Cheap Flights from San Juan to London

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Travellers and cabin class, 1 Adult, Economy

Compare San Juan to London flight deals

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

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Flight deals from San Juan to London

Looking for a cheap last-minute deal or the best return flight from San Juan to London? If you want to travel next month, return fares start from $1,155. Find the lowest prices on one-way and return tickets right here.

London.$1,156 per passenger.Departing Fri, 16 Oct, returning Wed, 21 Oct.Return flight with Iberia and Ryanair.Outbound indirect flight with Iberia, departs from San Juan Luis Munoz Marin on Fri, 16 Oct, arriving in London Stansted.Inbound indirect flight with Ryanair, departs from London Stansted on Wed, 21 Oct, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From $1,156, select.

London.$1,172 per passenger.Departing Tue, 17 Nov, returning Wed, 18 Nov.Return flight with United.Outbound indirect flight with United, departs from San Juan Luis Munoz Marin on Tue, 17 Nov, arriving in London Heathrow.Inbound indirect flight with United, departs from London Heathrow on Wed, 18 Nov, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From $1,172, select.

London.$1,176 per passenger.Departing Sun, 18 Oct, returning Tue, 3 Nov.Return flight with British Airways.Outbound indirect flight with British Airways, departs from San Juan Luis Munoz Marin on Sun, 18 Oct, arriving in London Heathrow.Inbound indirect flight with British Airways, departs from London Heathrow on Tue, 3 Nov, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From $1,176, select.

London.$1,230 per passenger.Departing Wed, 30 Sep, returning Tue, 6 Oct.Return flight with KLM.Outbound indirect flight with KLM, departs from San Juan Luis Munoz Marin on Wed, 30 Sep, arriving in London Heathrow.Inbound indirect flight with KLM, departs from London Heathrow on Tue, 6 Oct, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From $1,230, select.

London.$1,245 per passenger.Departing Wed, 3 Feb, returning Tue, 9 Feb.Return flight with Air France and KLM.Outbound indirect flight with Air France, departs from San Juan Luis Munoz Marin on Wed, 3 Feb, arriving in London Heathrow.Inbound indirect flight with KLM, departs from London Heathrow on Tue, 9 Feb, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From $1,245, select.

London.$1,327 per passenger.Departing Fri, 19 Feb, returning Fri, 5 Mar.Return flight with Air France and KLM.Outbound indirect flight with Air France, departs from San Juan Luis Munoz Marin on Fri, 19 Feb, arriving in London Heathrow.Inbound indirect flight with KLM, departs from London Heathrow on Fri, 5 Mar, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From $1,327, select.

London.$1,377 per passenger.Departing Fri, 25 Sep, returning Mon, 28 Sep.Return flight with United.Outbound indirect flight with United, departs from San Juan Luis Munoz Marin on Fri, 25 Sep, arriving in London Heathrow.Inbound indirect flight with United, departs from London Heathrow on Mon, 28 Sep, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From $1,377, select.

London.$1,382 per passenger.Departing Tue, 1 Dec, returning Thu, 10 Dec.Return flight with Iberia.Outbound indirect flight with Iberia, departs from San Juan Luis Munoz Marin on Tue, 1 Dec, arriving in London Gatwick.Inbound indirect flight with Iberia, departs from London Heathrow on Thu, 10 Dec, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From $1,382, select.

London.$1,387 per passenger.Departing Sat, 16 Jan, returning Sat, 23 Jan.Return flight with Iberia.Outbound indirect flight with Iberia, departs from San Juan Luis Munoz Marin on Sat, 16 Jan, arriving in London Gatwick.Inbound indirect flight with Iberia, departs from London Gatwick on Sat, 23 Jan, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From $1,387, select.

London.$1,404 per passenger.Departing Fri, 27 Nov, returning Sat, 5 Dec.Return flight with British Airways.Outbound indirect flight with British Airways, departs from San Juan Luis Munoz Marin on Fri, 27 Nov, arriving in London Heathrow.Inbound indirect flight with British Airways, departs from London Heathrow on Sat, 5 Dec, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From $1,404, select.

London.$1,406 per passenger.Departing Thu, 15 Apr, returning Mon, 19 Apr.Return flight with Iberia.Outbound indirect flight with Iberia, departs from San Juan Luis Munoz Marin on Thu, 15 Apr, arriving in London Heathrow.Inbound indirect flight with Iberia, departs from London Heathrow on Mon, 19 Apr, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From $1,406, select.

London.$1,413 per passenger.Departing Fri, 19 Mar, returning Sun, 28 Mar.Return flight with KLM.Outbound indirect flight with KLM, departs from San Juan Luis Munoz Marin on Fri, 19 Mar, arriving in London Heathrow.Inbound indirect flight with KLM, departs from London Heathrow on Sun, 28 Mar, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From $1,413, select.

London.$1,465 per passenger.Departing Tue, 29 Dec, returning Tue, 12 Jan.Return flight with United.Outbound indirect flight with United, departs from San Juan Luis Munoz Marin on Tue, 29 Dec, arriving in London Heathrow.Inbound indirect flight with United, departs from London Heathrow on Tue, 12 Jan, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From $1,465, select.

London.$1,470 per passenger.Departing Sat, 27 Mar, returning Sat, 10 Apr.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from San Juan Luis Munoz Marin on Sat, 27 Mar, arriving in London Heathrow.Inbound indirect flight with Air France, departs from London Heathrow on Sat, 10 Apr, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From $1,470, select.

London.$1,509 per passenger.Departing Fri, 23 Apr, returning Sat, 8 May.Return flight with Iberia and easyJet.Outbound indirect flight with Iberia, departs from San Juan Luis Munoz Marin on Fri, 23 Apr, arriving in London Gatwick.Inbound indirect flight with easyJet, departs from London Gatwick on Sat, 8 May, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From $1,509, select.

Find the cheapest month to fly from San Juan to London

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Juan to London flights are currently cheapest in October.

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Alternative San Juan to London routes

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

San Juan to London: Flight information

The things to know before you go.

Cheapest flight found	$1,156
Cheapest month to fly	October

Finding cheap flights from San Juan to London: Frequently asked questions

How many airports are there in London?

There are 6 airports in London: London City, London Heathrow, London Gatwick, London Luton, London Stansted, and London Southend.

How much are return flights from San Juan to London?

The best price we found for a return flight from San Juan to London is $1,156. 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.

Which airlines fly direct from San Juan to London?

Currently, there are no airlines that fly direct from San Juan to London. But we found flights with one or more stops from $1,155.

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

As of September 2026, there are no flights flying from San Juan to London.

When is the cheapest time to fly from San Juan to London?

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

Which is the cheapest airport to fly into in London?

If you're flying from San Juan, the cheapest airport near London is London Stansted – which is 48.7 km away from the centre of London. We've found flights into this airport from $1,156.

Which upcoming date is cheapest to fly from San Juan to London on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from San Juan to London on Friday, 16 October 2026.

Can I get a direct flight from San Juan to London?

No airlines currently offer direct flights between San Juan and London. Most routes have one or more stops.

How can I get the best flight deal from San Juan to London?

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 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.

What’s the weather like in London?

In September, the average temperature is usually around 16°C. July is typically the warmest month in London, when it usually averages around 23°C. You can expect the least rain in April. The coldest month is January, with temperatures averaging 2°C. The rainiest month is October.

Which is the cheapest airline to fly from San Juan to London with?

The cheapest airline that flies to London is Iberia .

Travelling from San Juan to London: what you need to know

San Juan's main base, San Juan Luis Munoz Marin Airport (SJU), is where many unforgettable trips begin. Explore your departure options from here for your flight from San Juan to London.
Land at London Heathrow Airport (LHR), London Gatwick Airport (LGW) or London Stansted Airport (STN). You can also disembark at London Luton Airport (LTN) and London City Airport (LCY) in London.
London's timezone is UTC+0, making London four hours ahead of San Juan.
To ensure you don't miss your San Juan to London flight, leave enough time to check in and drop off your luggage. Arriving two hours before international departures and one hour before domestic flights is the general rule to follow.
During popular months like July, it's a good idea to get to the airport well in advance. Arrive two hours before a domestic departure and four hours ahead for an international flight when you fly during peak periods in general.

How to find the cheapest flights from San Juan to London

Don't wait until the last minute. You're more likely to get cheap San Juan to London flights if you book in advance. Airlines often have some amazing early bird rates.
Getting cheap plane tickets from San Juan to London is easier if you're flexible with your trip dates. Try using the 'Whole month' tool to see the best prices across every month and pick up a fantastic deal.
You don't need to check back in every day to see if prices have dropped when you create a Price Alert. We'll let you know when there's a better deal on cheap flights from San Juan to London.
Choose your ideal arrival and departure times, airlines and number of stops by using the filters. Or sort your San Juan to London flight results by 'Best,' 'Fastest' or 'Cheapest.'

Flying from San Juan

San Juan Luis Munoz Marin Airport (SJU)

Stopovers are the ideal opportunity to take a break from travelling — and possibly even visit a new city. When browsing San Juan to London flights leaving from San Juan Luis Munoz Marin Airport, deselect the 'Direct flights only' box to see where you can stop along the way. Here are some options to consider:
- New York John F. Kennedy Airport (JFK)
- Madrid Airport (MAD)
- Boston Logan International Airport (BOS)
The journey from central San Juan to SJU takes about 1 hour on public transport. If you drive, ride-share or grab a taxi, you'll cover the 11 kilometres in 20 minutes or so, depending on traffic conditions.
Want a hassle-free start to your journey? Stay near San Juan Luis Munoz Marin Airport. Whether you're catching an early flight from San Juan to London or just don't like being rushed, these hotels are the answer:
San Juan Luis Munoz Marin Airport gets high marks for its on-time performance. 81% of flights that depart SJU reach their destination on time.

Arriving in London

London Heathrow Airport (LHR)

London Heathrow Airport (LHR) to central London takes about 45 minutes by car. The centre is roughly 26 kilometres away.
Getting there by public transport takes about 25 minutes.
If you're arriving on a late flight from San Juan to London, few things beat the convenience of staying near the terminal. Grab your suitcases from the carousel and then be showered and resting soon after at one of these accommodation options near LHR:
Begin your adventure by picking up a London Heathrow Airport rental car. Grab a set of wheels from Surprice, U-Save or Green Motion and experience the lesser-explored corners of London and beyond.
Reserving your vehicle from London Heathrow Airport about one week in advance can help you get the lowest rate.

London Gatwick Airport (LGW)

London Gatwick Airport (LGW) is about 40 kilometres from the centre of London. Once you've disembarked your flight from San Juan to London, it takes approximately 1 hour 5 minutes to get to the heart of the city in a taxi or ride-share.
If you're travelling on public transport, it'll take around 45 minutes.
Hang up the 'Do not disturb' sign and relax at a hotel near LGW. Here are a few options where you can check in after your flight from San Juan to London:
Green Motion, U-Save and Drivalia make picking up a London Gatwick Airport rental car easy and quick. These trusted providers are located in or around the terminal and will get you on your way in no time.
Lock in the best price by booking your ride from LGW three weeks in advance. You'll also have access to a greater selection of vehicles.

London Stansted Airport (STN)

London Stansted Airport (STN) is about 48 kilometres from the centre of London. It'll take you about 1 hour 5 minutes to reach the city centre by taxi or ride-share once you've stepped off your flight from San Juan to London.
If you use public transport, the journey time is around 45 minutes.
Book a hotel close to STN and get from baggage claim to your bed in a snap. Whether you're catching a late San Juan to London flight or just want a stress-free arrival, these accommodation options will have you settling in quickly:
Begin your trip without stressing over how to arrive at your destination with a London Stansted Airport rental car. Book your ideal wheels with reliable names here like Green Motion, Drivalia and Europcar.
Around four weeks ahead of your flight from San Juan to London is a good time to secure your vehicle from STN. You're more likely to find a cheaper rate or get access to early bird discounts.

Best time to go to London

March is the quietest month for flights from San Juan to London, while July is the busiest. Pick the ideal time to go to London based on whether you like a lively atmosphere or a more laid-back vibe.
When booking your San Juan to London tickets, think about the weather you're most comfortable in. July is the warmest month in London, with temperatures ranging from 11ºC to 26ºC.
If you like travelling in cooler conditions, look for a cheap flight from San Juan to London in January when temperatures average between 0ºC and 9ºC.

More about London

After booking your flight from San Juan to London, find a hotel that offers the right mix of comfort and location. Make one of these options your base for exploring London:
The British Museum and Westminster Abbey are just the start of the top attractions to add to your London must-do list. Continue your sightseeing adventures at Big Ben.

Explore more of the United Kingdom

London is easy to fall in love with, but there are so many other corners of the United Kingdom waiting to be explored. Around 257 kilometres northwest of London, a visit to Manchester will keep you busy. Start with attractions like Manchester United Museum & Stadium Tour, The Homes of Football and Science and Industry Museum.
Around 161 kilometres northwest of London, Birmingham is another favourite stop in the United Kingdom. Experience major highlights starting with Birmingham Museum & Art Gallery, Birmingham Hippodrome and Bournville Experience.