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£243 Cheap Flights from San Diego (SAN) to London (LHR)

View £243 flight on Fri, 31 Jul 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 £243 for one-way flights and £643 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Virgin Atlantic
Tue, 13 Oct - Tue, 20 Oct
SAN
San Diego
LHR
London
£643 Return, found 2 days ago
£643
Return
found 2 days ago
Select Virgin Atlantic flight, departing Tue, 13 Oct from San Diego to London, returning Tue, 20 Oct, priced at £643 found 2 days ago
KLM
Tue, 13 Oct - Tue, 20 Oct
SAN
San Diego
LHR
London
£643 Return, found 2 days ago
£643
Return
found 2 days ago
Select KLM flight, departing Tue, 13 Oct from San Diego to London, returning Tue, 20 Oct, priced at £643 found 2 days ago
Virgin Atlantic
Tue, 13 Oct - Tue, 27 Oct
SAN
San Diego
LHR
London
£644 Return, found 5 days ago
£644
Return
found 5 days ago
Select Virgin Atlantic flight, departing Tue, 13 Oct from San Diego to London, returning Tue, 27 Oct, priced at £644 found 5 days ago
Lufthansa
Sun, 18 Oct - Tue, 17 Nov
SAN
San Diego
LHR
London
£649 Return, found 2 days ago
£649
Return
found 2 days ago
Select Lufthansa flight, departing Sun, 18 Oct from San Diego to London, returning Tue, 17 Nov, priced at £649 found 2 days ago
Air France
Tue, 13 Oct - Tue, 20 Oct
SAN
San Diego
LHR
London
£653 Return, found 2 days ago
£653
Return
found 2 days ago
Select Air France flight, departing Tue, 13 Oct from San Diego to London, returning Tue, 20 Oct, priced at £653 found 2 days ago
Alaska Airlines
Tue, 13 Oct - Tue, 20 Oct
SAN
San Diego
LHR
London
£655 Return, found 2 days ago
£655
Return
found 2 days ago
Select Alaska Airlines flight, departing Tue, 13 Oct from San Diego to London, returning Tue, 20 Oct, priced at £655 found 2 days ago
British Airways
Tue, 13 Oct - Tue, 20 Oct
SAN
San Diego
LHR
London
£665 Return, found 2 days ago
£665
Return
found 2 days ago
Select British Airways flight, departing Tue, 13 Oct from San Diego to London, returning Tue, 20 Oct, priced at £665 found 2 days ago
British Airways
Tue, 13 Oct - Tue, 20 Oct
SAN
San Diego
LHR
London
£665 Return, found 2 days ago
£665
Return
found 2 days ago
Select British Airways flight, departing Tue, 13 Oct from San Diego to London, returning Tue, 20 Oct, priced at £665 found 2 days ago
Finnair
Tue, 13 Oct - Tue, 20 Oct
SAN
San Diego
LHR
London
£669 Return, found 2 days ago
£669
Return
found 2 days ago
Select Finnair flight, departing Tue, 13 Oct from San Diego to London, returning Tue, 20 Oct, priced at £669 found 2 days ago
Iberia
Wed, 13 Jan - Wed, 27 Jan
SAN
San Diego
LHR
London
£672 Return, found 2 days ago
£672
Return
found 2 days ago
Select Iberia flight, departing Wed, 13 Jan from San Diego to London, returning Wed, 27 Jan, priced at £672 found 2 days 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 £962
LGW
Gatwick
Average driving time to city centre52 min
Flights from £962

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

March is typically the cheapest month to fly

From £441 - £652 per traveller.

Frequently asked questions

How much does a flight from San Diego, CA (SAN) to London (LHR) cost?
You can find one-way and return flights from San Diego, CA (SAN) to London (LHR) with Expedia. 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 our cheapest fares first, and use the Price Tracking tool to receive alerts when SAN to LHR ticket fares go up or down.
What is the cheapest month to fly from San Diego, CA (SAN) to London (LHR)?
The cheapest months to fly from San Diego, CA (SAN) to London (LHR) are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
Only one airline offers direct flights from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow). British Airways operates 14 direct flights from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow) every week.
How do I find cheap flights from San Diego, CA (SAN) to London (LHR)?
To find a cheap flight from San Diego, CA (SAN) to London (LHR), 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 time to fly from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
The cheapest months to fly from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow) are typically October and September, with average return flight prices around £516. However, the most popular months for this route are December and June, which means you'll find plenty of flight options during those times. If you're looking for the best balance between price and availability, you might consider flying in the shoulder seasons around these popular times to potentially find better deals while still having good flight choices.
What is the earliest flight from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
The earliest flight from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow) typically departs around 12:55 AM. This service is offered by American Airlines and British Airways. This is a seasonal service, active only in June. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow)?
When flying from San Diego, CA (SAN-San Diego Intl.) to London (LHR-Heathrow), you have a few options for flight duration. A nonstop flight typically takes around 10 hours 48 minutes. This route covers a distance of approximately 8,808 kilometers. If you opt for a flight with one stop, your journey will generally be longer, taking about 13 hours 48 minutes. Flights with two or more stops usually take even longer, around 17 hours. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some flexibility in your travel plans.
Can you fly business or first class from San Diego, CA (SAN) to London (LHR)?
Select the "Business class" and "First class" filters when looking for San Diego, CA (SAN) to London (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 (LHR) from San Diego, CA (SAN)?
If you're planning to travel to London from San Diego Intl. (SAN), you can fly directly into Heathrow (LHR) which offers international flights and connections. Some flights may connect through major hubs like Sky Harbor Intl. (PHX), Los Angeles Intl. (LAX), or 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) to London (LHR)?
If you booked your San Diego, CA (SAN) to London (LHR) 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
£643
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 £643 and range up to £672.  

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 October, 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.