How long is the flight from London to San Juan?

Airlines like JetBlue fly from London to San Juan in about 18h 13m. 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 £340. Other airlines that can offer you cheap pricing are JetBlue, from £439, and Icelandair, from £444. Virgin Atlantic is priced at 48% lower than the current average price of a flight leaving 3 months from now.

What is the cheapest day to fly from London to San Juan?

Travellers seeking maximum savings on their London to San Juan flight should consider departing on Monday mornings when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in San Juan ranges from 55.0 - 156.0 inches per month. November is typically the wettest month, when rainfall can reach 156.0 mm. March is typically the driest time to visit San Juan when rainfall is around 55.0 mm.

If weather is an important factor for your trip to San Juan, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 28.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 25.0 C).

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.

What are the most popular airlines that fly from London to San Juan?

When booking a flight from London to San Juan, you may want to consider flying on Finnair, JetBlue or British Airways as they are the most popular for this route.

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.

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.

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.

What is the cheapest day to fly round-trip from London to San Juan?

Flying to your destination on a Friday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to San Juan. Check prices with Cheapflights to find a great deal for your trip.

How far in advance should I book a flight from London to San Juan?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 57 days in advance, which can save you up to 58% on flights from London to San Juan compared to booking the week you need them. Waiting 57 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £475. For sooner than that we have options available in the next 3 days from £789.

What is the cheapest month to fly from London to San Juan?

September is one of the best times of the year to fly to San Juan from London. Prices for September average £664 per person but you can even find prices for as low as £435. The most expensive prices can be found in the month of July. Opting for a September flight can save you 38% on your journey compared to booking in July

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.

£277+ Cheap Flights from London to San Juan

Q: How much does it cost for a return flight from London to San Juan?

Airfare is typical for this route at the moment. London to San Juan flights typically cost between £489 and £589 in February. The cheapest return flight price found within the last 3 days was £489 on Iberia (3 Feb-9 Feb).

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

Cheap flight deals from London to San Juan

Round-trip from	£489
One-way from	£277
Popular in	July
Cheapest in	September
Average price	£536

Iberia
3/2-9/2
2 total stops
27h 05m total
London to San Juan

Search Deals

7/11
1 total stop
31h 34m total
London to San Juan

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£71 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from London to San Juan

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 16 September 2025.

Tue 14/1014:00LGW - SJU

1 stop16h 44mMultiple Airlines

Mon 20/1002:49SJU - LGW

1 stop26h 11mMultiple Airlines

Deal found 14/9£500

Wed 3/1212:20LHR - SJU

1 stop19h 28mJetBlue

Tue 9/1213:41SJU - LHR

1 stop13h 14mJetBlue

Deal found 14/9£508

Mon 24/1112:20LHR - SJU

1 stop17h 37mJetBlue

Sat 6/1215:40SJU - LHR

1 stop13h 50mJetBlue

Deal found 15/9£512

Wed 29/1013:00LGW - SJU

2 stops29h 19mMultiple Airlines

Wed 5/1109:00SJU - LGW

1 stop17h 00mMultiple Airlines

Deal found 14/9£514

Wed 5/1113:00LGW - SJU

2 stops36h 24mMultiple Airlines

Fri 14/1109:00SJU - LGW

1 stop17h 00mMultiple Airlines

Deal found 15/9£517

Mon 13/1022:05LHR - SJU

1 stop23h 45mAvianca

Mon 20/1018:15SJU - LHR

1 stop16h 20mAvianca

Deal found 15/9£517

Tue 2/1207:25LHR - SJU

1 stop18h 29mJetBlue

Wed 10/1213:41SJU - LHR

1 stop13h 14mJetBlue

Deal found 14/9£519

Mon 1/1208:05LHR - SJU

1 stop20h 50mJetBlue

Mon 8/1219:48SJU - LHR

1 stop21h 52mJetBlue

Deal found 14/9£520

Wed 26/1112:20LHR - SJU

1 stop19h 28mJetBlue

Sat 6/1215:40SJU - LHR

1 stop13h 50mJetBlue

Deal found 15/9£522

Sun 23/1112:20LHR - SJU

1 stop17h 37mJetBlue

Tue 9/1213:41SJU - LHR

1 stop13h 14mJetBlue

Deal found 15/9£530

Thu 27/1114:00LGW - SJU

1 stop16h 54mMultiple Airlines

Fri 5/1211:05SJU - LGW

1 stop18h 55mMultiple Airlines

Deal found 15/9£533

Sun 23/1112:20LHR - SJU

1 stop17h 37mJetBlue

Sat 6/1215:40SJU - LHR

1 stop13h 50mJetBlue

Deal found 15/9£533

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 16 September 2025.

Tue 14/1014:00LGW - SJU

1 stop16h 44mMultiple Airlines

Mon 20/1002:49SJU - LGW

1 stop26h 11mMultiple Airlines

Deal found 14/9£500

Mon 2/212:20LHR - SJU

1 stop18h 13mJetBlue

Wed 11/201:59SJU - LHR

1 stop14h 46mJetBlue

Deal found 14/9£508

Fri 17/1008:25LHR - SJU

1 stop33h 24mIcelandair

Sun 26/1007:00SJU - LHR

2 stops19h 55mIcelandair

Deal found 15/9£592

Thu 6/1116:00LGW - SJU

2 stops39h 17mTAP AIR PORTUGAL

Sat 15/1109:20SJU - LGW

2 stops31h 20mTAP AIR PORTUGAL

Deal found 14/9£592

Tue 10/309:10LCY - SJU

1 stop14h 45mIberia

Thu 12/317:45SJU - LCY

2 stops35h 05mIberia

Deal found 14/9£873

Wed 5/1113:00LGW - SJU

2 stops36h 24mMultiple Airlines

Fri 14/1109:00SJU - LGW

1 stop17h 00mMultiple Airlines

Deal found 15/9£517

Tue 9/1212:20LHR - SJU

1 stop19h 28mJetBlue

Tue 16/1213:41SJU - LHR

1 stop13h 14mJetBlue

Deal found 14/9£519

Wed 10/1209:20LHR - SJU

1 stop18h 34mJetBlue

Tue 16/1213:41SJU - LHR

1 stop13h 14mJetBlue

Deal found 14/9£519

Thu 27/1114:00LGW - SJU

1 stop16h 54mMultiple Airlines

Fri 5/1211:05SJU - LGW

1 stop18h 55mMultiple Airlines

Deal found 15/9£533

Fri 7/1110:40LGW - SJU

2 stops20h 37mTAP AIR PORTUGAL

Sat 15/1109:20SJU - LGW

2 stops31h 20mTAP AIR PORTUGAL

Deal found 14/9£600

Wed 26/1112:20LHR - SJU

1 stop19h 28mJetBlue

Sat 6/1215:40SJU - LHR

1 stop13h 50mJetBlue

Deal found 15/9£522

Tue 11/1113:00LGW - SJU

1 stop32h 54mMultiple Airlines

Sat 22/1106:00SJU - LGW

2 stops44h 00mMultiple Airlines

Deal found 14/9£534

Last-minute flights from London to San Juan
Discover last-minute flight deals from London to San Juan. Data last updated 16 September 2025 and is based on user searches.

Sat 20/910:00LGW - SJU

2 stops20h 58mMultiple Airlines

Sat 27/921:26SJU - LGW

1 stop27h 54mMultiple Airlines

Deal found 14/9£552

Fri 3/1008:15LHR - SJU

1 stop18h 09mJetBlue

Fri 10/1021:25SJU - LHR

1 stop18h 20mJetBlue

Deal found 15/9£544

Mon 13/1022:05LHR - SJU

1 stop23h 45mAvianca

Mon 20/1018:15SJU - LHR

1 stop16h 20mAvianca

Deal found 15/9£517

Tue 14/1014:00LGW - SJU

1 stop16h 44mMultiple Airlines

Mon 20/1002:49SJU - LGW

1 stop26h 11mMultiple Airlines

Deal found 14/9£500

Fri 17/1008:25LHR - SJU

1 stop33h 24mJetBlue

Sun 26/1019:10SJU - LHR

1 stop31h 45mJetBlue

Deal found 14/9£571

Mon 20/1008:15LHR - SJU

1 stop13h 27mJetBlue

Tue 2/1215:46SJU - LHR

1 stop13h 44mJetBlue

Deal found 15/9£547

Fri 24/1008:25LHR - SJU

1 stop33h 24mJetBlue

Wed 29/1012:51SJU - LHR

1 stop14h 04mJetBlue

Deal found 15/9£548

Wed 29/1013:00LGW - SJU

2 stops29h 19mMultiple Airlines

Wed 5/1109:00SJU - LGW

1 stop17h 00mMultiple Airlines

Deal found 14/9£514

Wed 29/1021:40LHR - SJU

1 stop17h 55mAvianca

Thu 30/1018:30SJU - LHR

1 stop16h 05mAvianca

Deal found 14/9£542

Wed 29/1012:15LHR - SJU

2 stops18h 48mMultiple Airlines

Wed 5/1109:00SJU - LHR

2 stops21h 50mMultiple Airlines

Deal found 14/9£545

Fri 31/1007:25LHR - SJU

1 stop23h 23mJetBlue

Sun 2/1120:10SJU - LHR

1 stop30h 45mJetBlue

Deal found 15/9£537

Fri 31/1014:00LGW - SJU

1 stop15h 44mMultiple Airlines

Sun 2/1112:51SJU - LGW

3 stops27h 44mMultiple Airlines

Deal found 15/9£565

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 16 September 2025.

Fri 7/1114:00LGW - SJU

1 stop31h 34mMultiple Airlines

Deal found 14/9£277

Thu 5/221:20STN - SJU

2 stops32h 22mMultiple Airlines

Deal found 14/9£286

Fri 7/1115:00STN - SJU

3 stops40h 33mMultiple Airlines

Deal found 14/9£289

Thu 5/220:50LGW - SJU

2 stops32h 52mMultiple Airlines

Deal found 14/9£291

Fri 7/1108:05LHR - SJU

1 stop23h 43mJetBlue

Deal found 14/9£309

Tue 2/1213:00LGW - SJU

1 stop25h 54mMultiple Airlines

Deal found 15/9£315

Wed 22/1007:30STN - SJU

3 stops47h 14mMultiple Airlines

Deal found 13/9£321

Wed 22/1013:00LGW - SJU

3 stops41h 44mMultiple Airlines

Deal found 13/9£333

Wed 22/1017:30SEN - SJU

3 stops50h 54mMultiple Airlines

Deal found 13/9£338

Tue 2/1212:20LHR - SJU

1 stop19h 28mJetBlue

Deal found 15/9£339

Wed 22/1007:00LHR - SJU

3 stops24h 02mMultiple Airlines

Deal found 13/9£372

Thu 16/1007:45LHR - SJU

2 stops28h 20mMultiple Airlines

Deal found 14/9£382

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 14/10

14:00-01:44

1 stop16h 44m

San Juan Luis Munoz Marin Intl

Mon 20/10

02:49-10:00

1 stop26h 11m

£500

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 2/2

12:20-02:33

1 stop18h 13m

San Juan Luis Munoz Marin Intl

Wed 11/2

01:59-20:45

1 stop14h 46m

£508

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Wed 5/11

13:00-21:24

2 stops36h 24m

San Juan Luis Munoz Marin Intl

Fri 14/11

09:00-06:00

1 stop17h 00m

£517

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 9/12

12:20-03:48

1 stop19h 28m

San Juan Luis Munoz Marin Intl

Tue 16/12

13:41-06:55

1 stop13h 14m

£519

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 10/12

09:20-23:54

1 stop18h 34m

San Juan Luis Munoz Marin Intl

Tue 16/12

13:41-06:55

1 stop13h 14m

£519

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 26/11

12:20-03:48

1 stop19h 28m

San Juan Luis Munoz Marin Intl

Sat 6/12

15:40-09:30

1 stop13h 50m

£522

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sun 23/11

12:20-01:57

1 stop17h 37m

San Juan Luis Munoz Marin Intl

Tue 9/12

13:41-06:55

1 stop13h 14m

£530

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Thu 27/11

14:00-02:54

1 stop16h 54m

San Juan Luis Munoz Marin Intl

Fri 5/12

11:05-10:00

1 stop18h 55m

£533

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 11/11

13:00-17:54

1 stop32h 54m

San Juan Luis Munoz Marin Intl

Sat 22/11

06:00-06:00

2 stops44h 00m

£534

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 5/12

09:20-23:54

1 stop18h 34m

San Juan Luis Munoz Marin Intl

Thu 11/12

13:41-06:55

1 stop13h 14m

£538

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 60 results

...

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?

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, April is the cheapest month in which you can book a flight from London to San Juan (average of £631). Flying from London to San Juan in July is currently the most expensive (average of £1,027). 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?

It’s optimal to fly from London to San Juan in the morning. By choosing this option you can save up to 29% on the cost of your flight, compared to a flight in the afternoon.

How much does it cost for a return flight from London to San Juan?

Reviews of airlines servicing San Juan

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.

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

6.0

Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(

Finnair

7.6

Good

1,323 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

6.0

Good

Matt,May 2025

LHR - MIA

JetBlue

7.2

Good

2,912 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

6.0

Good

Matt,May 2025

LHR - MIA

Icelandair

7.0

Good

544 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

6.0

Good

Matt,May 2025

LHR - MIA

Iberia

7.0

Good

2,924 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

6.0

Good

Matt,May 2025

LHR - MIA

British Airways

6.7

Okay

7,361 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

6.0

Good

Matt,May 2025

LHR - MIA

Related info for your journey

How long is the flight from London to San Juan?
Airlines like JetBlue fly from London to San Juan in about 18h 13m. 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 £340. Other airlines that can offer you cheap pricing are JetBlue, from £439, and Icelandair, from £444. Virgin Atlantic is priced at 48% 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, April is the cheapest month in which you can book a flight from London to San Juan (average of £631). Flying from London to San Juan in July is currently the most expensive (average of £1,027). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for London to San Juan

Heathrow to Luis Munoz Marin Intl flights

Gatwick to Luis Munoz Marin Intl flights

London City to Luis Munoz Marin Intl flights

Stansted to Luis Munoz Marin Intl flights

Manchester to Luis Munoz Marin Intl flights

Edinburgh to Luis Munoz Marin Intl flights

Birmingham to Luis Munoz Marin Intl flights

Newcastle upon Tyne to Luis Munoz Marin Intl flights

Norwich to Luis Munoz Marin Intl flights

Heathrow to Aguadilla flights

Complete your trip

San Juan car hire

San Juan Luis Munoz Marin Intl Airport car hire

Ponce Mercedita Airport car hire

San Juan Isla Grande Airport car hire

Vieques Airport car hire

Condado car hire

Santurce car hire

San Juan Antiguo car hire

Hato Rey Sur car hire

Hato Rey Norte car hire

Gobernador Piñero car hire

Hato Rey Central car hire

Top 6 airlines flying from London to San Juan

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£340	Average£1,110	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
JetBlue	Cheapest£439	Average£585	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Icelandair	Cheapest£444	Average£653	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Finnair	Cheapest£446	Average£544	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Iberia	Cheapest£505	Average£804	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£532	Average£832	FlexibilityNo cancel fee	On-time70%	Search British Airways flights

Fly with Cheapflights

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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Cheap flights from London to San Juan from £277

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 7/11. Fares are subject to change and may not be available on all flights or dates of travel.

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

Cheap flight deals from London to San Juan

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from London to San Juan

Cheapest flights from London to San JuanExplore 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 16 September 2025.

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 16 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to San Juan that are best for you.

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.

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 12 September 2025.

What is the cheapest month to book a flight from London to San Juan?

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 16 September 2025.

How much does it cost for a return flight from London to San Juan?

Reviews of airlines servicing San Juan

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.

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?

What are the cheapest airlines flying from London to San Juan round-trip?

What are the most popular routes from London to San Juan?

Where are the most common stopover locations when flying from London to San Juan?

What are some popular things to do or see while on a stopover in Madrid?

Where are the least popular stopover locations for London to San Juan flights?

Can I find deals for flights from London to San Juan that include hotel bookings?

How can I find direct flights from London to San Juan?

Can I find deals for business class flights from London to San Juan?

What is the cheapest month to book a flight from London to San Juan?

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Alternative routes for London to San Juan

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Top 6 airlines flying from London to San Juan

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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 16 September 2025.