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Cheap Flights from London Heathrow to San Juan

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Compare London Heathrow to San Juan flight deals

Find the cheapest month or even day of the year to fly to San Juan

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Flight deals from London Heathrow to San Juan

Looking for a cheap last-minute deal or the best return flight from London Heathrow to San Juan? Find the lowest prices on one-way and return tickets right here.
San Juan.606 € per passenger.Departing Mon, 2 Jun, returning Tue, 17 Jun.Return flight with jetBlue.Outbound indirect flight with jetBlue, departs from London Heathrow on Mon, 2 Jun, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with jetBlue, departs from San Juan Luis Munoz Marin on Tue, 17 Jun, arriving in London Heathrow.Price includes taxes and charges.From 606 €, select.
San Juan.616 € per passenger.Departing Sat, 17 May, returning Sun, 25 May.Return flight with Austrian Airlines and Frontier Airlines.Outbound indirect flight with Austrian Airlines, departs from London Heathrow on Sat, 17 May, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Sun, 25 May, arriving in London Heathrow.Price includes taxes and charges.From 616 €, select.
San Juan.627 € per passenger.Departing Wed, 11 Feb, returning Wed, 25 Feb.Return flight with Vueling Airlines and Iberia.Outbound indirect flight with Vueling Airlines, departs from London Heathrow on Wed, 11 Feb, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Iberia, departs from San Juan Luis Munoz Marin on Wed, 25 Feb, arriving in London Heathrow.Price includes taxes and charges.From 627 €, select.
San Juan.630 € per passenger.Departing Tue, 20 Jan, returning Tue, 3 Feb.Return flight with Vueling Airlines and Iberia.Outbound indirect flight with Vueling Airlines, departs from London Heathrow on Tue, 20 Jan, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Iberia, departs from San Juan Luis Munoz Marin on Tue, 3 Feb, arriving in London Heathrow.Price includes taxes and charges.From 630 €, select.
San Juan.631 € per passenger.Departing Thu, 15 Jan, returning Mon, 26 Jan.Return flight with Vueling Airlines and Iberia.Outbound indirect flight with Vueling Airlines, departs from London Heathrow on Thu, 15 Jan, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Iberia, departs from San Juan Luis Munoz Marin on Mon, 26 Jan, arriving in London Heathrow.Price includes taxes and charges.From 631 €, select.
San Juan.631 € per passenger.Departing Wed, 25 Feb, returning Wed, 4 Mar.Return flight with Vueling Airlines and Iberia.Outbound indirect flight with Vueling Airlines, departs from London Heathrow on Wed, 25 Feb, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Iberia, departs from San Juan Luis Munoz Marin on Wed, 4 Mar, arriving in London Heathrow.Price includes taxes and charges.From 631 €, select.
San Juan.638 € per passenger.Departing Thu, 29 May, returning Thu, 5 Jun.Return flight with SWISS and Frontier Airlines.Outbound indirect flight with SWISS, departs from London Heathrow on Thu, 29 May, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Thu, 5 Jun, arriving in London Heathrow.Price includes taxes and charges.From 638 €, select.
San Juan.667 € per passenger.Departing Wed, 11 Mar, returning Wed, 18 Mar.Return flight with Vueling Airlines and Iberia.Outbound indirect flight with Vueling Airlines, departs from London Heathrow on Wed, 11 Mar, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Iberia, departs from San Juan Luis Munoz Marin on Wed, 18 Mar, arriving in London Heathrow.Price includes taxes and charges.From 667 €, select.

Find the cheapest month to fly from London Heathrow to San Juan

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London Heathrow to San Juan flights are currently cheapest in June.
May
from 616 €
Jun
from 606 €
Jul
from 713 €
Aug
from 851 €
Sep
from 685 €
Oct
from 704 €
Nov
from 710 €
Dec
from 718 €
Jan
from 631 €
Feb
from 627 €
Mar
from 667 €
Apr
from 981 €

Alternative London Heathrow to San Juan routes

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

London to San Juan: Flight information

The things to know before you go.
Cheapest flight found606 €
Cheapest month to flyJune

Finding cheap flights from London Heathrow 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 Heathrow to San Juan is 606 €. 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 Heathrow to San Juan. But we found flights with one or more stops from 606 €.
As of May 2025, there are no flights flying from London Heathrow to San Juan.
The cheapest month to fly from London Heathrow to San Juan is usually May 2025.
If you're flying from London Heathrow Airport, 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 606 €.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Heathrow Airport to San Juan on Monday, 2 June 2025.
No airlines currently offer direct flights between London Heathrow Airport 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 May, the average temperature is usually around 27°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.
Currently, jetBlue offers the cheapest flight tickets to San Juan.

Flying from London Heathrow Airport (LHR) to San Juan: what you need to know

  • The timezone in San Juan is UTC-4. The city is 4 hours behind London, where London Heathrow Airport is located.

  • Give yourself plenty of time to make your flight from LHR to San Juan. It's generally best to arrive two hours before international departures and an hour ahead for domestic flights.

  • You'll likely experience bigger queues during popular months like July and other peak periods. Arriving up to four hours in advance for an international flight and two hours for a domestic departure is a smart move.

  • We make it a breeze to find a flight from LHR to San Juan that includes a stopover. To see the options, uncheck 'Direct flights only.' Next, pick a flight that has a stop long enough to tour your chosen city. Major stopovers include:

    • Logan International Airport (BOS)

    • Grantley Adams International Airport (BGI)

    • John F. Kennedy International Airport (JFK)

  • When travelling to Puerto Rico for tourism purposes, you'll need an ETA if you hold a passport from United Kingdom. However, visa rules can change and you may need other documents depending on the duration and purpose of your trip. Always check the most recent guidelines before booking your cheap ticket from London Heathrow Airport to San Juan.

  • LHR is about 31 kilometres from central London. If you're catching a cab, ride-sharing or driving from the centre, it'll take you 57 minutes or so to get there, depending on traffic conditions. If you're using public transport, expect the journey time to be around 1 hour and 1 minute.

  • After a hassle-free start to your holiday? Stay near LHR. Whether you have an early flight from London Heathrow Airport to San Juan or want to avoid feeling rushed, these hotels are ideal:

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

  • 342 € is the lowest price for a one-way ticket from London Heathrow Airport to San Juan. A return flight starts from 606 €. These prices can change based on availability and demand.

  • To score cheap tickets from LHR to San Juan, book as early as you can. Airlines tend to offer their best fares when flights are first released.

  • The 'Whole month' tool shows you the cheapest tickets from London Heathrow Airport to San Juan across every month. It's the best way to snap up a bargain if your dates are flexible.

  • Create a Price Alert for cheap tickets from LHR to San Juan. There's no need to search every day to see whether prices have fallen. We'll update you when there's a change in price.

  • Play around with the filters to find your ideal journey. To see the 'Cheapest,' 'Best' or 'Fastest' flights from London Heathrow Airport to San Juan, use the 'Sort by' tool. You can also filter results by departure and arrival times, airline, and journey duration.

Airports in San Juan

Luis Munoz Marin International Airport (SJU)

Fernando Luis Ribas Dominicci Airport (SIG)

  • Once your flight from London Heathrow Airport to San Juan has landed, you can reach the city centre in about 14 minutes by car. Central San Juan is approximately 8 kilometres from Fernando Luis Ribas Dominicci Airport (SIG).

  • You can also travel by public transport, which will take roughly 58 minutes.

  • There are some great places to park your luggage (and yourself) near SIG. Settle in and get cosy after your flight from LHR to San Juan at one of these perfectly located options:

Best time to go to San Juan

  • It's time to plan your travel dates for your flight from London Heathrow Airport to San Juan. July is the busiest month to visit San Juan. If you prefer a more low-key vibe, go in May.

  • The warmest month in San Juan is September, with the temperature ranging between 23ºC and 33ºC. Lock in your flights from London Heathrow Airport to San Juan in this month if you enjoy this type of weather.

  • If you want to travel in cooler conditions, lock in a cheap flight from LHR to San Juan in February when temperatures average between 20ºC and 28ºC.

More about San Juan

  • When it comes to looking for somewhere to lay your head, you'll find the best stays in San Juan right here. Browse these options after locking in your flight from London Heathrow Airport to San Juan:

  • There are so many things to discover in this city it can be hard to work out where to begin. Castillo San Felipe del Morro, La Garita del morro de san juan bahia and Fortaleza Street are major attractions which should be on any good San Juan itinerary.

Complete your San Juan trip with a car rental

  • We use the same magic that helped you find your cheap flight from London Heathrow Airport to San Juan to track down incredible deals on car rentals. Search for your ride in seconds and compare your options in one place. Plus you'll find all the info on car rentals in San Juan, from the most popular rental company to the best time to book.

Plan the rest of your trip from London to San Juan

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.