687 € Cheap Flights from San Diego to London Heathrow

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

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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 Airport? If you want to travel next month, return fares start from 743 €. Find the lowest prices on one-way and return tickets right here.

London.687 € per passenger.Departing Sat, 24 Oct, returning Mon, 16 Nov.Return flight with Alaska Airlines and Aer Lingus.Outbound indirect flight with Alaska Airlines, departs from San Diego International on Sat, 24 Oct, arriving in London Heathrow.Inbound indirect flight with Aer Lingus, departs from London Heathrow on Mon, 16 Nov, arriving in San Diego International.Price includes taxes and charges.From 687 €, select.

London.691 € per passenger.Departing Sun, 18 Oct, returning Wed, 21 Oct.Return flight with WestJet and LEVEL.Outbound indirect flight with WestJet, departs from San Diego International on Sun, 18 Oct, arriving in London Heathrow.Inbound indirect flight with LEVEL, departs from London Heathrow on Wed, 21 Oct, arriving in San Diego International.Price includes taxes and charges.From 691 €, select.

London.694 € per passenger.Departing Mon, 9 Nov, returning Mon, 16 Nov.Return flight with Alaska Airlines and Aer Lingus.Outbound indirect flight with Alaska Airlines, departs from San Diego International on Mon, 9 Nov, arriving in London Heathrow.Inbound indirect flight with Aer Lingus, departs from London Heathrow on Mon, 16 Nov, arriving in San Diego International.Price includes taxes and charges.From 694 €, select.

London.703 € per passenger.Departing Tue, 22 Sep, returning Tue, 6 Oct.Return flight with Frontier Airlines and TAP Air Portugal.Outbound indirect flight with Frontier Airlines, departs from San Diego International on Tue, 22 Sep, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departs from London Heathrow on Tue, 6 Oct, arriving in San Diego International.Price includes taxes and charges.From 703 €, select.

London.708 € per passenger.Departing Tue, 25 Aug, returning Tue, 8 Sep.Return flight with jetBlue and Vueling Airlines.Outbound indirect flight with jetBlue, departs from San Diego International on Tue, 25 Aug, arriving in London Heathrow.Inbound indirect flight with Vueling Airlines, departs from London Heathrow on Tue, 8 Sep, arriving in San Diego International.Price includes taxes and charges.From 708 €, select.

London.725 € per passenger.Departing Sun, 29 Nov, returning Sun, 6 Dec.Return flight with WestJet and Vueling Airlines.Outbound indirect flight with WestJet, departs from San Diego International on Sun, 29 Nov, arriving in London Heathrow.Inbound indirect flight with Vueling Airlines, departs from London Heathrow on Sun, 6 Dec, arriving in San Diego International.Price includes taxes and charges.From 725 €, select.

London.729 € per passenger.Departing Wed, 16 Sep, returning Mon, 21 Sep.Return flight with Alaska Airlines and TAP Air Portugal.Outbound indirect flight with Alaska Airlines, departs from San Diego International on Wed, 16 Sep, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departs from London Heathrow on Mon, 21 Sep, arriving in San Diego International.Price includes taxes and charges.From 729 €, select.

London.733 € per passenger.Departing Tue, 26 Jan, returning Tue, 9 Feb.Return flight with Alaska Airlines and Aer Lingus.Outbound indirect flight with Alaska Airlines, departs from San Diego International on Tue, 26 Jan, arriving in London Heathrow.Inbound indirect flight with Aer Lingus, departs from London Heathrow on Tue, 9 Feb, arriving in San Diego International.Price includes taxes and charges.From 733 €, select.

London.736 € per passenger.Departing Mon, 10 May, returning Fri, 21 May.Return flight with Lufthansa and Aer Lingus.Outbound indirect flight with Lufthansa, departs from San Diego International on Mon, 10 May, arriving in London Heathrow.Inbound indirect flight with Aer Lingus, departs from London Heathrow on Fri, 21 May, arriving in San Diego International.Price includes taxes and charges.From 736 €, select.

London.739 € per passenger.Departing Mon, 11 Jan, returning Fri, 22 Jan.Return flight with Alaska Airlines and Vueling Airlines.Outbound indirect flight with Alaska Airlines, departs from San Diego International on Mon, 11 Jan, arriving in London Heathrow.Inbound indirect flight with Vueling Airlines, departs from London Heathrow on Fri, 22 Jan, arriving in San Diego International.Price includes taxes and charges.From 739 €, select.

London.743 € per passenger.Departing Sat, 15 Aug, returning Tue, 25 Aug.Return flight with jetBlue and Aer Lingus.Outbound indirect flight with jetBlue, departs from San Diego International on Sat, 15 Aug, arriving in London Heathrow.Inbound indirect flight with Aer Lingus, departs from London Heathrow on Tue, 25 Aug, arriving in San Diego International.Price includes taxes and charges.From 743 €, select.

London.745 € per passenger.Departing Mon, 1 Feb, returning Sat, 6 Feb.Return flight with Alaska Airlines and Aer Lingus.Outbound indirect flight with Alaska Airlines, departs from San Diego International on Mon, 1 Feb, arriving in London Heathrow.Inbound indirect flight with Aer Lingus, departs from London Heathrow on Sat, 6 Feb, arriving in San Diego International.Price includes taxes and charges.From 745 €, select.

London.751 € per passenger.Departing Tue, 1 Dec, returning Mon, 7 Dec.Return flight with Air Canada and Lufthansa.Outbound indirect flight with Air Canada, departs from San Diego International on Tue, 1 Dec, arriving in London Heathrow.Inbound indirect flight with Lufthansa, departs from London Heathrow on Mon, 7 Dec, arriving in San Diego International.Price includes taxes and charges.From 751 €, select.

London.759 € per passenger.Departing Wed, 10 Feb, returning Wed, 3 Mar.Return flight with United.Outbound indirect flight with United, departs from San Diego International on Wed, 10 Feb, arriving in London Heathrow.Inbound indirect flight with United, departs from London Heathrow on Wed, 3 Mar, arriving in San Diego International.Price includes taxes and charges.From 759 €, select.

London.760 € per passenger.Departing Tue, 29 Dec, returning Fri, 15 Jan.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from San Diego International on Tue, 29 Dec, arriving in London Heathrow.Inbound indirect flight with Lufthansa, departs from London Heathrow on Fri, 15 Jan, arriving in San Diego International.Price includes taxes and charges.From 760 €, select.

London.763 € per passenger.Departing Mon, 22 Mar, returning Wed, 31 Mar.Return flight with United.Outbound indirect flight with United, departs from San Diego International on Mon, 22 Mar, arriving in London Heathrow.Inbound indirect flight with United, departs from London Heathrow on Wed, 31 Mar, arriving in San Diego International.Price includes taxes and charges.From 763 €, 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.

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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 found	687 €
Cheapest month to fly	October
Average flight time	10 hrs, 42 mins
Most popular airline	Alaska Airlines
Average flights per week	59

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

How much are return flights from San Diego to London Heathrow?

The best price we found for a return flight from San Diego to London Heathrow is 687 €. 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.

How long does it take to fly from San Diego to London Heathrow?

10 hours and 42 minutes is the average flight time from San Diego to London Heathrow.

Which airlines fly direct from San Diego to London Heathrow?

Alaska Airlines, American Airlines and British Airways fly direct from San Diego to London Heathrow.

How many flights are there a week from San Diego to London Heathrow?

As of July 2026, there are 118 flights per week flying from San Diego to London Heathrow.

When is the cheapest time to fly from San Diego to London Heathrow?

The cheapest month to fly from San Diego to London Heathrow is usually October.

Which upcoming date is cheapest to fly from San Diego to London Heathrow Airport on?

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 Saturday, 24 October 2026.

Can I get a direct flight from San Diego to London Heathrow Airport?

Yes – the average flight time is 10 hours and 42 minutes.

How can I find the best flight deal to London Heathrow?

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.

When is the best time to book flights to London?

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.

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

San Diego International Airport (SAN) is San Diego's main airport. Explore your options for booking a flight from San Diego to London Heathrow Airport (LHR) taking off from here.
Around 10 hours 40 minutes is how long you'll be travelling on a direct San Diego to London Heathrow Airport flight.
London Heathrow Airport is located in London. The city operates on the UTC+0 timezone and is eight hours ahead of San Diego.
San Diego International Airport (SAN) to London Heathrow Airport (LHR) is the most popular route. There are 11 direct flights a week to pick from. If you prefer a later start to the day, hop on the last flight with British Airways at 7:50pm. Opt for the first SAN to LHR departure operated by British Airways at 4:40pm if you'd rather not wait around.
To ensure you catch your flight from San Diego to LHR, leave enough time to check in and find your gate. Arriving two hours before international departures and one hour before domestic flights is the general rule.
Popular months like July or high seasons such as spring break and Christmas will mean bigger queues at check-in and security. Be on the safe side and head to the airport even earlier. Arriving two hours before a domestic flight and up four hours ahead of an international flight is a smart move.

Airports in San Diego

San Diego International Airport (SAN)

San Diego International Airport (SAN) will have you travelling directly to your destination. Nonstop flights from San Diego to London Heathrow Airport (LHR) leave from this terminal.
British Airways is a well-known airline that offers direct flights from San Diego to London Heathrow Airport jetting out of SAN.
The majority of travellers choose to book seats with British Airways between SAN and LHR.
With 69.7% of its services landing as planned, British Airways is the best performing carrier for punctuality on this route.
We make it a breeze to find cheap flights from San Diego to LHR that include a stopover. To explore your options leaving from San Diego International Airport (SAN), deselect 'Direct flights only.' Then, simply choose a flight offering a stop long enough to tour the city of your choice. Top stopovers between SAN and LHR include:
- Denver International Airport (DEN)
- Los Angeles International Airport (LAX)
- Las Vegas Harry Reid International Airport (LAS)
Travelling from central San Diego to SAN takes around 25 minutes on public transport. If you drive, ride-share or take a taxi, you'll cover the 5 kilometres in 15 minutes or so, depending on traffic.
Have an early flight from San Diego to London Heathrow Airport? Avoid the last-minute rush to the terminal (and enjoy a few extra z's) by picking one of these stays close to San Diego International Airport:
Of the flights that depart from San Diego International Airport, 74% land on time at their destination.
SAN's address is N Harbour Dr.

McClellan-Palomar Airport (CLD)

CLD is approximately 48 kilometres from central San Diego. Plan ahead to work out the easiest way to get to the terminal.
Want to enjoy an extra night away before your San Diego to LHR flight? Unwind in a hotel near McClellan-Palomar Airport before your holiday officially starts. These stays have a room with your name on it:
Flights from McClellan-Palomar Airport are known for their punctuality, with 88% of them arriving right on cue.

About London Heathrow Airport (LHR)

Have a late flight from San Diego to London Heathrow Airport? Don't let it leave you bleary-eyed. Stay at one of these hotels near LHR and be in snooze mode sooner:
Secure the lowest price by reserving your ride around one week before your San Diego to London Heathrow Airport flight.

Getting from London Heathrow Airport (LHR) to central London

London Heathrow Airport is around 24 kilometres from the centre of London. It takes around 45 minutes or so to get to the city by car.
Travelling by public transport typically takes 25 minutes.

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

244 € is the lowest price for a one-way ticket from San Diego to London Heathrow Airport. Return flights start from 687 €. These prices can change depending on availability and demand.
Don't leave things to the last moment. You're more likely to find cheap flights from San Diego to LHR if you book early. Airlines often have some fantastic early bird rates.
The 'Whole month' search tool will show you the cheapest San Diego to London Heathrow Airport tickets across every month. It's a good way to find a bargain if your dates aren't set in stone.
Locking in a cheap plane ticket from San Diego to LHR is a breeze with Price Alerts. Simply create one of these automatic alerts and we'll notify you as soon as there's a better deal.
Save on your flight from San Diego to London Heathrow Airport by using filters. Select your preferred duration, number of stops and airlines, then sort the results by 'Cheapest' for the best deals.

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

January is the quietest month for flights from San Diego to London Heathrow Airport (LHR), while July is the most popular. Figure out the ideal time to visit London based on whether you want a lively atmosphere or a more laid-back vibe.
Book a San Diego to LHR plane ticket departing in July if you want to experience the city during its warmest month. Expect temperatures in London to range from 11ºC (52ºF) to 26ºC (79ºF).
Look for cheap tickets from San Diego to London Heathrow Airport in January if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between 0ºC (32ºF) and 9ºC (48ºF).

More about London

Start your London trip right by choosing the ideal place to stay. Once you've booked your flight from San Diego to London Heathrow Airport, browse our selection of hotels including:
The British Museum and Westminster Abbey are just a couple of the top attractions to put on your London travel itinerary. Keep the momentum going by heading to Big Ben.

Explore more of the United Kingdom

Manchester is just one of the many places in the United Kingdom waiting to be discovered after you've seen London. Around 257 kilometres away to the northwest, its best attractions include Manchester United Museum & Stadium Tour, The Homes of Football and Museum of Science and Industry.
If you're eager to discover another side of the United Kingdom, head for Birmingham, about 153 kilometres northwest of London. Birmingham Museum & Art Gallery, Birmingham Hippodrome Theatre and Bournville Experience are key reasons to visit.