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 24/11. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SJU
7 Dec — 14 Dec1
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 7 November 2025.
Wed 3/1207:25LHR - SJU
1 stop15h 28mJetBlue
Mon 8/1213:45SJU - LHR
1 stop15h 45mJetBlue
Deal found 6/11£531
Thu 20/1114:00LGW - SJU
1 stop16h 54mMultiple Airlines
Tue 25/1106:10SJU - LGW
2 stops19h 50mMultiple Airlines
Deal found 6/11£533
Tue 2/1207:25LHR - SJU
1 stop18h 29mJetBlue
Mon 8/1210:00SJU - LHR
1 stop19h 30mJetBlue
Deal found 6/11£538
Thu 4/1209:20LHR - SJU
1 stop18h 34mJetBlue
Wed 10/1205:09SJU - LHR
1 stop12h 31mJetBlue
Deal found 6/11£547
Sat 6/1214:00LGW - SJU
1 stop14h 16mMultiple Airlines
Fri 12/1203:55SJU - LGW
1 stop26h 10mMultiple Airlines
Deal found 6/11£548
Wed 3/1207:25LHR - SJU
1 stop15h 28mJetBlue
Sat 13/1205:10SJU - LHR
1 stop12h 50mJetBlue
Deal found 5/11£550
Fri 5/1214:00LGW - SJU
2 stops26h 32mMultiple Airlines
Fri 12/1211:38SJU - LGW
1 stop18h 22mMultiple Airlines
Deal found 5/11£553
Tue 2/1207:25LHR - SJU
1 stop18h 29mJetBlue
Sat 13/1205:10SJU - LHR
1 stop12h 50mJetBlue
Deal found 5/11£554
Thu 20/1112:20LHR - SJU
1 stop15h 28mJetBlue
Mon 24/1101:59SJU - LHR
1 stop15h 41mJetBlue
Deal found 6/11£558
Fri 28/1108:05LHR - SJU
1 stop19h 43mJetBlue
Wed 10/1205:09SJU - LHR
1 stop12h 31mJetBlue
Deal found 6/11£558
Thu 4/1209:20LHR - SJU
1 stop18h 34mJetBlue
Thu 11/1213:41SJU - LHR
1 stop13h 14mJetBlue
Deal found 6/11£560
Fri 28/1108:05LHR - SJU
1 stop19h 43mJetBlue
Thu 11/1213:41SJU - LHR
1 stop13h 14mJetBlue
Deal found 6/11£567
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 7 November 2025.
Fri 16/114:00LGW - SJU
2 stops29h 02mMultiple Airlines
Sat 24/106:00SJU - LGW
1 stop24h 05mMultiple Airlines
Deal found 5/11£539
Sat 31/108:05LHR - SJU
1 stop19h 50mIcelandair
Mon 9/208:15SJU - LHR
2 stops18h 40mIcelandair
Deal found 7/11£554
Sat 17/109:20LHR - SJU
1 stop20h 02mJetBlue
Sat 24/106:00SJU - LHR
1 stop12h 00mJetBlue
Deal found 5/11£569
Mon 26/111:00LGW - SJU
2 stops30h 48mTAP AIR PORTUGAL
Thu 5/206:15SJU - LGW
2 stops23h 35mTAP AIR PORTUGAL
Deal found 6/11£634
Mon 26/109:10LCY - SJU
1 stop14h 45mBritish Airways
Thu 5/221:25SJU - LCY
1 stop12h 40mBritish Airways
Deal found 6/11£928
Thu 11/1207:50LCY - SJU
1 stop16h 05mIberia
Wed 17/1221:25SJU - LCY
1 stop12h 40mIberia
Deal found 5/11£938
Mon 26/109:50LCY - SJU
2 stops18h 46mLufthansa
Thu 5/214:15SJU - LCY
2 stops23h 25mLufthansa
Deal found 5/11£965
Thu 8/114:00LGW - SJU
1 stop23h 55mMultiple Airlines
Thu 22/111:05SJU - LGW
1 stop18h 55mMultiple Airlines
Deal found 6/11£555
Wed 3/1207:25LHR - SJU
1 stop15h 28mJetBlue
Sun 7/1210:00SJU - LHR
1 stop19h 30mJetBlue
Deal found 6/11£586
Thu 11/1209:20LHR - SJU
2 stops22h 28mIcelandair
Wed 17/1213:41SJU - LHR
1 stop13h 14mIcelandair
Deal found 5/11£629
Mon 26/108:15LHR - SJU
2 stops30h 01mTAP AIR PORTUGAL
Thu 5/211:15SJU - LHR
2 stops26h 15mTAP AIR PORTUGAL
Deal found 6/11£643
Thu 11/1214:00LGW - SJU
1 stop24h 33mMultiple Airlines
Sun 14/1211:38SJU - LGW
1 stop18h 22mMultiple Airlines
Deal found 6/11£606
Thu 4/1209:20LHR - SJU
1 stop18h 34mJetBlue
Sun 7/1210:00SJU - LHR
1 stop19h 30mJetBlue
Deal found 6/11£622
Sun 11/114:10LGW - SJU
1 stop23h 37mMultiple Airlines
Thu 15/117:50SJU - LGW
2 stops22h 50mMultiple Airlines
Deal found 6/11£612
Sat 7/216:35LGW - SJU
2 stops36h 47mTAP AIR PORTUGAL
Sat 14/206:00SJU - LGW
2 stops34h 40mTAP AIR PORTUGAL
Deal found 6/11£678
Wed 3/1219:25LGW - SJU
2 stops43h 07mMultiple Airlines
Sat 13/1213:32SJU - LGW
1 stop16h 33mMultiple Airlines
Deal found 5/11£643
Fri 26/1212:20LHR - SJU
1 stop17h 39mJetBlue
Thu 8/105:01SJU - LHR
1 stop12h 39mJetBlue
Deal found 5/11£735
Sat 10/112:25LHR - SJU
2 stops25h 51mTAP AIR PORTUGAL
Thu 15/114:00SJU - LHR
2 stops23h 30mTAP AIR PORTUGAL
Deal found 6/11£736
Mon 26/109:10LCY - SJU
1 stop14h 45mIberia
Thu 5/211:38SJU - LCY
2 stops17h 12mIberia
Deal found 6/11£947
Thu 20/1114:00LGW - SJU
2 stops34h 27mMultiple Airlines
Tue 25/1108:00SJU - LGW
2 stops30h 35mMultiple Airlines
Deal found 6/11£655
Wed 3/1206:50LCY - SJU
2 stops21h 02mBritish Airways
Sat 13/1216:50SJU - LCY
2 stops17h 00mBritish Airways
Deal found 5/11£1,006
Sun 28/1207:45LHR - SJU
1 stop23h 14mJetBlue
Fri 9/120:15SJU - LHR
1 stop21h 45mJetBlue
Deal found 6/11£788
Thu 11/1207:50LCY - SJU
1 stop16h 05mIberia
Sun 14/1218:10SJU - LCY
1 stop16h 25mIberia
Deal found 6/11£983
Mon 1/1214:00LGW - SJU
1 stop24h 49mMultiple Airlines
Sat 13/1213:32SJU - LGW
1 stop16h 33mMultiple Airlines
Deal found 5/11£685
Sun 28/1207:45LHR - SJU
1 stop15h 04mJetBlue
Thu 8/105:01SJU - LHR
1 stop12h 39mJetBlue
Deal found 5/11£789
Thu 29/107:50LCY - SJU
1 stop16h 05mIberia
Sun 1/221:25SJU - LCY
1 stop13h 10mIberia
Deal found 6/11£996
Thu 11/1208:30STN - SJU
3 stops22h 47mMultiple Airlines
Sun 14/1216:45SJU - STN
2 stops22h 45mMultiple Airlines
Deal found 6/11£713
Thu 25/1212:20LHR - SJU
1 stop17h 39mJetBlue
Thu 8/105:01SJU - LHR
1 stop12h 39mJetBlue
Deal found 5/11£789
Fri 12/1207:50LCY - SJU
1 stop12h 45mIberia
Wed 17/1221:25SJU - LCY
1 stop12h 40mIberia
Deal found 5/11£1,003
Sun 29/321:10STN - SJU
3 stops43h 45mMultiple Airlines
Tue 7/413:15SJU - STN
2 stops23h 10mMultiple Airlines
Deal found 6/11£719
Last-minute flights from London to San Juan
Discover last-minute flight deals from London to San Juan. Data last updated 7 November 2025 and is based on user searches.
Thu 20/1114:00LGW - SJU
1 stop16h 54mMultiple Airlines
Tue 25/1106:10SJU - LGW
2 stops19h 50mMultiple Airlines
Deal found 6/11£533
Thu 20/1112:20LHR - SJU
1 stop15h 28mJetBlue
Tue 25/1105:01SJU - LHR
1 stop12h 39mJetBlue
Deal found 6/11£558
Fri 28/1108:05LHR - SJU
1 stop19h 43mJetBlue
Wed 10/1205:09SJU - LHR
1 stop12h 31mJetBlue
Deal found 6/11£558
Fri 28/1108:05LHR - SJU
1 stop19h 43mJetBlue
Thu 11/1213:41SJU - LHR
1 stop13h 14mJetBlue
Deal found 6/11£567
Tue 2/1207:25LHR - SJU
1 stop18h 29mJetBlue
Mon 8/1210:00SJU - LHR
1 stop19h 30mJetBlue
Deal found 6/11£538
Tue 2/1207:25LHR - SJU
1 stop18h 29mJetBlue
Sat 13/1205:10SJU - LHR
1 stop12h 50mJetBlue
Deal found 5/11£554
Wed 3/1207:25LHR - SJU
1 stop15h 28mJetBlue
Mon 8/1213:45SJU - LHR
1 stop15h 45mJetBlue
Deal found 6/11£531
Wed 3/1207:25LHR - SJU
1 stop15h 28mJetBlue
Sat 13/1205:10SJU - LHR
1 stop12h 50mJetBlue
Deal found 5/11£550
Thu 4/1209:20LHR - SJU
1 stop18h 34mJetBlue
Wed 10/1205:09SJU - LHR
1 stop12h 31mJetBlue
Deal found 6/11£547
Thu 4/1209:20LHR - SJU
1 stop18h 34mJetBlue
Thu 11/1213:41SJU - LHR
1 stop13h 14mJetBlue
Deal found 6/11£560
Fri 5/1214:00LGW - SJU
2 stops26h 32mMultiple Airlines
Fri 12/1211:38SJU - LGW
1 stop18h 22mMultiple Airlines
Deal found 5/11£553
Sat 6/1214:00LGW - SJU
1 stop14h 16mMultiple Airlines
Fri 12/1203:55SJU - LGW
1 stop26h 10mMultiple Airlines
Deal found 6/11£548
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 7 November 2025.
Mon 24/1114:00LGW - SJU
1 stop16h 54mMultiple Airlines
Deal found 6/11£311
Mon 24/1115:15LHR - SJU
2 stops46h 25mMultiple Airlines
Deal found 4/11£356
Mon 24/1107:15SEN - SJU
3 stops35h 45mMultiple Airlines
Deal found 4/11£365
Sun 11/115:15LHR - SJU
3 stops38h 27mMultiple Airlines
Deal found 6/11£365
Sun 23/1118:05SEN - SJU
3 stops48h 55mMultiple Airlines
Deal found 4/11£374
Sat 15/1118:55STN - SJU
3 stops34h 37mMultiple Airlines
Deal found 6/11£377
Sun 23/1106:15STN - SJU
2 stops37h 40mMultiple Airlines
Deal found 4/11£380
Tue 25/1108:15LGW - SJU
3 stops44h 57mMultiple Airlines
Deal found 4/11£385
Sun 23/1106:10LGW - SJU
3 stops31h 30mMultiple Airlines
Deal found 4/11£389
Tue 16/1207:40STN - SJU
3 stops40h 20mMultiple Airlines
Deal found 5/11£405
Sat 15/1121:05LGW - SJU
3 stops32h 27mMultiple Airlines
Deal found 6/11£411
Tue 16/1206:55LGW - SJU
3 stops39h 28mMultiple Airlines
Deal found 5/11£415
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 7 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 7 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
LGW - SJU
LGWSJU
London Gatwick
Fri 16/1
14:00-15:02
2 stops29h 02m
San Juan Luis Munoz Marin Intl
Sat 24/1
06:00-10:05
1 stop24h 05m
£539
LondonSan Juan
LHR - SJU
LHRSJU
London Heathrow
Sat 31/1
08:05-23:55
1 stop19h 50m
San Juan Luis Munoz Marin Intl
Mon 9/2
08:15-06:55
2 stops18h 40m
£554
LondonSan Juan
LGW - SJU
LGWSJU
London Gatwick
Thu 8/1
14:00-09:55
1 stop23h 55m
San Juan Luis Munoz Marin Intl
Thu 22/1
11:05-10:00
1 stop18h 55m
£555
LondonSan Juan
LHR - SJU
LHRSJU
London Heathrow
Sat 17/1
09:20-01:22
1 stop20h 02m
San Juan Luis Munoz Marin Intl
Sat 24/1
06:00-22:00
1 stop12h 00m
£569
LondonSan Juan
LHR - SJU
LHRSJU
London Heathrow
Wed 3/12
07:25-18:53
1 stop15h 28m
San Juan Luis Munoz Marin Intl
Sun 7/12
10:00-09:30
1 stop19h 30m
£586
LondonSan Juan
LGW - SJU
LGWSJU
London Gatwick
Thu 11/12
14:00-10:33
1 stop24h 33m
San Juan Luis Munoz Marin Intl
Sun 14/12
11:38-10:00
1 stop18h 22m
£606
LondonSan Juan
LGW - SJU
LGWSJU
London Gatwick
Sun 11/1
14:10-09:47
1 stop23h 37m
San Juan Luis Munoz Marin Intl
Thu 15/1
17:50-20:40
2 stops22h 50m
£612
LondonSan Juan
LHR - SJU
LHRSJU
London Heathrow
Thu 4/12
09:20-23:54
1 stop18h 34m
San Juan Luis Munoz Marin Intl
Sun 7/12
10:00-09:30
1 stop19h 30m
£622
LondonSan Juan
LHR - SJU
LHRSJU
London Heathrow
Thu 11/12
09:20-03:48
2 stops22h 28m
San Juan Luis Munoz Marin Intl
Wed 17/12
13:41-06:55
1 stop13h 14m
£629
LondonSan Juan
LGW - SJU
LGWSJU
London Gatwick
Mon 26/1
11:00-13:48
2 stops30h 48m
San Juan Luis Munoz Marin Intl
Thu 5/2
06:15-09:50
2 stops23h 35m
£634
Flights are sorted by cheapest return flights first.
Deals found on 6/11
Showing 1-10 of 60 results
1
2
3
...
6
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 31 October 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 £434). Flying from London to San Juan in December is currently the most expensive (average of £548). 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 7 November 2025.
It’s optimal to fly from London to San Juan in the evening. By choosing this option you can save up to 29% on the cost of your flight, compared to 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 7 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 Icelandair, JetBlue, and British Airways fly from London to San Juan in about 14h 45m. The time it takes to get you to your destination can typically vary by up to 5h 17m. The distance between London and San Juan is about 4201 mi. This flight may include one or multiple stops.
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 £341. Other airlines that can offer you cheap pricing are JetBlue, from £454, and Finnair, from £461. 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 £24.
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 £434). Flying from London to San Juan in December is currently the most expensive (average of £548). 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 7 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.
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
We value your privacy
Cheapflights and its partners wish to use cookies or similar technologies to store and/or access information on and about your device and process personal data such as your IP address, device identifiers etc., in order to improve your experience on the site, to analyse navigation, to offer and measure personalised advertising, and to facilitate sharing on social networks. We also allow the use of third-party cookies (including those from our advertising partners) on our sites.
By clicking 'Accept', you consent to your data being processed by 0 vendors on this web site for the purposes described in this notice. You can review the vendors and their individual processing purposes on the .
To review individual processing purposes and cookie categories, please click ’Select individual purposes’. You can review your choices and withdraw your consent at any time by clicking the ’Privacy Preferences’ link in the page side navigation.