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Cheap flight tickets from London Heathrow to San Juan

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 Airport to San Juan? If you want to travel next month, return fares start from RM3,645. Find the lowest prices on one-way and return tickets right here.
San Juan.RM2,196 per passenger.Departing Wed, 10 Mar.One-way flight with Iberia.Outbound indirect flight with Iberia, departs from London Heathrow on Wed, 10 Mar, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From RM2,196, select.
San Juan.RM2,198 per passenger.Departing Mon, 18 Jan.One-way flight with Iberia.Outbound indirect flight with Iberia, departs from London Heathrow on Mon, 18 Jan, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From RM2,198, select.
San Juan.RM2,199 per passenger.Departing Wed, 3 Feb.One-way flight with Iberia.Outbound indirect flight with Iberia, departs from London Heathrow on Wed, 3 Feb, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From RM2,199, select.
San Juan.RM2,228 per passenger.Departing Sun, 13 Sep.One-way flight with Avianca.Outbound indirect flight with Avianca, departs from London Heathrow on Sun, 13 Sep, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From RM2,228, select.
San Juan.RM2,274 per passenger.Departing Mon, 1 Jun.One-way flight with Avianca.Outbound indirect flight with Avianca, departs from London Heathrow on Mon, 1 Jun, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From RM2,274, select.
San Juan.RM2,276 per passenger.Departing Mon, 24 Aug.One-way flight with Avianca.Outbound indirect flight with Avianca, departs from London Heathrow on Mon, 24 Aug, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From RM2,276, select.
San Juan.RM2,280 per passenger.Departing Tue, 17 Nov.One-way flight with Avianca.Outbound indirect flight with Avianca, departs from London Heathrow on Tue, 17 Nov, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From RM2,280, select.
San Juan.RM2,290 per passenger.Departing Thu, 1 Apr.One-way flight with Avianca.Outbound indirect flight with Avianca, departs from London Heathrow on Thu, 1 Apr, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From RM2,290, select.
San Juan.RM2,294 per passenger.Departing Tue, 4 May.One-way flight with Avianca.Outbound indirect flight with Avianca, departs from London Heathrow on Tue, 4 May, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From RM2,294, select.
San Juan.RM2,356 per passenger.Departing Tue, 27 Oct.One-way flight with Avianca.Outbound indirect flight with Avianca, departs from London Heathrow on Tue, 27 Oct, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From RM2,356, select.
San Juan.RM2,622 per passenger.Departing Fri, 11 Dec.One-way flight with Vueling Airlines.Outbound indirect flight with Vueling Airlines, departs from London Heathrow on Fri, 11 Dec, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From RM2,622, select.
San Juan.RM2,636 per passenger.Departing Sun, 31 May.One-way flight with Avianca.Outbound indirect flight with Avianca, departs from London Heathrow on Sun, 31 May, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From RM2,636, select.
San Juan.RM2,780 per passenger.Departing Tue, 14 Jul.One-way flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from London Heathrow on Tue, 14 Jul, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From RM2,780, 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 March.
May
from RM2,636
Jun
from RM2,274
Jul
from RM2,780
Aug
from RM2,276
Sep
from RM2,228
Oct
from RM2,356
Nov
from RM2,280
Dec
from RM2,622
Jan
from RM2,198
Feb
from RM2,199
Mar
from RM2,196
Apr
from RM2,290

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.

San Juan Isla Grande

1km from central San Juan
Closest
Search flights

San Juan Luis Munoz Marin

11km from central San Juan
Cheapest
from RM2,196
Search flights

Roosevelt Roads

55km from central San Juan
Search flights

Ponce

70km from central San Juan
Search flights

Vieques

82km from central San Juan
Search flights

Culebra

85km from central San Juan
Search flights

London to San Juan: Flight information

The things to know before you go.
Cheapest flight foundRM2,196
Cheapest month to flyMarch

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 RM3,431. 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 RM3,431.
As of May 2026, there are no flights flying from London Heathrow to San Juan.
The cheapest month to fly from London Heathrow to San Juan is usually September.
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 RM3,431.
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 Tuesday, 8 September 2026.
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

  • London Heathrow Airport is located in London. Based in the UTC-4 timezone, San Juan is four hours behind London.

  • Give yourself plenty of time to catch your LHR to San Juan flight. Generally, it's best to arrive two hours before international departures and an hour ahead for domestic flights.

  • You can expect bigger queues during popular months like July. Arriving up to four hours ahead of an international flight and two hours for domestic departures is a smart move.

  • We make it a breeze to book plane tickets from LHR to San Juan with a stopover. To see all your options, uncheck 'Direct flights only.' Then, choose a flight with a stop long enough to explore your chosen city. Top stopovers include:

    • New York John F. Kennedy International Airport (JFK)

    • Boston Logan International Airport (BOS)

    • Grantley Adams International Airport (BGI)

  • LHR is around 26 kilometres from central London. If you're driving, catching a taxi or ride-sharing from the centre, it'll take you 45 minutes or so to get there, depending on traffic conditions. If you're taking public transport, expect the trip time to be around 25 minutes.

  • Want a hassle-free start to your trip? Stay near LHR. Whether you're boarding an early flight from London Heathrow Airport to San Juan or want to avoid feeling rushed, these hotels put convenience first:

  • When it comes to the on-time performance of London Heathrow Airport, data shows 78% of flights meet their scheduled arrival time.

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

  • The lowest price we've seen for a one-way London Heathrow Airport to San Juan flight is RM2,196. The cheapest price for a return flight is RM3,431. Keep in mind fares may change due to availability at the time of booking.

  • Don't leave everything to the last moment. You're more likely to pick up cheap flights from LHR to San Juan if you book early. Airlines often offer some fantastic early bird discounts.

  • Scoring cheap tickets from London Heathrow Airport to San Juan is more likely if you're flexible with your trip dates. Try using the 'Whole month' search tool to get the lowest fares across the month and walk away with an epic deal.

  • Spend less time searching for cheap flights from LHR to San Juan by creating a Price Alert. You'll receive an email or push notification on the app when a special offer becomes available.

  • Find a cheap flight from London Heathrow Airport to San Juan with the help of our filters. Choose your ideal duration, departure time and airlines, then sort the results by 'Cheapest' to see the best deals.

Airports in San Juan

Luis Munoz Marin International Airport (SJU)

  • Luis Munoz Marin International Airport (SJU) is around 11 kilometres from central San Juan. If you're getting a taxi or a ride-share, the drive takes about 20 minutes.

  • Getting there on public transport takes about 1 hour.

  • Think about booking a hotel near SJU if you have a late flight from London Heathrow Airport to San Juan. Settle into one of these accommodation options and make your first night all about rest:

  • Lock in the best possible rate by reserving your vehicle from Luis Munoz Marin International Airport about two weeks ahead of your flight from LHR to San Juan.

Best time to go to San Juan

  • It's time to figure out your dates for your flight from London Heathrow Airport to San Juan. March is the most popular month to visit San Juan. If you want a more low-key vibe, go in December.

  • The warmest month in San Juan is August, with temperatures ranging between 24ºC (75ºF) and 32ºC (90ºF). Book your London Heathrow Airport to San Juan plane ticket then if that's your idea of comfortable weather.

  • February sees average temperatures of between 21ºC (70ºF) and 28ºC (82ºF). Search for a cheap ticket from LHR to San Juan around that time if you want to travel when it's cooler.

More about San Juan

  • Start your San Juan trip off on the right foot by choosing the ideal place to stay. As soon as you've booked your flight from London Heathrow Airport to San Juan, explore our selection of hotels including:

  • Every great adventure has to include a little sightseeing. Esperanza Beach, Balneario El Escambron and Escambron Green are attractions you won't want to skip in San Juan.

Explore more of Puerto Rico

  • You've seen San Juan, now it's time to discover more of Puerto Rico. Journey around 113 kilometres west to Aguadilla to tick off its leading attractions. From Silla Aguadilla to Bridges Surf Beach and Playa Rompe Olas, there's plenty to keep you busy.

  • Isabela is another standout destination in Puerto Rico and is around 105 kilometres west of San Juan. No journey is complete without seeing Playa montones, Shore Island Beach and Guajataca Forest Reserve.

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.