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Cheap Flights from San Diego International to London Heathrow

Compare San Diego International 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 International to London Heathrow

Looking for a cheap last-minute deal or the best return flight from San Diego International to London Heathrow? Find the lowest prices on one-way and return tickets right here.
London.R 4,818 per passenger.Departing Wed, 6 Aug.One-way flight with Spirit Airlines.Outbound indirect flight with Spirit Airlines, departs from San Diego International on Wed, 6 Aug, arriving in London Heathrow.Price includes taxes and charges.From R 4,818, select.
London.R 4,877 per passenger.Departing Mon, 17 Nov.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from San Diego International on Mon, 17 Nov, arriving in London Heathrow.Price includes taxes and charges.From R 4,877, select.
London.R 4,885 per passenger.Departing Sat, 11 Oct.One-way flight with Hawaiian Airlines.Outbound indirect flight with Hawaiian Airlines, departs from San Diego International on Sat, 11 Oct, arriving in London Heathrow.Price includes taxes and charges.From R 4,885, select.
London.R 4,939 per passenger.Departing Tue, 30 Sep.One-way flight with Hawaiian Airlines.Outbound indirect flight with Hawaiian Airlines, departs from San Diego International on Tue, 30 Sep, arriving in London Heathrow.Price includes taxes and charges.From R 4,939, select.
London.R 5,304 per passenger.Departing Mon, 8 Dec.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from San Diego International on Mon, 8 Dec, arriving in London Heathrow.Price includes taxes and charges.From R 5,304, select.
London.R 5,319 per passenger.Departing Wed, 25 Feb.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from San Diego International on Wed, 25 Feb, arriving in London Heathrow.Price includes taxes and charges.From R 5,319, select.
London.R 5,343 per passenger.Departing Wed, 4 Mar.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from San Diego International on Wed, 4 Mar, arriving in London Heathrow.Price includes taxes and charges.From R 5,343, select.
London.R 5,343 per passenger.Departing Wed, 14 Jan.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from San Diego International on Wed, 14 Jan, arriving in London Heathrow.Price includes taxes and charges.From R 5,343, select.

Find the cheapest month to fly from San Diego International 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 International to London Heathrow flights are currently cheapest in August.
Jul
from R 5,440
Aug
from R 4,818
Sep
from R 4,939
Oct
from R 4,885
Nov
from R 4,877
Dec
from R 5,304
Jan
from R 5,343
Feb
from R 5,319
Mar
from R 5,343
Apr
from R 7,719
May
from R 7,731
Jun
from R 9,837

Direct flights from San Diego International to London Heathrow

San Diego International to London Heathrow: Alternative routes

Compare routes from San Diego International 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 4,818
Cheapest month to flyAugust
Average flight time10 hrs, 37 mins
Most popular airlineAlaska Airlines
Average flights per week61

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

The best price we found for a return flight from San Diego International to London Heathrow is R 9,521. 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 International to London Heathrow.
Alaska Airlines, American Airlines and British Airways fly direct from San Diego International to London Heathrow.
As of July 2025, there are 51 flights per week flying from San Diego International to London Heathrow.
The cheapest month to fly from San Diego International to London Heathrow is usually November.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Diego International Airport to London Heathrow Airport on Wednesday, 12 November 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.
Currently, Air Canada and British Airways offer the cheapest flight tickets to London Heathrow.

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

  • Book a direct flight from San Diego International Airport to London Heathrow Airport and you'll be in the air for an average of 10 hours 25 minutes.

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

  • Every week, there are 16 San Diego International Airport to London Heathrow Airport flights. To get going as soon as possible, pick the 17:15 British Airways flight. If you'd rather make the most of your time before flying, the last departure is at 20:40 with British Airways.

  • To ensure you catch your SAN to LHR flight, allow plenty of time for things like baggage drop and finding your gate. Turning up two hours before international departures and one hour before domestic flights is the general rule.

  • Be prepared for longer lines in popular months such as July. Arriving up to four hours in advance for international flights and two hours for domestic departures is a smart move.

  • British Airways is your gateway to exploring London (and maybe even some other exciting corners of United Kingdom!). Check out the direct flights from San Diego International Airport to London Heathrow Airport offered by this popular carrier.

  • The majority of travellers choose to travel with British Airways on this route.

  • The carrier with the most consistent on-time arrival rate for SAN to LHR flights is British Airways.

  • Think about adding a stopover when booking your ticket from San Diego International Airport to London Heathrow Airport. Simply deselect 'Direct flights only' to break up your journey, or even explore someplace new along the way. Here are some options between SAN and LHR:

    • Harry Reid Airport (formerly McCarran Airport)

    • Denver International Airport

    • Los Angeles International Airport

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

  • The lowest price we've found for a one-way San Diego International Airport to London Heathrow Airport flight is R 4,818. A return plane ticket right now is R 9,521. Depending on the availability when you book, these fares can change.

  • Book six months before flying. After crunching the numbers on our calendar, this is how far you should book ahead to find cheap tickets from SAN to LHR.

  • Organise your trip for May. That's the cheapest month for flights from San Diego International Airport to London Heathrow Airport. If your travel dates are flexible, try out the 'Whole month' tool to find the cheapest price across every month.

  • Never miss a deal on cheap flights from SAN to LHR by setting up a Price Alert. You'll receive an email or push notification on the app when a lower fare becomes available.

  • Secure the right flight for you by using the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from San Diego International Airport to London Heathrow Airport, use the 'Sort by' tool. You can also filter by arrival and departure times, airline, and number of stops.

Handy information about San Diego International Airport (SAN)

  • SAN is located at Airport Drive.

  • 71.38% of flights that take off from San Diego International Airport reach their destination on schedule.

  • San Diego International Airport is around 5 kilometres from central San Diego. If you're ride-sharing, catching a cab or driving from the centre, it'll take 10 minutes or so to arrive, depending on the traffic.

  • Catching public transport? Expect a trip time of around 20 minutes.

  • Have an early flight from San Diego International Airport to London Heathrow Airport? Avoid the hassle of rushing to the terminal (and catch some extra z's) by picking one of these hotels close to SAN:

Arriving at London Heathrow Airport (LHR)

Getting from London Heathrow Airport (LHR) to central London

  • London Heathrow Airport is approximately 31 kilometres from the centre of London. The drive time takes about 55 minutes.

  • Getting to the centre on public transport takes about 1 hour.

When to fly to London Heathrow Airport (LHR)

  • The quietest month for a flight from San Diego International Airport to London Heathrow Airport is February, while July is the most popular. Choose the best time to visit London based on whether you prefer a faster pace or a more relaxed vibe.

  • When booking your flight from San Diego International Airport to London Heathrow Airport, consider the type of weather you enjoy. July is the warmest month in London, with temperatures ranging from 11ºC (52ºF) to 26ºC (79ºF).

  • If you like travelling in cooler conditions, look for a cheap ticket from SAN to LHR in January. Temperatures average between 0ºC (32ºF) and 9ºC (48ºF) then.

Explore more of United Kingdom

  • Birmingham is just one of the many cities in United Kingdom waiting to be discovered once you've seen London. Around 161 kilometres away to the north-west, top sights here include Cadbury World, The Library of Birmingham and National Sea Life Centre.

  • Around 177 kilometres west of London, Bristol is another essential stop in United Kingdom. Experience the best of this destination with a visit to Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park.

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.