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Cheap flights from London Heathrow to San Diego

Travelers and cabin class

Compare London Heathrow to San Diego flight deals

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

Book the best San Diego fare with no extra fees

Flight deals from London Heathrow to San Diego

Looking for a cheap last-minute deal or the best round-trip flight from London Heathrow to San Diego? Find the lowest prices on one-way and round-trip tickets right here.
San Diego.C$697 per passenger.Departing Fri, Jan 30, returning Sun, Feb 8.Round-trip flight with Austrian Airlines.Outbound indirect flight with Austrian Airlines, departing from London Heathrow on Fri, Jan 30, arriving in San Diego International.Inbound indirect flight with Austrian Airlines, departing from San Diego International on Sun, Feb 8, arriving in London Heathrow.Price includes taxes and charges.From C$697, select.
San Diego.C$855 per passenger.Departing Tue, May 13, returning Tue, May 20.Round-trip flight with Air Canada.Outbound indirect flight with Air Canada, departing from London Heathrow on Tue, May 13, arriving in San Diego International.Inbound indirect flight with Air Canada, departing from San Diego International on Tue, May 20, arriving in London Heathrow.Price includes taxes and charges.From C$855, select.
San Diego.C$859 per passenger.Departing Mon, Apr 28, returning Mon, May 12.Round-trip flight with Lufthansa.Outbound indirect flight with Lufthansa, departing from London Heathrow on Mon, Apr 28, arriving in San Diego International.Inbound indirect flight with Lufthansa, departing from San Diego International on Mon, May 12, arriving in London Heathrow.Price includes taxes and charges.From C$859, select.
San Diego.C$859 per passenger.Departing Mon, Dec 1, returning Wed, Dec 10.Round-trip flight with Lufthansa and Austrian Airlines.Outbound indirect flight with Lufthansa, departing from London Heathrow on Mon, Dec 1, arriving in San Diego International.Inbound indirect flight with Austrian Airlines, departing from San Diego International on Wed, Dec 10, arriving in London Heathrow.Price includes taxes and charges.From C$859, select.
San Diego.C$859 per passenger.Departing Wed, Nov 19, returning Wed, Dec 3.Round-trip flight with Lufthansa and Austrian Airlines.Outbound indirect flight with Lufthansa, departing from London Heathrow on Wed, Nov 19, arriving in San Diego International.Inbound indirect flight with Austrian Airlines, departing from San Diego International on Wed, Dec 3, arriving in London Heathrow.Price includes taxes and charges.From C$859, select.
San Diego.C$860 per passenger.Departing Wed, Sep 10, returning Tue, Sep 16.Round-trip flight with Lufthansa and Austrian Airlines.Outbound indirect flight with Lufthansa, departing from London Heathrow on Wed, Sep 10, arriving in San Diego International.Inbound indirect flight with Austrian Airlines, departing from San Diego International on Tue, Sep 16, arriving in London Heathrow.Price includes taxes and charges.From C$860, select.
San Diego.C$860 per passenger.Departing Mon, Feb 16, returning Tue, Feb 24.Round-trip flight with United.Outbound indirect flight with United, departing from London Heathrow on Mon, Feb 16, arriving in San Diego International.Inbound indirect flight with United, departing from San Diego International on Tue, Feb 24, arriving in London Heathrow.Price includes taxes and charges.From C$860, select.
San Diego.C$860 per passenger.Departing Mon, Nov 17, returning Mon, Nov 24.Round-trip flight with Lufthansa and Austrian Airlines.Outbound indirect flight with Lufthansa, departing from London Heathrow on Mon, Nov 17, arriving in San Diego International.Inbound indirect flight with Austrian Airlines, departing from San Diego International on Mon, Nov 24, arriving in London Heathrow.Price includes taxes and charges.From C$860, select.

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

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 flights are currently cheapest in May.
Mar
from C$2,285
Apr
from C$861
May
from C$855
Jun
from C$951
Jul
from C$1,035
Aug
from C$1,385
Sep
from C$860
Oct
from C$1,045
Nov
from C$860
Dec
from C$859
Jan
from C$861
Feb
from C$860

Direct flights from London Heathrow to San Diego

Alternative London Heathrow to San Diego routes

Looking for the cheapest, fastest or easiest route from London Heathrow to San Diego? You could fly into the following airports instead.

London to San Diego: Flight information

The things to know before you go.
Cheapest flight foundC$697
Cheapest month to flyJanuary
Average flight time11 hrs, 13 mins
Most popular airlineAlaska Airlines
Average flights per week92

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

There are 2 airports in San Diego: San Diego International and McClellan – Palomar.
The best price we found for a round-trip flight from London Heathrow to San Diego is C$697. 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.
Alaska Airlines, American Airlines and British Airways fly direct from London Heathrow to San Diego.
There are 98 flights per week flying from London Heathrow to San Diego, as of March 2025.
The cheapest month to fly from London Heathrow to San Diego is usually March 2025.
If you're flying from London Heathrow Airport, the cheapest airport near San Diego is San Diego International – which is 4.1 km away from the center of San Diego. We've found flights to this airport from C$697.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Heathrow Airport to San Diego on Friday, January 30, 2026.
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 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.
In March, the average temperature is usually around 14°C. August is typically the warmest month in San Diego, when it usually averages around 28°C. You can expect the least rain in June. The coldest month is December, with temperatures averaging 10°C. The rainiest month is February.
Currently, Austrian Airlines and British Airways offer the cheapest flight tickets to San Diego.

How to find cheap flights to San Diego from London Heathrow

Looking for cheap tickets from London Heathrow to San Diego? Here are a few tips on how to secure the best flight price and make your journey as smooth as possible.

  • Simply hit "search." From Delta Air Lines to international carriers like Emirates, we compare all major airlines along with the most popular online travel agents to find the cheapest plane tickets from London Heathrow to San Diego. And with us, there are no hidden fees – what you see is what you pay.
  • Compare flight deals to San Diego from London Heathrow from over 1,000 providers. Then choose the cheapest plane tickets or fastest journeys.
  • Flex your dates to find the best London Heathrow–San Diego ticket prices. If you're flexible when it comes to your travel dates, use Skyscanner's "Whole month" tool to find the cheapest month, and even day to fly to San Diego from London Heathrow.
  • Set up a Price Alert. You can easily track the fare of your cheap London Heathrow–San Diego flights by creating an alert. Whenever prices go down or up, you'll get an email or push notification to help make sure you get the best possible flight deal.
  • Fly without stops. Only interested in direct flights between London Heathrow and San Diego? Make sure to tick "Direct flights only" when performing a search. If there are direct flights available on the route, these will appear in the results.
  • Find the cheapest Business Class flights from London Heathrow and San Diego. We scour the Internet for the best Business, Premium Economy and First Class flight fares to San Diego, too. Check the difference in price as you search – you might just stumble on a last-minute low fare. Note that not all cabin classes are available for every destination or airline.
  • Include nearby airports in your search. Widen your search for London Heathrow to San Diego flight deals by selecting the "add nearby airports" option. This will allow you to see flight prices for all the nearest airports at your departure point and your destination and could help you save the next time you travel.

    • Combine your flight to San Diego from London Heathrow with hotels and car rental

    Once you've secured your cheap flight ticket from London Heathrow to San Diego, discover the best prices and exclusive rates for hotels in San Diego or nearby. You can also compare hundreds of car rental companies at once so you get the best car rental price for your trip.


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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.