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Cheap Flights 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 round-trip flight from London Heathrow to San Juan? Find the lowest prices on one-way and round-trip tickets right here.
San Juan.AED 1,981 per passenger.Departing Mon, Feb 9, returning Mon, Feb 16.Round-trip flight with jetBlue.Outbound indirect flight with jetBlue, departing from London Heathrow on Mon, Feb 9, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with jetBlue, departing from San Juan Luis Munoz Marin on Mon, Feb 16, arriving in London Heathrow.Price includes taxes and charges.From AED 1,981, select.
San Juan.AED 1,981 per passenger.Departing Wed, Jan 28, returning Wed, Feb 4.Round-trip flight with jetBlue.Outbound indirect flight with jetBlue, departing from London Heathrow on Wed, Jan 28, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with jetBlue, departing from San Juan Luis Munoz Marin on Wed, Feb 4, arriving in London Heathrow.Price includes taxes and charges.From AED 1,981, select.
San Juan.AED 2,191 per passenger.Departing Thu, Jan 22, returning Sat, Jan 31.Round-trip flight with Icelandair and Frontier Airlines.Outbound indirect flight with Icelandair, departing from London Heathrow on Thu, Jan 22, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departing from San Juan Luis Munoz Marin on Sat, Jan 31, arriving in London Heathrow.Price includes taxes and charges.From AED 2,191, select.
San Juan.AED 2,426 per passenger.Departing Wed, Mar 4, returning Mon, Mar 16.Round-trip flight with Avianca.Outbound indirect flight with Avianca, departing from London Heathrow on Wed, Mar 4, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Avianca, departing from San Juan Luis Munoz Marin on Mon, Mar 16, arriving in London Heathrow.Price includes taxes and charges.From AED 2,426, select.
San Juan.AED 2,566 per passenger.Departing Thu, Feb 19, returning Mon, Mar 2.Round-trip flight with SWISS and Spirit Airlines.Outbound indirect flight with SWISS, departing from London Heathrow on Thu, Feb 19, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Spirit Airlines, departing from San Juan Luis Munoz Marin on Mon, Mar 2, arriving in London Heathrow.Price includes taxes and charges.From AED 2,566, select.
San Juan.AED 2,598 per passenger.Departing Wed, Apr 29, returning Sat, May 9.Round-trip flight with Avianca.Outbound indirect flight with Avianca, departing from London Heathrow on Wed, Apr 29, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Avianca, departing from San Juan Luis Munoz Marin on Sat, May 9, arriving in London Heathrow.Price includes taxes and charges.From AED 2,598, select.
San Juan.AED 2,669 per passenger.Departing Wed, Mar 18, returning Wed, Apr 1.Round-trip flight with Avianca.Outbound indirect flight with Avianca, departing from London Heathrow on Wed, Mar 18, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Avianca, departing from San Juan Luis Munoz Marin on Wed, Apr 1, arriving in London Heathrow.Price includes taxes and charges.From AED 2,669, select.
San Juan.AED 2,715 per passenger.Departing Tue, Apr 7, returning Mon, Apr 20.Round-trip flight with Avianca.Outbound indirect flight with Avianca, departing from London Heathrow on Tue, Apr 7, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Avianca, departing from San Juan Luis Munoz Marin on Mon, Apr 20, arriving in London Heathrow.Price includes taxes and charges.From AED 2,715, 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 February.
Dec
from AED 3,640
Jan
from AED 2,189
Feb
from AED 1,979
Mar
from AED 2,423
Apr
from AED 2,712
May
from AED 2,712
Jun
from AED 2,712
Jul
from AED 4,002
Aug
from AED 3,847
Sep
from AED 2,960
Oct
from AED 2,960
Nov
from AED 2,905

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 foundAED 1,981
Cheapest month to flyJanuary

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 round-trip flight from London Heathrow to San Juan is AED 1,981. 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 AED 1,979.
There are no flights flying from London Heathrow to San Juan, as of December 2025.
The cheapest month to fly from London Heathrow to San Juan is usually January.
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 center of San Juan. We've found flights to this airport from AED 1,981.
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 Wednesday, January 28, 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 December, the average temperature is usually around 25°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 four hours behind London, where London Heathrow Airport is located.

  • For hassle-free travel, arrive at the airport two hours ahead of international flights and an hour before domestic departures. That way, you can comfortably board your LHR to San Juan flight.

  • Delays at check-in and security are likely if you're jetting off during high season, so give yourself some extra breathing room. A good rule of thumb for peak periods? Arrive up to four hours ahead for international flights and at least two hours for domestic departures.

  • Stopovers are the ideal opportunity to take a break from traveling and perhaps even tick off a new city. When searching for flight tickets from LHR to San Juan, deselect the 'Direct flights only' box to see where you can stop along the way. Consider one of these popular options:

    • John F. Kennedy International Airport (JFK)

    • Logan International Airport (BOS)

    • Grantley Adams International Airport (BGI)

  • LHR is about 26 kilometers from central London. If you're driving, ride-sharing or catching a cab from the center, it'll take you 55 minutes or so to get there, depending on traffic. If you're planning to take public transport, expect the trip time to be around 1 hour.

  • In search of a hotel close to LHR? If you've booked an early flight from London Heathrow Airport to San Juan, these stays will get you from your pillow to the plane in no time:

  • Of the departures from London Heathrow Airport, 68.18% arrive on time at their destination.

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

  • The lowest price we've found for a one-way London Heathrow Airport to San Juan flight is AED 1,502. The cheapest price for a return flight is AED 1,981. Bear in mind fares can change due to availability at the time of booking.

  • To pick up cheap flights from LHR to San Juan, book as early as you can. Airlines typically offer lower prices when tickets first go on sale.

  • If you have flexibility with your travel plans, try using the 'Whole month' search tool. It'll give you the lowest price across each month when searching for your London Heathrow Airport to San Juan ticket.

  • Stay on top of deals for cheap flights from LHR to San Juan by creating a Price Alert. We'll send you an email or push notification on the app when a new low fare is offered.

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

Airports in San Juan

Luis Munoz Marin International Airport (SJU)

  • Luis Munoz Marin International Airport (SJU) to the center of San Juan takes about 10 minutes to reach by car. The center is roughly 8 kilometers away.

  • It takes around 55 minutes if you're using public transport.

  • If you have a late flight from London Heathrow Airport to San Juan, nothing beats 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 hotels near SJU:

  • Explore without limits with a Luis Munoz Marin International Airport rental car. Book your wheels from Sixt, Ace Rent a Car or U-Save and discover more of San Juan and beyond.

  • Reserving your vehicle from Luis Munoz Marin International Airport about two weeks before your flight from LHR to San Juan can help you get the lowest rate.

Fernando Luis Ribas Dominicci Airport (SIG)

  • Once your flight from London Heathrow Airport to San Juan has hit the tarmac, you can reach the city center in about 15 minutes by car. Central San Juan is roughly 8 kilometers from Fernando Luis Ribas Dominicci Airport (SIG).

  • If you travel by public transport, you'll reach the center in 1 hour or so.

  • Hang up the 'Do not disturb' sign and rest at a hotel close to SIG. Here are a few options where you can kick back after your LHR to San Juan flight:

Best time to go to San Juan

  • Carefully consider your dates before securing your flight from London Heathrow Airport to San Juan. The city comes alive during high season, but rates are usually higher and top attractions can be busy. Visit San Juan in the low season if you want a more relaxed vibe.

  • Before booking a London Heathrow Airport to San Juan flight ticket, think about the kind of weather forecast you're hoping for. September is the warmest month in San Juan, with temperatures ranging from 23ºC (73ºF) to 33ºC (91ºF).

  • February has average temperatures of between 20ºC (68ºF) and 28ºC (82ºF). Look 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 right by choosing the perfect place to stay. Once you've booked your flight from London Heathrow Airport to San Juan, explore our selection of hotels including:

  • Every great journey has to include a little sightseeing. La Garita del morro de san juan bahia, Castillo San Felipe del Morro and Fortaleza Street are must-visits when exploring San Juan.

Explore more of Puerto Rico

  • You've done San Juan, now it's time to discover more of Puerto Rico. Travel around 113 kilometers west to Aguadilla to tick off its popular sights. From El Parterre to Aguadilla Ice Skating Arena and Bandera de los Reyes Magos, you'll have a packed itinerary ahead.

  • Isabela is another standout destination in Puerto Rico and is around 105 kilometers west of San Juan. No journey is complete without seeing Amarillo Mango, Urb. Llanos Piscina Park and Noches de Artesania.

More travel options

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.