fly from San Diego (SAN) to London (LHR)

May is typically the cheapest month to fly

From £530 - £977 per traveller.

Frequently asked questions

How much does a flight from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow) cost?
One-way flights typically cost between £332 and £2,488 and return flights often range between £723 and £4,702. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
What is the cheapest month to fly from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
October is typically the cheapest month to fly from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow), with average return fares of approximately £516. This is about 21% lower than the average price throughout the year. October sees lower prices because it falls outside the peak summer travel season, when demand drops and airlines compete for bookings. September and November are also good months to find deals on this route.
Which airlines fly direct from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
Enter SAN to LHR and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
To find a cheap flight from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
The best airline to fly with from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow) will differ from traveller to traveller. If you like to fly early, BA offers early morning flights. If price is the most important factor, BA typically offers the lowest fares. AA offers the most daily flights from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
Based on booking data from the past year, the cheapest months to fly from San Diego International Airport (SAN) to London Heathrow (LHR) are typically September and October, with average return flights around £516. While these months offer great value, the most popular times to travel are December and June, meaning you'll find plenty of flight options then. If you're looking for the best balance of price and availability, aiming for September or October could give you a good deal, though you might find more direct options during the peak travel months.
How many flights per day from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
There are approximately 2 nonstop flights per day from San Diego Intl. (SAN) to Heathrow (LHR). For even more choice, look at flights that include layovers. You'll find around 148 connecting flights per day. Some common connection points include O'Hare Intl. (ORD), John F. Kennedy Intl. (JFK), and Logan Intl. (BOS).
What is the earliest flight from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
The earliest flight from San Diego International Airport (SAN) to London Heathrow (LHR) typically departs at approximately 12:55 AM local time. This service is operated by American Airlines and British Airways. This is a seasonal service active in June. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
You'll typically find the most flights from San Diego Intl. (SAN) to Heathrow (LHR) on a Wednesday, with around 104 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include American Airlines, United Airlines, and Delta Air Lines.
What are the most popular departure times for flights from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
The most popular departure times for flights from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow) are in the afternoon, from 12pm to 3pm. Approximately 25% of passengers prefer this time window. Many major carriers, including United Airlines, American Airlines and Delta Air Lines, offer flights during this window. This timing works well because it allows for a relaxed morning before heading to the airport, and you'll arrive in London ready to start your day.
How long does it take to fly from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
Direct flights from SAN to LHR usually take about 10 hours 50 minutes, traveling roughly 5,473 miles. If you opt for a connecting flight, expect to add around 3 hours 10 minutes to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
Select the "Business class" and "First class" filters when looking for SAN to LHR flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow) flight with Expedia?
It's easy to earn miles on a San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for London from San Diego Intl. (SAN)?
From San Diego Intl. (SAN), you can fly into Gatwick (LGW), London Intl. (YXU), Heathrow (LHR) and London City (LCY) in London. Some flights may connect through major hubs like Charlotte-Douglas Intl. (CLT), Dallas-Fort Worth Intl. (DFW), O'Hare Intl. (ORD) before reaching London. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow) at the last minute?
Typically, booking a last minute flight from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow) flight and hotel package?
Securing a San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
If you booked your San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
San Diego Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, United, Virgin Atlantic, WestJet
Return price
£638
Distance
8756 km
Average flight time
18 hours 42 mins

Book with confidence

Compare flights from San Diego to London easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from San Diego to London. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Heathrow in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from San Diego Intl. to Heathrow.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from San Diego Intl. (SAN) to Heathrow (LHR)

The easiest way to view the best deals on flights from San Diego to London today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from San Diego Intl. to Heathrow start at just £639 and range up to £661.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near San Diego and London
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your San Diego to London flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from San Diego Intl. to Heathrow for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from San Diego to London easily and book with confidence

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*Available to Expedia members.