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Cheap Flights from San Diego to London Heathrow

Compare San Diego to London Heathrow flight deals

Find the cheapest month or even day of the year to fly to London Heathrow

Book the best London Heathrow fare with no extra fees

Flight deals from San Diego to London Heathrow

Looking for a cheap last-minute deal or the best return flight from San Diego to London Heathrow? Find the lowest prices on one-way and return tickets right here.
London.R 4,572 per passenger.Departing Fri, 24 Oct.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from San Diego International on Fri, 24 Oct, arriving in London Heathrow.Price includes taxes and charges.From R 4,572, select.
London.R 4,722 per passenger.Departing Wed, 3 Dec.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from San Diego International on Wed, 3 Dec, arriving in London Heathrow.Price includes taxes and charges.From R 4,722, select.
London.R 4,722 per passenger.Departing Wed, 26 Nov.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from San Diego International on Wed, 26 Nov, arriving in London Heathrow.Price includes taxes and charges.From R 4,722, select.
London.R 4,886 per passenger.Departing Sat, 20 Sep.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from San Diego International on Sat, 20 Sep, arriving in London Heathrow.Price includes taxes and charges.From R 4,886, select.
London.R 5,086 per passenger.Departing Sat, 17 Jan.One-way flight with Hawaiian Airlines.Outbound indirect flight with Hawaiian Airlines, departs from San Diego International on Sat, 17 Jan, arriving in London Heathrow.Price includes taxes and charges.From R 5,086, select.
London.R 5,200 per passenger.Departing Sun, 15 Mar.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from San Diego International on Sun, 15 Mar, arriving in London Heathrow.Price includes taxes and charges.From R 5,200, select.
London.R 5,200 per passenger.Departing Mon, 2 Feb.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from San Diego International on Mon, 2 Feb, arriving in London Heathrow.Price includes taxes and charges.From R 5,200, select.
London.R 7,080 per passenger.Departing Tue, 5 May.One-way flight with KLM.Outbound indirect flight with KLM, departs from San Diego International on Tue, 5 May, arriving in London Heathrow.Price includes taxes and charges.From R 7,080, select.

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

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Diego to London Heathrow flights are currently cheapest in October.
Aug
from R 9,239
Sep
from R 4,886
Oct
from R 4,572
Nov
from R 4,722
Dec
from R 4,722
Jan
from R 5,086
Feb
from R 5,200
Mar
from R 5,200
Apr
from R 7,544
May
from R 7,080
Jun
from R 7,905
Jul
from R 8,416

Direct flights from San Diego to London Heathrow

San Diego to London Heathrow: Alternative routes

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

San Diego to London: Flight information

The things to know before you go.
Cheapest flight foundR 4,572
Cheapest month to flyOctober
Average flight time10 hrs, 37 mins
Most popular airlineAlaska Airlines
Average flights per week116

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

The best price we found for a return flight from San Diego to London Heathrow is R 9,545. 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.
10 hours and 37 minutes is the average flight time from San Diego to London Heathrow.
Alaska Airlines, American Airlines and British Airways fly direct from San Diego to London Heathrow.
As of August 2025, there are 58 flights per week flying from San Diego to London Heathrow.
The cheapest month to fly from San Diego to London Heathrow is usually September.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from San Diego to London Heathrow Airport on Wednesday, 10 September 2025.
Yes – the average flight time is 10 hours and 37 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 London Heathrow 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 London is around 40 days in advance, so don’t leave your flight to the last minute.

Flying from San Diego to London Heathrow Airport (LHR): What you need to know

  • San Diego International Airport (SAN) is San Diego's main airport. Check out your options for reserving a flight from San Diego to London Heathrow Airport (LHR) taking off from here.

  • Jump on a direct San Diego to London Heathrow Airport flight and you'll be in the air for an average of 10 hours 35 minutes.

  • The timezone in London is UTC+0, which is seven hours ahead of San Diego. London Heathrow Airport is located in London.

  • San Diego International Airport (SAN) to London Heathrow Airport (LHR) is the most popular route, with 10 direct services every week. You can get from SAN to LHR on British Airways's 4:40pm flight.

  • To ensure you get on your flight from San Diego to LHR, leave enough time for things like check-in and baggage drop. Arriving two hours before international departures and an hour before domestic flights is the standard rule.

  • Longer lines at security and check-in are likely if you're flying during high season, so allow some extra breathing space. The recommendation for peak periods? Get there up to four hours early for international flights and two hours for domestic departures.

Airports in San Diego

San Diego International Airport (SAN)

  • San Diego International Airport (SAN) provides a hassle-free way to reach your destination. Nonstop flights from San Diego to London Heathrow Airport (LHR) operate out of this terminal.

  • You can book a direct flight from San Diego to London Heathrow Airport with British Airways. This leading airline operates departures from SAN.

  • The airline with the highest booking numbers between SAN and LHR is British Airways.

  • The carrier with the most consistent on-time arrival rate on this route is British Airways.

  • Consider adding a stopover to find cheap flights from San Diego to LHR. Simply deselect 'Direct flights only' when browsing departures from San Diego International Airport (SAN). Break up the journey at one of these airports:

    • Denver International Airport (DEN)

    • Los Angeles International Airport (LAX)

    • Harry Reid Airport (formerly McCarran Airport) (LAS)

  • Located around 5 kilometres from the centre of San Diego, SAN can be reached in about 10 minutes by car, depending on traffic. The journey by public transport will take roughly 20 minutes.

  • Want a hassle-free start to your break? Stay near San Diego International Airport. Whether you're catching an early flight from San Diego to London Heathrow Airport or aren't a fan of being rushed, these hotels are the ideal choice:

  • When it comes to San Diego International Airport's on-time performance, data shows 71.38% of flights meet their scheduled arrival time.

  • You'll find SAN at N Harbour Dr.

McClellan-Palomar Airport (CLD)

  • CLD is about 56 kilometres from central San Diego. It takes 40 minutes or so to get to the airport by car from the city centre. Public transport takes roughly 2 hours 15 minutes.

  • Get a head start on your holiday with an additional night away from home. Before catching your San Diego to LHR flight, stay in one of these hotels close to McClellan-Palomar Airport:

About London Heathrow Airport (LHR)

Getting from London Heathrow Airport (LHR) to central London

  • The centre of London is about 26 kilometres from London Heathrow Airport. Journey times by car hire or cab will vary based on time of day and traffic conditions, so do some research ahead of your trip.

  • It takes around 1 hour to get there using public transport.

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

  • The lowest price we've found for a one-way ticket from San Diego to London Heathrow Airport is R 4,572. For a return flight on this route, the best price is R 9,545. Depending on the availability when you book, these fares can change.

  • Booking ahead of time is often the key to finding a cheap flight from San Diego to LHR. Flight prices rise as demand increases, so the closer you get to departure, the more expensive your ticket may be.

  • The 'Whole month' search tool will show you the cheapest San Diego to London Heathrow Airport tickets across every month. It's an easy way to find a bargain if your trip dates are flexible.

  • There's no need to check every day to find out if fares have dropped when you set up a Price Alert. We'll notify you when a lower fare pops up on plane tickets from San Diego to LHR.

  • Filters make it easier to save some cash on your flight from San Diego to London Heathrow Airport. Pick the departure times, airlines and number of stops that look good to you. Then sort the results by 'Cheapest' to find the lowest price right away.

The best time to fly from San Diego to London Heathrow Airport (LHR)

  • July is the most popular month for flights from San Diego to London Heathrow Airport (LHR). Plan your visit to London in February if you'd rather avoid peak season.

  • When booking your San Diego to LHR plane ticket, consider what kind of weather you prefer. July is the warmest month in London, with temperatures ranging from 11ºC (52ºF) to 26ºC (79ºF).

  • Search for cheap tickets from San Diego to London Heathrow Airport in January if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between 0ºC (32ºF) and 9ºC (48ºF).

More about London

  • When it comes to looking for somewhere to lay your head, you'll find the top stays in London right here. Browse these options as soon as you've booked your flight from San Diego to London Heathrow Airport:

  • The British Museum and Westminster Abbey are a couple of big attractions to put on your London travel itinerary. Keep the adventure rolling by checking out Big Ben.

Explore more of the United Kingdom

  • You've seen London, now it's time to discover other parts of the United Kingdom. Journey around 153 kilometres north-west to Birmingham to tick off its leading attractions. From The Windsor Castle to Birmingham Museum & Art Gallery and Birmingham Hippodrome Theatre, you'll have a full itinerary ahead.

  • Around 145 kilometres west of London, Bristol is another essential stop in the United Kingdom. Start your sightseeing at Banksey, Banksy's You Don't Need Planning Permission to Build Castles in the Sky and Clifton Suspension Bridge.

Plan the rest of your trip from San Diego to London

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