Cheap Flights from London to San Juan

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Flight deals from London to San Juan

Looking for a cheap last-minute deal or the best return flight from London to San Juan? If you want to travel next month, return fares start from Rs200,221. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from London to San Juan

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

London to San Juan: Flight information

The things to know before you go.
Cheapest flight foundRs106,615
Cheapest month to flySeptember

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

There are 6 airports in San Juan: San Juan Isla Grande, San Juan Luis Munoz Marin, Roosevelt Roads, Ponce, Vieques, and Culebra.
The best price we found for a return flight from London to San Juan is Rs183,783. 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.
Currently, there are no airlines that fly direct from London to San Juan. But we found flights with one or more stops from Rs183,783.
As of August 2026, there are no flights flying from London to San Juan.
The cheapest month to fly from London to San Juan is usually October.
If you're flying from London, the cheapest airport near San Juan is San Juan Luis Munoz Marin – which is 11.3 km away from the centre of San Juan. We've found flights into this airport from Rs183,783.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from London to San Juan on Thursday, 1 October 2026.
No airlines currently offer direct flights between London and San Juan. Most routes have one or more stops.
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 San Juan 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 San Juan is around 40 days in advance, so don’t leave your flight to the last minute.

In August, the average temperature is usually around 28°C. August is typically the warmest month in San Juan, when it usually averages around 29°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging 23°C. The rainiest month is September.
The cheapest airline that flies to San Juan is Norse Atlantic Airways (UK) .

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

  • You can select from numerous airports when organising your flight from London to San Juan. Check out your options for jetting out of London from London Heathrow Airport (LHR), London Gatwick Airport (LGW) or London Stansted Airport (STN). London Luton Airport (LTN) and London City Airport (LCY) also service London.

  • Hop off the plane at San Juan Luis Munoz Marin Airport (SJU), the major arrival point in San Juan.

  • San Juan's timezone is UTC-4, making San Juan four hours behind London.

  • For a smooth journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This leaves you with plenty of time to catch your London to San Juan flight.

  • You'll likely experience longer lines during popular months like July. Arriving up to four hours in advance for an international flight and two hours for a domestic departure is a wise move.

How to find the cheapest flights from London to San Juan

  • Booking early is often the key to locking in a cheap London to San Juan flight. Prices tend to rise as demand increases, so the nearer you get to departure, the more you'll likely pay.

  • Getting cheap plane tickets from London to San Juan is easier if you can be flexible with your dates. Try using the 'Whole month' function to see the best prices across the month and score a fantastic deal.

  • Cut down on the time spent looking for cheap flights from London to San Juan by setting up a Price Alert. You'll get an email or notification through the app when a special offer becomes available.

  • Select your ideal departure and arrival times, airlines and number of stops with the filters. Or sort your London to San Juan flight results by 'Fastest,' 'Best' or 'Cheapest.'

Flying from London

London Heathrow Airport (LHR)

  • We make it simple to find a London to San Juan flight with a stopover. To see your options leaving from London Heathrow Airport, deselect 'Direct flights only.' Next, pick a flight with a stop long enough to explore the city of your choice. Popular stopovers include:

    • New York John F. Kennedy Airport (JFK)

    • Boston Logan International Airport (BOS)

    • Bridgetown Airport (BGI)

  • The journey from central London to LHR takes about 25 minutes by public transport. If you drive, ride-share or get a taxi, you'll cover the 26 kilometres in 45 minutes or so, depending on traffic.

  • Looking for a convenient hotel close to London Heathrow Airport? If you've booked an early flight from London to San Juan, these stays will have you moments from your check-in counter:

  • Of all flights departing from London Heathrow Airport, 78% arrive as scheduled at their destination.

London Gatwick Airport (LGW)

  • Get the most out of your holiday with a stopover on your London to San Juan flight. Visit friends or family or cross another city off your list. Whatever you choose to do, check out these stops between London Gatwick Airport and San Juan:

    • New York John F. Kennedy Airport (JFK)

    • Madrid Airport (MAD)

    • Punta Cana Airport (PUJ)

  • Using public transport, you can travel from central London to LGW in around 45 minutes. The airport is roughly 40 kilometres away. Driving will take you about 1 hour 5 minutes.

  • Want to enjoy an extra night away before your flight from London to San Juan? Unwind in a hotel near London Gatwick Airport before your holiday officially begins. Stay at one of these accommodation options:

  • The majority of flights that leave London Gatwick Airport make it to their destination within the expected time frame. It boasts an on-time performance rate of 83%.

London Stansted Airport (STN)

  • Whether just for a couple of hours or a few days, a stopover can make your entire trip feel a little more stress-free. When flying out of London Stansted Airport (STN), you can book a ticket from London to San Juan stopping at Madrid Airport (MAD).

  • From central London, STN is around 48 kilometres away. It'll take you roughly 1 hour 5 minutes to arrive by car and 45 minutes or so if you take public transport.

  • Rest a little longer, move a little slower, and still make your London to San Juan flight without having to rush. These hotels near London Stansted Airport make getting to the terminal a breeze if you're flying out first thing:

  • STN has an on-time performance rate of 80%. This means the majority of its flights touch down on schedule and your trip is smooth and easy.

Arriving in San Juan

San Juan Luis Munoz Marin Airport (SJU)

  • San Juan Luis Munoz Marin Airport (SJU) is approximately 11 kilometres from the centre of San Juan. If you're catching a taxi or a ride-share, the drive takes roughly 20 minutes.

  • It usually takes 1 hour to get there when travelling by public transport.

  • If you have a late flight from London to San Juan, few things beat the convenience of staying near the terminal. Grab your bags from the carousel and then be showered and sleeping soon after at one of these accommodation options near SJU:

  • Go where the road takes you with a San Juan Luis Munoz Marin Airport rental car. Pick up your wheels from Sixt, Ace Rent a Car or U-Save and venture far and wide through San Juan and beyond.

  • Booking your ride from San Juan Luis Munoz Marin Airport around two weeks ahead increases your chances of getting a good deal.

San Juan Isla Grande Airport (SIG)

Best time to go to San Juan

  • March is the quietest month for flights from London to San Juan, while July is the most popular. Figure out the ideal time to go to San Juan based on whether you want a laid-back vibe or a lively atmosphere.

  • The warmest month in San Juan is August, with temperatures ranging between 24ºC and 32ºC. Lock in your London to San Juan ticket then if that's your ideal forecast.

  • If you want cooler conditions, search for a cheap flight from London to San Juan in February when temperatures average between 21ºC and 28ºC.

More about San Juan

  • Once you've booked your flight from London to San Juan, find a hotel that keeps you close to what you want to see. Make one of these accommodation options your base for exploring San Juan:

  • All great holidays should include some sightseeing. Balneario El Escambron, La Garita del morro de san juan bahia and Beach San Juan are attractions you won't want to skip in San Juan.

Explore more of Puerto Rico

  • San Juan is always a good idea, but there are so many other parts of Puerto Rico you'll want to see. Around 13 kilometres southwest of San Juan, a visit to Bayamon will fill your itinerary to the brim. Don't miss top attractions like Ron del Barrilito - Hacienda Santa Ana, Parque de las Ciencias by Toroverde Power by Claro and Parque Recreativo Río Bayamón.

  • Around 18 kilometres southeast of San Juan, Carolina is another favourite stop in Puerto Rico. Start your sightseeing at Isla Verde Beach, Carolina Public Beach and Balneario Isla Verde.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.