Cheap flights from London Heathrow Airport to San Juan from £272
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
8 Jan — 15 Jan1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to San Juan are usually found in September or March, booked 43 days in advance, depart on a Monday or Wednesday and return on a Tuesday
Cheap flight deals from Heathrow to San Juan
Enter your travel dates to find the best prices.
Cheapest flights from Heathrow to San Juan
Explore the most affordable flight options available from Heathrow to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 December 2025.
Tue 16/1209:20LHR - SJU
1 stop18h 34mJetBlue
Tue 17/223:50SJU - LHR
1 stop17h 50mJetBlue
Deal found 7/12£651
Wed 17/1212:20LHR - SJU
1 stop19h 28mJetBlue
Wed 25/223:59SJU - LHR
1 stop17h 41mJetBlue
Deal found 8/12£654
Wed 24/1212:20LHR - SJU
1 stop18h 39mJetBlue
Tue 30/1220:55SJU - LHR
1 stop20h 45mJetBlue
Deal found 7/12£669
Sat 27/1209:20LHR - SJU
1 stop18h 36mJetBlue
Sun 28/1208:10SJU - LHR
1 stop21h 20mJetBlue
Deal found 6/12£699
Mon 8/1208:05LHR - SJU
1 stop18h 04mJetBlue
Sun 14/1219:50SJU - LHR
1 stop20h 55mJetBlue
Deal found 7/12£738
Mon 29/1209:20LHR - SJU
1 stop28h 40mJetBlue
Fri 9/120:15SJU - LHR
1 stop21h 45mJetBlue
Deal found 8/12£758
Wed 24/1209:20LHR - SJU
1 stop18h 36mJetBlue
Wed 7/119:15SJU - LHR
1 stop22h 25mJetBlue
Deal found 9/12£785
Thu 11/1207:25LHR - SJU
1 stop18h 29mJetBlue
Sun 28/1220:55SJU - LHR
1 stop19h 50mJetBlue
Deal found 8/12£795
Best flights from Heathrow to San Juan
Discover carefully curated flight deals from Heathrow to San Juan that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 December 2025.
Sun 1/212:20LHR - SJU
1 stop18h 05mJetBlue
Tue 10/211:15SJU - LHR
1 stop18h 15mJetBlue
Deal found 7/12£545
Fri 23/112:15LHR - SJU
2 stops25h 32mMultiple Airlines
Fri 30/106:00SJU - LHR
2 stops33h 30mMultiple Airlines
Deal found 9/12£571
Fri 6/309:20LHR - SJU
1 stop16h 36mJetBlue
Wed 11/304:15SJU - LHR
1 stop13h 25mJetBlue
Deal found 7/12£550
Fri 6/309:20LHR - SJU
1 stop16h 36mJetBlue
Tue 10/304:15SJU - LHR
1 stop13h 25mJetBlue
Deal found 7/12£550
Fri 6/309:20LHR - SJU
1 stop16h 36mJetBlue
Mon 9/322:59SJU - LHR
1 stop18h 41mJetBlue
Deal found 7/12£550
Fri 6/309:20LHR - SJU
1 stop16h 36mJetBlue
Thu 12/305:01SJU - LHR
1 stop12h 39mJetBlue
Deal found 7/12£550
Fri 1/511:55LHR - SJU
1 stop15h 55mJetBlue
Mon 11/503:30SJU - LHR
1 stop12h 15mJetBlue
Deal found 7/12£551
Thu 23/408:25LHR - SJU
1 stop20h 50mJetBlue
Thu 30/413:50SJU - LHR
1 stop14h 40mJetBlue
Deal found 8/12£562
Tue 21/411:55LHR - SJU
1 stop18h 52mJetBlue
Sat 25/401:59SJU - LHR
1 stop13h 46mJetBlue
Deal found 8/12£562
Thu 7/511:55LHR - SJU
1 stop15h 55mJetBlue
Sun 10/521:25SJU - LHR
1 stop18h 20mJetBlue
Deal found 7/12£580
Thu 7/511:55LHR - SJU
1 stop15h 55mJetBlue
Sat 9/521:25SJU - LHR
1 stop18h 20mJetBlue
Deal found 7/12£581
Fri 17/408:15LHR - SJU
1 stop17h 05mJetBlue
Thu 23/401:59SJU - LHR
1 stop13h 46mJetBlue
Deal found 8/12£581
Last-minute flights from Heathrow to San Juan
Discover last-minute flight deals from Heathrow to San Juan. Data last updated 9 December 2025 and is based on user searches.
Wed 7/107:25LHR - SJU
1 stop16h 01mJetBlue
Wed 14/119:15SJU - LHR
1 stop22h 25mJetBlue
Deal found 8/12£558
Thu 15/109:20LHR - SJU
1 stop18h 28mJetBlue
Thu 22/106:05SJU - LHR
1 stop23h 25mJetBlue
Deal found 8/12£564
Thu 22/112:15LHR - SJU
3 stops31h 20mMultiple Airlines
Thu 29/110:52SJU - LHR
2 stops19h 58mMultiple Airlines
Deal found 8/12£591
Fri 23/112:15LHR - SJU
2 stops25h 32mMultiple Airlines
Fri 30/106:00SJU - LHR
2 stops33h 30mMultiple Airlines
Deal found 9/12£571
Tue 27/112:15LHR - SJU
3 stops31h 20mMultiple Airlines
Tue 3/206:00SJU - LHR
3 stops33h 30mMultiple Airlines
Deal found 9/12£568
Sat 31/109:20LHR - SJU
1 stop17h 35mJetBlue
Tue 10/211:15SJU - LHR
1 stop18h 15mJetBlue
Deal found 7/12£545
Sat 31/109:20LHR - SJU
1 stop17h 35mJetBlue
Mon 9/211:15SJU - LHR
1 stop18h 15mJetBlue
Deal found 7/12£557
One-way flights from Heathrow to San Juan
Search for one-way flight options from Heathrow to San Juan. Find affordable one-way fares based on user searches. Data last updated 9 December 2025.
Fri 27/212:20LHR - SJU
1 stop15h 24mJetBlue
Deal found 8/12£272
Fri 20/210:45LHR - SJU
2 stops34h 20mMultiple Airlines
Deal found 8/12£313
Mon 26/110:20LHR - SJU
2 stops34h 05mMultiple Airlines
Deal found 8/12£326
Fri 16/120:50LHR - SJU
2 stops51h 34mMultiple Airlines
Deal found 7/12£339
Fri 20/208:05LHR - SJU
1 stop23h 49mJetBlue
Deal found 8/12£349
Sun 1/312:20LHR - SJU
1 stop15h 24mJetBlue
Deal found 7/12£362
Thu 8/118:50LHR - SJU
3 stops53h 34mMultiple Airlines
Deal found 9/12£409
Sun 11/107:45LHR - SJU
1 stop20h 05mJetBlue
Deal found 9/12£431
Wed 7/119:40LHR - SJU
3 stops54h 02mMultiple Airlines
Deal found 9/12£436
Find flight deals from Heathrow to San Juan
Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to San Juan (PR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 9 December 2025.
Customise your flight search to find flights from Heathrow to San Juan that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 9 December 2025.
Use the filters below to find and compare flights from London Heathrow Airport to San Juan that are best for you.
Fly from
Heathrow
Fly to
San Juan
Route
Depart
Return
Price
LondonSan Juan
LHR - SJU
LHRSJU
London Heathrow
Sun 1/2
12:20-02:25
1 stop18h 05m
San Juan Luis Munoz Marin Intl
Tue 10/2
11:15-09:30
1 stop18h 15m
£545
LondonSan Juan
LHR - SJU
LHRSJU
London Heathrow
Fri 6/3
09:20-21:56
1 stop16h 36m
San Juan Luis Munoz Marin Intl
Wed 11/3
04:15-21:40
1 stop13h 25m
£550
LondonSan Juan
LHR - SJU
LHRSJU
London Heathrow
Fri 6/3
09:20-21:56
1 stop16h 36m
San Juan Luis Munoz Marin Intl
Tue 10/3
04:15-21:40
1 stop13h 25m
£550
LondonSan Juan
LHR - SJU
LHRSJU
London Heathrow
Fri 6/3
09:20-21:56
1 stop16h 36m
San Juan Luis Munoz Marin Intl
Mon 9/3
22:59-21:40
1 stop18h 41m
£550
LondonSan Juan
LHR - SJU
LHRSJU
London Heathrow
Fri 6/3
09:20-21:56
1 stop16h 36m
San Juan Luis Munoz Marin Intl
Thu 12/3
05:01-21:40
1 stop12h 39m
£550
LondonSan Juan
LHR - SJU
LHRSJU
London Heathrow
Fri 1/5
11:55-22:50
1 stop15h 55m
San Juan Luis Munoz Marin Intl
Mon 11/5
03:30-20:45
1 stop12h 15m
£551
LondonSan Juan
LHR - SJU
LHRSJU
London Heathrow
Thu 23/4
08:25-00:15
1 stop20h 50m
San Juan Luis Munoz Marin Intl
Thu 30/4
13:50-09:30
1 stop14h 40m
£562
LondonSan Juan
LHR - SJU
LHRSJU
London Heathrow
Tue 21/4
11:55-01:47
1 stop18h 52m
San Juan Luis Munoz Marin Intl
Sat 25/4
01:59-20:45
1 stop13h 46m
£562
LondonSan Juan
LHR - SJU
LHRSJU
London Heathrow
Fri 23/1
12:15-09:47
2 stops25h 32m
San Juan Luis Munoz Marin Intl
Fri 30/1
06:00-19:30
2 stops33h 30m
£571
LondonSan Juan
LHR - SJU
LHRSJU
London Heathrow
Thu 7/5
11:55-22:50
1 stop15h 55m
San Juan Luis Munoz Marin Intl
Sun 10/5
21:25-20:45
1 stop18h 20m
£580
Flights are sorted by cheapest return flights first.
Deals found on 8/12
Showing 1-10 of 22 results
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Best time to book a flight from Heathrow to San Juan
Have a flexible travel schedule? Discover the best time to fly to San Juan from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from London Heathrow Airport to San Juan
How far ahead should I book a flight from London Heathrow Airport to San Juan?
Use this chart to determine the optimal time to book a return flight from Heathrow to San Juan. Price data was last updated on 5 December 2025.
The best time to book flights from London Heathrow Airport to San Juan is 43 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from London Heathrow Airport to San Juan?
Currently, June is the cheapest month in which you can book a flight from London Heathrow Airport to San Juan (average of £441). Flying from London Heathrow Airport to San Juan in December is currently the most expensive (average of £541). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from LHR to SJU?
Find hourly flight availability from Heathrow to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 9 December 2025.
A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to San Juan in the afternoon. If you’re flexible enough to do this you can expect to save up to 12% on your trip compared to booking a flight in the morning.
Reviews of airlines servicing San Juan
Get insights into the airlines that provide service to San Juan. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Juan. Reviews last updated 9 December 2025.
Read reviews from past customers who have flown with Finnair, JetBlue, andIcelandair
from London Heathrow Airport to San Juan. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Related info for your journey
Find useful and relevant information for your journey from Heathrow to San Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
How long is the flight from London Heathrow Airport to San Juan?
Airlines like JetBlue fly from London Heathrow Airport to San Juan in about 18h 05m. The time it takes to get you to your destination can typically vary by up to . The distance from London Heathrow Airport to San Juan is about 4179 mi.
What are the cheapest airlines flying from London Heathrow Airport to San Juan round-trip?
Our cheapest airline available from London Heathrow Airport to San Juan is Virgin Atlantic. Our recent data shows that you can find tickets from as low as £335 on this airline. Additional options worth looking into are Finnair and JetBlue, starting at £452 and £454 round-trip. Virgin Atlantic is currently priced 48% below the average price you’ll pay for this route.
Can I find deals for business class flights from Heathrow to San Juan?
Yes. Cheapflights offers flight deals from Heathrow to San Juan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London Heathrow Airport to San Juan?
Currently, June is the cheapest month in which you can book a flight from London Heathrow Airport to San Juan (average of £441). Flying from London Heathrow Airport to San Juan in December is currently the most expensive (average of £541). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 9 December 2025.
Discover the top 6 airlines that operate flights from Heathrow to San Juan. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 9 December 2025.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Heathrow to San Juan?
Cheapflights helps you search for flights from Heathrow to San Juan via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from Heathrow to San Juan?
Cheapflights simply makes it quick and affordable to book flights from Heathrow to San Juan by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.
Can Cheapflights find flights from Heathrow to San Juan with no change fees?
Users can book flights with no change fees policies with our dedicated filters. Book flights from Heathrow to San Juan flexibly with Cheapflights today.
Can Cheapflights notify me if prices for flights from Heathrow to San Juan become cheaper?
Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!
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