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 4/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SJU
27 Dec — 3 Jan1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to San Juan are usually found in September or January, booked 56 days in advance, depart on a Monday or Tuesday and return on a Wednesday
Find flight deals from London to San Juan
Enter your travel dates to find the best prices.
Cheapest flights from London to San Juan
Explore the most affordable flight options available from London to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 November 2025.
Thu 11/1207:25LHR - SJU
1 stop18h 29mJetBlue
Thu 15/111:06SJU - LHR
1 stop18h 24mJetBlue
Deal found 26/11£602
Thu 11/1207:00LGW - SJU
2 stops16h 55mMultiple Airlines
Thu 15/121:25SJU - LGW
2 stops20h 35mMultiple Airlines
Deal found 26/11£611
Tue 9/1210:40LGW - SJU
2 stops33h 33mMultiple Airlines
Fri 12/1211:05SJU - LGW
1 stop18h 55mMultiple Airlines
Deal found 25/11£638
Tue 9/1207:25LHR - SJU
1 stop15h 28mJetBlue
Fri 12/1219:50SJU - LHR
1 stop33h 40mJetBlue
Deal found 25/11£664
Wed 17/1209:20LHR - SJU
1 stop18h 34mJetBlue
Wed 25/215:05SJU - LHR
1 stop14h 25mJetBlue
Deal found 25/11£667
Wed 17/1209:20LHR - SJU
2 stops22h 28mIcelandair
Wed 25/206:10SJU - LHR
2 stops23h 20mIcelandair
Deal found 25/11£673
Sat 13/1209:20LHR - SJU
1 stop31h 24mJetBlue
Wed 14/119:15SJU - LHR
1 stop22h 25mJetBlue
Deal found 25/11£692
Thu 27/1114:00LGW - SJU
2 stops34h 27mMultiple Airlines
Thu 11/1211:38SJU - LGW
1 stop18h 22mMultiple Airlines
Deal found 26/11£714
Wed 26/1112:20LHR - SJU
1 stop17h 37mIcelandair
Mon 1/1204:20SJU - LHR
1 stop13h 20mIcelandair
Deal found 25/11£731
Thu 11/1209:20LHR - SJU
1 stop18h 34mJetBlue
Sun 28/1220:55SJU - LHR
1 stop32h 35mJetBlue
Deal found 26/11£744
Sat 6/1206:30STN - SJU
3 stops32h 03mMultiple Airlines
Sat 20/1218:09SJU - STN
2 stops25h 26mMultiple Airlines
Deal found 26/11£761
Thu 11/1207:25LHR - SJU
2 stops31h 10mIcelandair
Sun 28/1220:55SJU - LHR
1 stop32h 35mIcelandair
Deal found 26/11£764
Best flights from London to San Juan
Discover carefully curated flight deals from London to San Juan that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 27 November 2025.
Sat 7/221:00STN - SJU
2 stops46h 06mMultiple Airlines
Sun 15/218:10SJU - STN
1 stop15h 50mMultiple Airlines
Deal found 26/11£569
Mon 26/111:00LGW - SJU
2 stops30h 20mTAP AIR PORTUGAL
Wed 4/211:06SJU - LGW
2 stops23h 59mTAP AIR PORTUGAL
Deal found 25/11£633
Mon 26/111:55LGW - SJU
2 stops26h 03mIcelandair
Thu 5/211:06SJU - LGW
2 stops19h 49mIcelandair
Deal found 26/11£650
Sat 14/213:35LHR - SJU
2 stops20h 36mUnited Airlines
Fri 27/202:05SJU - LHR
1 stop14h 30mUnited Airlines
Deal found 26/11£856
Mon 26/119:15LCY - SJU
1 stop28h 40mIberia
Thu 5/221:25SJU - LCY
1 stop31h 25mIberia
Deal found 25/11£867
Mon 26/109:50LCY - SJU
2 stops18h 46mLufthansa
Thu 5/207:45SJU - LCY
2 stops29h 55mLufthansa
Deal found 25/11£870
Sat 20/1212:20LHR - SJU
1 stop17h 39mJetBlue
Sat 3/111:40SJU - LHR
1 stop17h 50mJetBlue
Deal found 25/11£874
Wed 11/205:55STN - SJU
1 stop14h 40mMultiple Airlines
Wed 25/207:10SJU - STN
2 stops20h 40mMultiple Airlines
Deal found 25/11£570
Mon 26/110:40LGW - SJU
2 stops27h 36mTAP AIR PORTUGAL
Thu 5/211:06SJU - LGW
2 stops24h 44mTAP AIR PORTUGAL
Deal found 25/11£638
Wed 11/208:35LGW - SJU
2 stops34h 45mMultiple Airlines
Wed 25/210:52SJU - LGW
2 stops20h 03mMultiple Airlines
Deal found 25/11£584
Sat 17/106:00LHR - SJU
2 stops20h 55mTAP AIR PORTUGAL
Wed 28/111:06SJU - LHR
2 stops26h 24mTAP AIR PORTUGAL
Deal found 24/11£641
Tue 24/214:30STN - SJU
1 stop30h 05mMultiple Airlines
Wed 4/316:55SJU - STN
2 stops24h 00mMultiple Airlines
Deal found 25/11£598
Sun 1/312:25LHR - SJU
2 stops19h 25mTAP AIR PORTUGAL
Sun 15/316:20SJU - LHR
2 stops21h 10mTAP AIR PORTUGAL
Deal found 26/11£658
Sat 7/219:35LGW - SJU
2 stops25h 00mMultiple Airlines
Sun 15/218:10SJU - LGW
2 stops17h 35mMultiple Airlines
Deal found 26/11£601
Fri 27/308:05LHR - SJU
2 stops19h 18mIcelandair
Mon 6/419:40SJU - LHR
1 stop20h 05mIcelandair
Deal found 26/11£821
Tue 17/207:30LHR - SJU
2 stops18h 52mUnited Airlines
Mon 23/202:05SJU - LHR
1 stop15h 15mUnited Airlines
Deal found 24/11£879
Thu 11/1207:00LGW - SJU
2 stops16h 55mMultiple Airlines
Thu 15/121:25SJU - LGW
2 stops20h 35mMultiple Airlines
Deal found 26/11£611
Tue 17/219:15LCY - SJU
1 stop25h 20mIberia
Tue 24/221:25SJU - LCY
1 stop12h 40mIberia
Deal found 24/11£898
Wed 14/106:30LHR - SJU
2 stops19h 52mUnited Airlines
Sun 25/102:05SJU - LHR
1 stop15h 15mUnited Airlines
Deal found 25/11£879
Sat 17/121:00STN - SJU
2 stops43h 42mMultiple Airlines
Wed 28/121:25SJU - STN
1 stop12h 45mMultiple Airlines
Deal found 24/11£616
Fri 6/217:00LGW - SJU
2 stops22h 35mMultiple Airlines
Wed 11/206:00SJU - LGW
2 stops20h 00mMultiple Airlines
Deal found 25/11£622
Sat 13/1212:25LHR - SJU
2 stops18h 52mTAP AIR PORTUGAL
Wed 14/111:06SJU - LHR
2 stops24h 24mTAP AIR PORTUGAL
Deal found 25/11£875
Wed 25/214:15STN - SJU
3 stops32h 43mMultiple Airlines
Fri 6/311:52SJU - STN
3 stops32h 03mMultiple Airlines
Deal found 26/11£625
Sun 15/213:00LGW - SJU
1 stop32h 54mMultiple Airlines
Sun 1/308:40SJU - LGW
1 stop17h 20mMultiple Airlines
Deal found 26/11£630
Sat 21/221:00STN - SJU
2 stops32h 42mMultiple Airlines
Sun 8/318:10SJU - STN
1 stop15h 50mMultiple Airlines
Deal found 26/11£630
Sat 7/211:55LGW - SJU
3 stops31h 40mMultiple Airlines
Wed 11/206:00SJU - LGW
3 stops24h 55mMultiple Airlines
Deal found 25/11£633
Wed 4/211:55LGW - SJU
3 stops31h 40mMultiple Airlines
Wed 18/205:20SJU - LGW
3 stops25h 35mMultiple Airlines
Deal found 25/11£636
Sat 17/116:55LGW - SJU
2 stops27h 40mMultiple Airlines
Wed 28/118:10SJU - LGW
2 stops17h 00mMultiple Airlines
Deal found 24/11£644
Wed 4/205:55STN - SJU
1 stop14h 40mMultiple Airlines
Wed 18/221:25SJU - STN
1 stop12h 45mMultiple Airlines
Deal found 25/11£645
Sat 7/214:40STN - SJU
2 stops30h 25mMultiple Airlines
Wed 11/216:45SJU - STN
2 stops22h 55mMultiple Airlines
Deal found 25/11£645
Last-minute flights from London to San Juan
Discover last-minute flight deals from London to San Juan. Data last updated 27 November 2025 and is based on user searches.
Wed 26/1112:20LHR - SJU
1 stop17h 37mIcelandair
Mon 1/1204:20SJU - LHR
1 stop13h 20mIcelandair
Deal found 25/11£731
Thu 27/1114:00LGW - SJU
2 stops34h 27mMultiple Airlines
Thu 11/1211:38SJU - LGW
1 stop18h 22mMultiple Airlines
Deal found 26/11£714
Sat 6/1206:30STN - SJU
3 stops32h 03mMultiple Airlines
Sat 20/1218:09SJU - STN
2 stops25h 26mMultiple Airlines
Deal found 26/11£761
Tue 9/1210:40LGW - SJU
2 stops33h 33mMultiple Airlines
Fri 12/1211:05SJU - LGW
1 stop18h 55mMultiple Airlines
Deal found 25/11£638
Tue 9/1207:25LHR - SJU
1 stop15h 28mJetBlue
Fri 12/1219:50SJU - LHR
1 stop33h 40mJetBlue
Deal found 25/11£664
Thu 11/1207:25LHR - SJU
1 stop18h 29mJetBlue
Thu 15/111:06SJU - LHR
1 stop18h 24mJetBlue
Deal found 26/11£602
Thu 11/1207:00LGW - SJU
2 stops16h 55mMultiple Airlines
Thu 15/121:25SJU - LGW
2 stops20h 35mMultiple Airlines
Deal found 26/11£611
Thu 11/1209:20LHR - SJU
1 stop18h 34mJetBlue
Sun 28/1220:55SJU - LHR
1 stop32h 35mJetBlue
Deal found 26/11£744
Thu 11/1207:25LHR - SJU
2 stops31h 10mIcelandair
Sun 28/1220:55SJU - LHR
1 stop32h 35mIcelandair
Deal found 26/11£764
Sat 13/1209:20LHR - SJU
1 stop31h 24mJetBlue
Wed 14/119:15SJU - LHR
1 stop22h 25mJetBlue
Deal found 25/11£692
Wed 17/1209:20LHR - SJU
1 stop18h 34mJetBlue
Wed 25/215:05SJU - LHR
1 stop14h 25mJetBlue
Deal found 25/11£667
Wed 17/1209:20LHR - SJU
2 stops22h 28mIcelandair
Wed 25/223:59SJU - LHR
1 stop17h 41mIcelandair
Deal found 25/11£673
One-way flights from London to San Juan
Search for one-way flight options from London to San Juan. Find affordable one-way fares based on user searches. Data last updated 27 November 2025.
Wed 4/313:10LGW - SJU
3 stops40h 32mMultiple Airlines
Deal found 25/11£265
Thu 11/1208:30STN - SJU
3 stops43h 46mMultiple Airlines
Deal found 26/11£296
Wed 4/309:55LHR - SJU
3 stops38h 00mMultiple Airlines
Deal found 25/11£302
Wed 4/320:40STN - SJU
2 stops24h 25mMultiple Airlines
Deal found 25/11£316
Sun 18/107:45LHR - SJU
1 stop20h 05mJetBlue
Deal found 24/11£321
Wed 10/1220:55STN - SJU
3 stops55h 21mMultiple Airlines
Deal found 26/11£322
Thu 11/1212:45LGW - SJU
3 stops39h 31mMultiple Airlines
Deal found 26/11£335
Sun 18/110:45LHR - SJU
2 stops49h 20mMultiple Airlines
Deal found 24/11£338
Wed 10/1216:00LGW - SJU
3 stops59h 14mMultiple Airlines
Deal found 26/11£347
Fri 2/108:05STN - SJU
2 stops39h 50mMultiple Airlines
Deal found 26/11£354
Fri 13/205:55STN - SJU
3 stops23h 47mMultiple Airlines
Deal found 26/11£358
Wed 4/307:00SEN - SJU
3 stops32h 35mMultiple Airlines
Deal found 25/11£358
Cheap flight deals from London to San Juan
Discover tips and strategies to find the most affordable flight options for your journey from London (LON) 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 27 November 2025.
Customise your flight search to find flights from London 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 27 November 2025.
Use the filters below to find and compare flights from London to San Juan that are best for you.
Fly from
London
Fly to
San Juan
Route
Depart
Return
Price
LondonSan Juan
STN - SJU
STNSJU
London Stansted
Sat 7/2
21:00-15:06
2 stops46h 06m
San Juan Luis Munoz Marin Intl
Sun 15/2
18:10-14:00
1 stop15h 50m
£569
LondonSan Juan
STN - SJU
STNSJU
London Stansted
Wed 11/2
05:55-16:35
1 stop14h 40m
San Juan Luis Munoz Marin Intl
Wed 25/2
07:10-07:50
2 stops20h 40m
£570
LondonSan Juan
LGW - SJU
LGWSJU
London Gatwick
Wed 11/2
08:35-15:20
2 stops34h 45m
San Juan Luis Munoz Marin Intl
Wed 25/2
10:52-10:55
2 stops20h 03m
£584
LondonSan Juan
STN - SJU
STNSJU
London Stansted
Tue 24/2
14:30-16:35
1 stop30h 05m
San Juan Luis Munoz Marin Intl
Wed 4/3
16:55-20:55
2 stops24h 00m
£598
LondonSan Juan
LGW - SJU
LGWSJU
London Gatwick
Sat 7/2
19:35-16:35
2 stops25h 00m
San Juan Luis Munoz Marin Intl
Sun 15/2
18:10-15:45
2 stops17h 35m
£601
LondonSan Juan
LGW - SJU
LGWSJU
London Gatwick
Thu 11/12
07:00-19:55
2 stops16h 55m
San Juan Luis Munoz Marin Intl
Thu 15/1
21:25-22:00
2 stops20h 35m
£611
LondonSan Juan
STN - SJU
STNSJU
London Stansted
Sat 17/1
21:00-12:42
2 stops43h 42m
San Juan Luis Munoz Marin Intl
Wed 28/1
21:25-14:10
1 stop12h 45m
£616
LondonSan Juan
LGW - SJU
LGWSJU
London Gatwick
Fri 6/2
17:00-11:35
2 stops22h 35m
San Juan Luis Munoz Marin Intl
Wed 11/2
06:00-06:00
2 stops20h 00m
£622
LondonSan Juan
STN - SJU
STNSJU
London Stansted
Wed 25/2
14:15-18:58
3 stops32h 43m
San Juan Luis Munoz Marin Intl
Fri 6/3
11:52-23:55
3 stops32h 03m
£625
LondonSan Juan
LGW - SJU
LGWSJU
London Gatwick
Sun 15/2
13:00-17:54
1 stop32h 54m
San Juan Luis Munoz Marin Intl
Sun 1/3
08:40-06:00
1 stop17h 20m
£630
Flights are sorted by cheapest return flights first.
Deals found on 25/11
Showing 1-10 of 60 results
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Best time to book a flight from London to San Juan
Have a flexible travel schedule? Discover the best time to fly to San Juan from London 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 to San Juan
How far ahead should I book a flight from London to San Juan?
Use this chart to determine the optimal time to book a return flight from London to San Juan. Price data was last updated on 21 November 2025.
Booking 56 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to San Juan. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from London to San Juan?
Currently, July is the cheapest month in which you can book a flight from London to San Juan (average of £430). Flying from London to San Juan in December is currently the most expensive (average of £539). 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 LON to SJU?
Find hourly flight availability from London 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 27 November 2025.
It’s optimal to fly from London to San Juan in the evening. By choosing this option you can save up to 24% on the cost of your flight, compared to a flight in the morning.
How much does it cost for a return flight from London to San Juan?
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 27 November 2025.
Read through reviews of airlines operating flights from London to San Juan, such as Finnair, JetBlue, andIcelandair. Reviews also offer insight into each airline's 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 London 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 to San Juan?
Airlines like TAP AIR PORTUGAL fly from London to San Juan in about 20h 55m. The time it takes to get you to your destination can typically vary by up to . The distance between London and San Juan is about 4179 mi.
What are the cheapest airlines flying from London to San Juan round-trip?
Cheapflights users have booked flights from London to San Juan round-trip from £338. Other airlines that can offer you cheap pricing are Finnair, from £457, and JetBlue, from £459. Virgin Atlantic is priced at 50% lower than the current average price of a flight leaving 3 months from now.
What are the most popular routes from London to San Juan?
The most popular route from London to San Juan is London Heathrow - San Juan Luis Munoz Marin Intl. You may also consider London Gatwick - San Juan Luis Munoz Marin Intl or London City - San Juan Luis Munoz Marin Intl.
Where are the most common stopover locations when flying from London to San Juan?
The most popular stopover on flights from London to San Juan is Madrid.
What are some popular things to do or see while on a stopover in Madrid?
Spain Building, Puerta del Sol, and Plaza Mayor are the most popular attractions in Madrid if you're in need of something to do during your stopover. Spain Building, Puerta del Sol and Plaza Mayor are located about 8.5 mi, 8.4 mi, and 8.6 mi, respectively from Madrid Barajas if you are interested in checking them out. Those on a stopover in Madrid in need of a car hire can book one at Madrid Barajas for about £20.
Where are the least popular stopover locations for London to San Juan flights?
London to San Juan flights that have stopovers will least frequently stop in New York.
Can I find deals for flights from London to San Juan that include hotel bookings?
Yes. In addition to deals on London to San Juan flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London to San Juan?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to San Juan.
Can I find deals for business class flights from London to San Juan?
Yes. Cheapflights offers flight deals from London 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 to San Juan?
Currently, July is the cheapest month in which you can book a flight from London to San Juan (average of £430). Flying from London to San Juan in December is currently the most expensive (average of £539). 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.
Discover the top 6 airlines that operate flights from London 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 27 November 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 London to San Juan?
Cheapflights helps you search for flights from London 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 London to San Juan?
It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from London to San Juan.
Can Cheapflights find flights from London to San Juan with no change fees?
Yes, we can. To see specific flights from London to San Juan with no change fees, users can toggle flexible booking options after using the search form above to find flights.
Can Cheapflights notify me if prices for flights from London to San Juan become cheaper?
Not ready to book yet? You can track prices for flights from London to San Juan on Cheapflights with our Price Alert feature and get notified when better prices are available.
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