Question 1

What are the cheapest airlines flying from San Diego to London Heathrow Airport round-trip?

Accepted Answer

Our cheapest airline available from San Diego to London Heathrow Airport is Air Canada. Our recent data shows that you can find tickets from as low as £488 on this airline. Additional options worth looking into are United Airlines and British Airways, starting at £489 and £490 round-trip. These flights start at 26% lower than the current average price 3 months from now.

Question 2

What are the cheapest airlines to fly from San Diego to London Heathrow Airport one-way?

Accepted Answer

To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at £333. United Airlines flights start at £341 while deals on Air Canada start at £345 one-way.

Question 3

How far ahead should I book a flight from San Diego to London Heathrow Airport?

Accepted Answer

The best time to book flights from San Diego to London Heathrow Airport is 34 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Question 4

What is the cheapest month to book a flight from San Diego to London Heathrow Airport?

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from San Diego to London Heathrow Airport (average of £112). Flying from San Diego to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 5

What is the cheapest day to fly from San Diego to London Heathrow Airport?

Accepted Answer

Travellers seeking maximum savings on their San Diego to London Heathrow Airport flight should consider departing on Monday afternoons when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Question 6

Weekly flight availability from San Diego to London Heathrow Airport

Accepted Answer

The most flights from SAN to LHR are scheduled on a Monday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

Question 7

E

Accepted Answer

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Question 8

E

Accepted Answer

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Question 9

What are the cheapest flights from San Diego to London Heathrow Airport?

Accepted Answer

While on average a flight from San Diego to London Heathrow Airport is generally £493, our data shows the cheapest flight currently is £300. When looking at the most popular route, (San Diego - London Heathrow), you can expect to pay £458 for that flight.

Question 10

What are the most reliable airlines from San Diego to London Heathrow Airport?

Accepted Answer

Consider American Airlines (82%), Alaska Airlines (82%) or British Airways (82%) when booking your flight. These represent the most reliable airlines when flying from San Diego to London Heathrow Airport.

Question 11

What is the cheapest day to fly round-trip from San Diego to London Heathrow Airport?

Accepted Answer

Travelers have found that booking a Sunday departure is the best way to save up to 76% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

Question 12

How far in advance should I book a flight from San Diego to London Heathrow Airport?

Accepted Answer

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 20 days in advance, which can save you up to 53% on flights from San Diego to London Heathrow Airport compared to booking the week you need them. Waiting 20 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £600. For sooner than that we have options available in the next 3 days from £752.

Question 13

What is the cheapest month to fly from San Diego to London Heathrow Airport?

Accepted Answer

February can be a great time to fly to London Heathrow Airport from San Diego with a flight ticket averaging about £636. Cheapflights users have found deals in the month of February for as cheap as £437. The most expensive prices can be found in the month of June.

Question 14

What is the cheapest time of day to fly from SAN to LHR?

Accepted Answer

It’s optimal to fly from San Diego to London Heathrow Airport in the morning. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight in the afternoon.

Question 15

What airport do you fly from for flights from San Diego to London Heathrow?

Accepted Answer

San Diego (SAN) is the airport you will fly out of if you book a flight from San Diego to London Heathrow. You should not have trouble finding flights to London Heathrow from San Diego; the airport handles an average of 6 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 1 airline has flights from the San Diego airport to London Heathrow. It is only a 2.6 mi journey to San Diego (SAN) from San Diego’s city center.

Question 16

Can I find deals for flights from San Diego to Heathrow that include hotel bookings?

Accepted Answer

Yes. In addition to deals on San Diego to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 17

How can I find direct flights from San Diego to Heathrow?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Heathrow.

Question 18

Can I find deals for business class flights from San Diego to Heathrow?

Accepted Answer

Yes. Cheapflights offers flight deals from San Diego to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 19

How does Cheapflights help users find flights from San Diego to Heathrow?

Accepted Answer

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Heathrow from San Diego today with Cheapflights!

Question 20

Why should you use Cheapflights to find cheap flight tickets from San Diego to Heathrow?

Accepted Answer

Cheapflights simply makes it quick and affordable to book flights from San Diego to Heathrow by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Question 21

Can Cheapflights find flights from San Diego to Heathrow with no change fees?

Accepted Answer

Yes, we can. To see specific flights from San Diego to Heathrow with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Question 22

Can Cheapflights notify me if prices for flights from San Diego to Heathrow become cheaper?

Accepted Answer

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Heathrow from San Diego today and book when prices fit your budget.

Round-trip from	£487
One-way from	£333
Popular in	June
Cheapest in	January
Average price	£901
Good round-trip deal	£426 or less
Good one-way deal	£340 or less

Cheap flights from San Diego to London Heathrow Airport from £333

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 22/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from San Diego to London Heathrow are usually found in January or February, booked 34 days in advance, depart on a Monday or Sunday and return on a Friday

Cheap flight deals from San Diego to Heathrow

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Find flight deals from San Diego to Heathrow

Cheapest flights from San Diego to HeathrowExplore the most affordable flight options available from San Diego to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 July 2025.

Explore the most affordable flight options available from San Diego to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 July 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Diego to London Heathrow Airport that are best for you.

Best time to book a flight from San Diego to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from San Diego with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from San Diego to London Heathrow Airport

How far ahead should I book a flight from San Diego to London Heathrow Airport?

Use this chart to determine the optimal time to book a return flight from San Diego to Heathrow. Price data was last updated on 27 June 2025.

What is the cheapest month to book a flight from San Diego to London Heathrow Airport?

What is the cheapest time of day to fly from SAN to LHR?

Find hourly flight availability from San Diego to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 July 2025.

Weekly flight availability from San Diego to London Heathrow Airport

Explore weekly flight availability from San Diego to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 2 July 2025.

Reviews of airlines servicing Heathrow

Read through reviews of airlines operating flights from San Diego to London Heathrow Airport, such as Delta, Alaska Airlines, andFinnair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from San Diego to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from San Diego to London Heathrow?

What are the cheapest airlines flying from San Diego to London Heathrow Airport round-trip?

What are the cheapest airlines to fly from San Diego to London Heathrow Airport one-way?

What are the most reliable airlines from San Diego to London Heathrow Airport?

What are the cheapest flights from San Diego to London Heathrow Airport?

Can I find deals for flights from San Diego to Heathrow that include hotel bookings?

How can I find direct flights from San Diego to Heathrow?

Can I find deals for business class flights from San Diego to Heathrow?

What is the cheapest month to book a flight from San Diego to London Heathrow Airport?

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Alternative routes for San Diego to Heathrow

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Top airline flying from San Diego to Heathrow

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How does Cheapflights help users find flights from San Diego to Heathrow?

Why should you use Cheapflights to find cheap flight tickets from San Diego to Heathrow?

Can Cheapflights find flights from San Diego to Heathrow with no change fees?

Can Cheapflights notify me if prices for flights from San Diego to Heathrow become cheaper?

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Cheapest flights from San Diego to Heathrow
Explore the most affordable flight options available from San Diego to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 July 2025.