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Cheap Flights from London Heathrow to San Diego International

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Compare London Heathrow to San Diego International flight deals

Find the cheapest month or even day of the year to fly to San Diego International

Book the best San Diego International fare with no extra fees

Flight deals from London Heathrow to San Diego International

Looking for a cheap last-minute deal or the best return flight from London Heathrow to San Diego International? Find the lowest prices on one-way and return tickets right here.
San Diego.$849 per passenger.Departing Thu, 1 May, returning Fri, 9 May.Return flight with Austrian Airlines.Outbound indirect flight with Austrian Airlines, departs from London Heathrow on Thu, 1 May, arriving in San Diego International.Inbound indirect flight with Austrian Airlines, departs from San Diego International on Fri, 9 May, arriving in London Heathrow.Price includes taxes and charges.From $849, select.
San Diego.$993 per passenger.Departing Mon, 23 Jun, returning Sun, 13 Jul.Return flight with Brussels Airlines.Outbound indirect flight with Brussels Airlines, departs from London Heathrow on Mon, 23 Jun, arriving in San Diego International.Inbound indirect flight with Brussels Airlines, departs from San Diego International on Sun, 13 Jul, arriving in London Heathrow.Price includes taxes and charges.From $993, select.
San Diego.$1,043 per passenger.Departing Wed, 30 Apr, returning Mon, 5 May.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Wed, 30 Apr, arriving in San Diego International.Inbound indirect flight with Air Canada, departs from San Diego International on Mon, 5 May, arriving in London Heathrow.Price includes taxes and charges.From $1,043, select.
San Diego.$1,046 per passenger.Departing Wed, 7 Jan, returning Wed, 21 Jan.Return flight with Lufthansa and Austrian Airlines.Outbound indirect flight with Lufthansa, departs from London Heathrow on Wed, 7 Jan, arriving in San Diego International.Inbound indirect flight with Austrian Airlines, departs from San Diego International on Wed, 21 Jan, arriving in London Heathrow.Price includes taxes and charges.From $1,046, select.
San Diego.$1,050 per passenger.Departing Wed, 10 Sep, returning Wed, 24 Sep.Return flight with Lufthansa and Austrian Airlines.Outbound indirect flight with Lufthansa, departs from London Heathrow on Wed, 10 Sep, arriving in San Diego International.Inbound indirect flight with Austrian Airlines, departs from San Diego International on Wed, 24 Sep, arriving in London Heathrow.Price includes taxes and charges.From $1,050, select.
San Diego.$1,051 per passenger.Departing Wed, 23 Apr, returning Sun, 27 Apr.Return flight with United.Outbound indirect flight with United, departs from London Heathrow on Wed, 23 Apr, arriving in San Diego International.Inbound indirect flight with United, departs from San Diego International on Sun, 27 Apr, arriving in London Heathrow.Price includes taxes and charges.From $1,051, select.
San Diego.$1,052 per passenger.Departing Wed, 14 May, returning Wed, 24 Sep.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from London Heathrow on Wed, 14 May, arriving in San Diego International.Inbound indirect flight with Lufthansa, departs from San Diego International on Wed, 24 Sep, arriving in London Heathrow.Price includes taxes and charges.From $1,052, select.
San Diego.$1,053 per passenger.Departing Mon, 2 Feb, returning Mon, 9 Feb.Return flight with Lufthansa and Austrian Airlines.Outbound indirect flight with Lufthansa, departs from London Heathrow on Mon, 2 Feb, arriving in San Diego International.Inbound indirect flight with Austrian Airlines, departs from San Diego International on Mon, 9 Feb, arriving in London Heathrow.Price includes taxes and charges.From $1,053, select.

Find the cheapest month to fly from London Heathrow to San Diego International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London Heathrow to San Diego International flights are currently cheapest in May.
Mar
from $1,108
Apr
from $1,051
May
from $849
Jun
from $1,203
Jul
from $1,245
Aug
from $1,775
Sep
from $1,050
Oct
from $1,218
Nov
from $1,053
Dec
from $1,116
Jan
from $1,046
Feb
from $1,053

Direct flights from London Heathrow to San Diego International

London Heathrow to San Diego International: Alternative routes

Compare routes from London Heathrow to San Diego below. You may find an airport to fly into that's cheaper, faster, or easier than San Diego International.

London to San Diego: Flight information

The things to know before you go.
Cheapest flight found$849
Cheapest month to flyMay
Average flight time11 hrs, 13 mins
Most popular airlineAlaska Airlines
Average flights per week62

Finding cheap flights from London Heathrow to San Diego International: Frequently asked questions

The best price we found for a return flight from London Heathrow to San Diego International is $849. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
11 hours and 13 minutes is the average flight time from London Heathrow to San Diego International.
Alaska Airlines, American Airlines and British Airways fly direct from London Heathrow to San Diego International.
As of March 2025, there are 62 flights per week flying from London Heathrow to San Diego International.
The cheapest month to fly from London Heathrow to San Diego International is usually March 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Heathrow Airport to San Diego International Airport on Thursday, 1 May 2025.
Yes – the average flight time is 11 hours and 13 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Diego International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Diego is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Austrian Airlines and British Airways offer the cheapest flight tickets to San Diego International.

Flying from London Heathrow Airport (LHR) to San Diego International Airport (SAN): what you need to know

  • 11 hours 10 minutes is the average length of a direct flight from London Heathrow Airport to San Diego International Airport. San Diego is 7 hours behind London and operates on the UTC-7 timezone.

  • Take your pick of 17 weekly flights from London Heathrow Airport to San Diego International Airport. The 12:15 departure with British Airways is the earliest you can take from LHR to SAN. British Airways operates the last service of the day at 20:40.

  • If you're jetting off during a major holiday or other peak period, give yourself more time. A good general rule is two hours ahead of domestic flights and up to four hours before international departures. Security and check-in lines will be longer.

  • If you want to break up your flight from London Heathrow Airport to San Diego International Airport, think about adding a stopover. Simply deselect 'Direct flights only' to find a city that interests you. The most popular stopovers on the LHR - SAN route include:

    • Phoenix Sky Harbour International Airport

    • Denver International Airport

    • Harry Reid Airport (formerly McCarran Airport)

How to find the cheapest flights from London Heathrow Airport (LHR) to San Diego International Airport (SAN)

  • $685 is the best price for a one-way ticket from London Heathrow Airport to San Diego International Airport. A return flight starts at $849. These prices may change based on availability and demand.

  • Book 9 months before you want to fly. After looking at the numbers on our calendar, this is how far you should book ahead to secure flight tickets from LHR to SAN.

  • May is the cheapest month for tickets from London Heathrow Airport to San Diego International Airport. If you're looking to fly at a different time of year, the 'Whole month' tool will give you the lowest prices for each month.

  • Log into your online account or use the app to create a Price Alert. We'll notify you right away if there's a better deal on this route. It doesn't take long, and it'll save you from looking for flight tickets from LHR to SAN every day.

  • Take advantage of filters to find the ideal trip for you. To see the 'Fastest,' 'Best' or 'Cheapest' flights from London Heathrow Airport to San Diego International Airport, use the 'Sort by' tool. You can also filter by airline, arrival and departure times, and journey duration.

Handy information about London Heathrow Airport (LHR)

  • The journey from central London to London Heathrow Airport takes about 1 hour and 1 minute on public transport. If you drive, ride-share or take a cab, you'll cover the 31 kilometres in 57 minutes or so, depending on traffic.

  • After a hassle-free start to your travels? Stay near LHR. Whether you're catching an early flight from London Heathrow Airport to San Diego International Airport or just don't like being rushed, these stays are the answer:

Arriving at San Diego International Airport (SAN)

Getting from San Diego International Airport (SAN) to central San Diego

  • San Diego International Airport is approximately 5 kilometres from central San Diego. With a car rental or if you're catching a cab, the drive is around 9 minutes.

  • Travelling to the centre by public transport takes around 20 minutes.

When to fly to San Diego International Airport (SAN)

  • It's time to pick your travel dates for your flight from London Heathrow Airport to San Diego International Airport. July is the busiest month to visit San Diego. If you want a more relaxed vibe, go in May.

  • The warmest month in San Diego is August, with the temperature ranging between 17 ºC and 28 ºC. Lock in your flights from London Heathrow Airport to San Diego International Airport in this month if this is the type of weather you enjoy.

  • If you'd rather travel in cooler conditions, look for a cheap ticket from LHR to SAN in February. Average temperatures are between 7 ºC and 23 ºC then.

More about San Diego

  • After booking your flights from LHR to SAN, you'll need to find a hotel in San Diego. Make one of these accommodation options your base for exploring this exciting destination:

  • Every great journey has to include a little sightseeing. San Diego Zoo, USS Midway Museum and SeaWorld San Diego are must-do's during your San Diego adventure.

Complete your San Diego trip with hotels and a car rental

  • Comparing flights is not the only thing we do. Once you've secured your cheap ticket to San Diego International Airport, browse our great car rental deals that'll give you the freedom and flexibility to see the sights at your own pace. Then, have a look at our exclusive rates for hotels to find your ideal San Diego stay.

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Plan the rest of your trip from London to San Diego

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.