How long is the flight from London to San Juan?

Airlines like JetBlue fly from London to San Juan in about 21h 04m. 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 £342. Other airlines that can offer you cheap pricing are Finnair, from £446, and JetBlue, from £448. Virgin Atlantic is priced at 48% lower than the current average price of a flight leaving 3 months from now.

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 JetBlue, Iberia or Icelandair 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 £23.

What is the cheapest time of day to fly from LON to SJU?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to San Juan as you normally would.

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.

£247+ Flights from London to San Juan

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

Airfare is below average for this route at the moment. London to San Juan flights typically cost between £522 and £726 in February. The cheapest return flight price found within the last 3 days was £486 on JetBlue (25 Feb-9 Mar).

Cheap 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 29 December 2025.

Tue 30/1209:20LHR - SJU

1 stop18h 36mJetBlue

Sat 10/106:05SJU - LHR

1 stop23h 25mJetBlue

Deal found 27/12£705

Tue 30/1209:20LHR - SJU

1 stop14h 05mJetBlue

Thu 8/106:15SJU - LHR

1 stop20h 40mJetBlue

Deal found 27/12£715

Mon 29/1209:20LHR - SJU

1 stop28h 40mJetBlue

Mon 5/108:10SJU - LHR

1 stop33h 30mJetBlue

Deal found 28/12£786

Tue 30/1206:00LHR - SJU

2 stops23h 05mTAP AIR PORTUGAL

Sat 10/115:56SJU - LHR

2 stops22h 59mTAP AIR PORTUGAL

Deal found 27/12£1,038

Sun 28/1209:20LHR - SJU

1 stop18h 36mJetBlue

Sun 4/120:55SJU - LHR

1 stop19h 50mJetBlue

Deal found 27/12£1,070

Mon 29/1214:00LGW - SJU

1 stop23h 23mMultiple Airlines

Mon 5/110:33SJU - LGW

1 stop19h 27mMultiple Airlines

Deal found 28/12£1,174

Tue 30/1206:30LHR - SJU

2 stops22h 06mLufthansa

Thu 8/114:15SJU - LHR

1 stop14h 10mLufthansa

Deal found 27/12£1,224

Tue 30/1206:00LHR - SJU

2 stops23h 05mTAP AIR PORTUGAL

Thu 8/116:40SJU - LHR

2 stops20h 50mTAP AIR PORTUGAL

Deal found 27/12£1,244

Tue 30/1218:00LHR - SJU

1 stop34h 36mLufthansa

Sat 10/114:15SJU - LHR

2 stops42h 45mLufthansa

Deal found 27/12£1,281

Tue 30/1219:40LGW - SJU

1 stop28h 15mIberia

Sat 10/121:25SJU - LGW

1 stop33h 25mIberia

Deal found 27/12£1,298

Sun 28/1214:10LGW - SJU

1 stop23h 13mMultiple Airlines

Sun 4/114:10SJU - LGW

2 stops26h 15mMultiple Airlines

Deal found 27/12£1,302

Tue 30/1208:55LHR - SJU

1 stop21h 32mDelta

Thu 8/107:30SJU - LHR

2 stops19h 25mDelta

Deal found 28/12£1,329

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 29 December 2025.

Tue 10/213:00LGW - SJU

2 stops39h 43mMultiple Airlines

Tue 17/208:50SJU - LGW

1 stop17h 10mMultiple Airlines

Deal found 27/12£489

Thu 26/207:25LHR - SJU

1 stop21h 04mJetBlue

Fri 6/313:44SJU - LHR

1 stop15h 46mJetBlue

Deal found 27/12£511

Thu 22/106:00LHR - SJU

2 stops21h 48mTAP AIR PORTUGAL

Thu 29/114:00SJU - LHR

2 stops23h 30mTAP AIR PORTUGAL

Deal found 27/12£688

Tue 27/109:10LCY - SJU

1 stop14h 45mIberia

Wed 4/221:25SJU - LCY

1 stop31h 25mIberia

Deal found 28/12£849

Mon 26/109:50LCY - SJU

2 stops18h 46mLufthansa

Thu 5/214:15SJU - LCY

2 stops23h 25mLufthansa

Deal found 27/12£860

Thu 5/214:35STN - SJU

2 stops30h 30mMultiple Airlines

Mon 9/210:52SJU - STN

3 stops31h 48mMultiple Airlines

Deal found 28/12£508

Tue 13/109:20LHR - SJU

1 stop17h 35mJetBlue

Sat 17/106:05SJU - LHR

1 stop34h 40mJetBlue

Deal found 28/12£546

Sun 25/113:00LGW - SJU

1 stop32h 58mMultiple Airlines

Thu 29/106:00SJU - LGW

1 stop24h 00mMultiple Airlines

Deal found 28/12£510

Wed 11/212:20LHR - SJU

1 stop18h 04mJetBlue

Wed 18/214:45SJU - LHR

1 stop12h 10mJetBlue

Deal found 28/12£546

Wed 28/113:00LGW - SJU

1 stop32h 58mMultiple Airlines

Mon 2/208:50SJU - LGW

1 stop17h 10mMultiple Airlines

Deal found 27/12£513

Thu 12/312:20LHR - SJU

1 stop18h 07mJetBlue

Sun 15/303:26SJU - LHR

1 stop13h 19mJetBlue

Deal found 28/12£549

Thu 26/214:00LGW - SJU

1 stop24h 17mMultiple Airlines

Sun 8/319:05SJU - LGW

1 stop34h 55mMultiple Airlines

Deal found 27/12£548

Mon 23/212:20LHR - SJU

1 stop18h 08mJetBlue

Fri 6/310:55SJU - LHR

1 stop18h 35mJetBlue

Deal found 27/12£551

Tue 3/208:10STN - SJU

1 stop15h 45mMultiple Airlines

Tue 10/221:25SJU - STN

1 stop18h 50mMultiple Airlines

Deal found 28/12£562

Sat 11/408:40LHR - SJU

1 stop18h 21mJetBlue

Tue 21/423:59SJU - LHR

1 stop15h 46mJetBlue

Deal found 28/12£579

Wed 28/107:50LCY - SJU

1 stop12h 45mIberia

Wed 4/221:25SJU - LCY

1 stop12h 40mIberia

Deal found 27/12£867

Wed 28/105:55STN - SJU

1 stop14h 40mMultiple Airlines

Wed 4/221:25SJU - STN

1 stop18h 15mMultiple Airlines

Deal found 27/12£569

Wed 25/205:55STN - SJU

1 stop14h 40mMultiple Airlines

Fri 6/321:25SJU - STN

1 stop12h 50mMultiple Airlines

Deal found 27/12£570

Tue 10/212:20LHR - SJU

1 stop18h 04mJetBlue

Sat 21/205:01SJU - LHR

1 stop12h 59mJetBlue

Deal found 29/12£629

Fri 20/313:00LGW - SJU

1 stop30h 22mMultiple Airlines

Sat 28/316:40SJU - LGW

1 stop32h 40mMultiple Airlines

Deal found 29/12£577

Fri 20/312:20LHR - SJU

1 stop18h 07mJetBlue

Sat 28/303:26SJU - LHR

1 stop12h 19mJetBlue

Deal found 29/12£658

Fri 20/313:00LGW - SJU

1 stop30h 22mMultiple Airlines

Sun 29/306:05SJU - LGW

1 stop19h 15mMultiple Airlines

Deal found 29/12£577

Sat 17/114:00LGW - SJU

1 stop23h 47mMultiple Airlines

Sun 25/120:05SJU - LGW

1 stop33h 55mMultiple Airlines

Deal found 28/12£580

Tue 27/114:30STN - SJU

2 stops30h 35mMultiple Airlines

Wed 4/210:52SJU - STN

3 stops30h 33mMultiple Airlines

Deal found 28/12£581

Mon 2/214:00LGW - SJU

1 stop13h 59mMultiple Airlines

Wed 18/208:50SJU - LGW

1 stop17h 10mMultiple Airlines

Deal found 28/12£587

Tue 13/111:55LGW - SJU

3 stops31h 40mMultiple Airlines

Sat 17/106:00SJU - LGW

3 stops24h 55mMultiple Airlines

Deal found 28/12£588

Sun 1/207:40STN - SJU

1 stop12h 55mMultiple Airlines

Sun 15/221:25SJU - STN

1 stop12h 35mMultiple Airlines

Deal found 29/12£598

Wed 28/118:10LCY - SJU

3 stops33h 23mMultiple Airlines

Thu 5/210:52SJU - LCY

2 stops18h 28mMultiple Airlines

Deal found 27/12£600

Mon 12/108:30LGW - SJU

2 stops22h 43mMultiple Airlines

Sun 18/121:04SJU - LGW

1 stop32h 56mMultiple Airlines

Deal found 28/12£623

Thu 5/209:40LCY - SJU

3 stops28h 07mMultiple Airlines

Mon 9/206:00SJU - LCY

3 stops23h 15mMultiple Airlines

Deal found 28/12£626

Last-minute flights from London to San Juan
Discover last-minute flight deals from London to San Juan. Data last updated 29 December 2025 and is based on user searches.

Tue 6/107:25LHR - SJU

1 stop30h 33mJetBlue

Tue 13/108:15SJU - LHR

1 stop21h 15mJetBlue

Deal found 27/12£568

Sat 17/108:30LGW - SJU

2 stops22h 55mMultiple Airlines

Sun 25/120:05SJU - LGW

1 stop33h 55mMultiple Airlines

Deal found 28/12£529

Sun 25/113:00LGW - SJU

1 stop32h 58mMultiple Airlines

Thu 29/106:00SJU - LGW

1 stop24h 00mMultiple Airlines

Deal found 28/12£510

Mon 26/111:55LGW - SJU

3 stops31h 40mMultiple Airlines

Mon 2/206:00SJU - LGW

3 stops24h 55mMultiple Airlines

Deal found 27/12£508

Mon 26/109:15LCY - SJU

3 stops34h 20mMultiple Airlines

Mon 2/210:52SJU - LCY

2 stops26h 13mMultiple Airlines

Deal found 27/12£554

Tue 27/114:30STN - SJU

2 stops30h 35mMultiple Airlines

Wed 4/210:52SJU - STN

3 stops30h 33mMultiple Airlines

Deal found 28/12£581

Wed 28/113:00LGW - SJU

1 stop32h 58mMultiple Airlines

Mon 2/208:50SJU - LGW

1 stop17h 10mMultiple Airlines

Deal found 27/12£513

Wed 28/111:55LGW - SJU

3 stops31h 40mMultiple Airlines

Thu 5/206:00SJU - LGW

3 stops24h 55mMultiple Airlines

Deal found 28/12£536

Wed 28/113:00LGW - SJU

1 stop14h 59mMultiple Airlines

Wed 4/211:06SJU - LGW

1 stop14h 54mMultiple Airlines

Deal found 29/12£567

Wed 28/105:55STN - SJU

1 stop14h 40mMultiple Airlines

Wed 4/221:25SJU - STN

1 stop18h 15mMultiple Airlines

Deal found 27/12£569

Thu 29/114:00LGW - SJU

1 stop13h 59mMultiple Airlines

Thu 19/216:25SJU - LGW

1 stop13h 35mMultiple Airlines

Deal found 28/12£504

Thu 29/114:00LGW - SJU

1 stop13h 59mMultiple Airlines

Wed 18/208:50SJU - LGW

1 stop17h 10mMultiple Airlines

Deal found 28/12£538

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 29 December 2025.

Mon 26/114:00LGW - SJU

1 stop29h 26mMultiple Airlines

Deal found 27/12£247

Mon 9/214:00LGW - SJU

1 stop26h 57mMultiple Airlines

Deal found 27/12£255

Wed 11/307:40STN - SJU

2 stops21h 39mMultiple Airlines

Deal found 28/12£275

Wed 11/208:35LGW - SJU

2 stops31h 00mMultiple Airlines

Deal found 28/12£281

Wed 11/205:55STN - SJU

2 stops33h 40mMultiple Airlines

Deal found 28/12£282

Mon 26/114:25STN - SJU

2 stops54h 40mMultiple Airlines

Deal found 27/12£290

Wed 11/309:55LHR - SJU

2 stops19h 24mMultiple Airlines

Deal found 28/12£292

Mon 9/209:35STN - SJU

2 stops35h 30mMultiple Airlines

Deal found 27/12£297

Wed 11/317:20SEN - SJU

3 stops22h 15mMultiple Airlines

Deal found 28/12£302

Thu 12/320:30STN - SJU

3 stops48h 35mMultiple Airlines

Deal found 28/12£304

Wed 11/218:45LHR - SJU

2 stops20h 50mMultiple Airlines

Deal found 28/12£307

Mon 9/217:25LHR - SJU

2 stops27h 40mMultiple Airlines

Deal found 27/12£309

Find flight deals from London to San Juan

Round-trip from	£486
One-way from	£247
Popular in	December
Cheapest in	September
Average price	£948

JetBlue
25/2-9/3
2 total stops
35h 24m total
London to San Juan

Search Deals

26/1
1 total stop
29h 26m total
London to San Juan

Search Deals

Highest demand for flights based on searches. 5% potential increase in price (£28 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 10/2

13:00-00:43

2 stops39h 43m

San Juan Luis Munoz Marin Intl

Tue 17/2

08:50-06:00

1 stop17h 10m

£489

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Thu 5/2

14:35-17:05

2 stops30h 30m

San Juan Luis Munoz Marin Intl

Mon 9/2

10:52-22:40

3 stops31h 48m

£508

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sun 25/1

13:00-17:58

1 stop32h 58m

San Juan Luis Munoz Marin Intl

Thu 29/1

06:00-10:00

1 stop24h 00m

£510

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 26/2

07:25-00:29

1 stop21h 04m

San Juan Luis Munoz Marin Intl

Fri 6/3

13:44-09:30

1 stop15h 46m

£511

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Wed 28/1

13:00-17:58

1 stop32h 58m

San Juan Luis Munoz Marin Intl

Mon 2/2

08:50-06:00

1 stop17h 10m

£513

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 13/1

09:20-22:55

1 stop17h 35m

San Juan Luis Munoz Marin Intl

Sat 17/1

06:05-20:45

1 stop34h 40m

£546

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 11/2

12:20-02:24

1 stop18h 04m

San Juan Luis Munoz Marin Intl

Wed 18/2

14:45-06:55

1 stop12h 10m

£546

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Thu 26/2

14:00-10:17

1 stop24h 17m

San Juan Luis Munoz Marin Intl

Sun 8/3

19:05-10:00

1 stop34h 55m

£548

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 12/3

12:20-02:27

1 stop18h 07m

San Juan Luis Munoz Marin Intl

Sun 15/3

03:26-20:45

1 stop13h 19m

£549

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 23/2

12:20-02:28

1 stop18h 08m

San Juan Luis Munoz Marin Intl

Fri 6/3

10:55-09:30

1 stop18h 35m

£551

Flights are sorted by cheapest return flights first.

Deals found on 27/12

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 75 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, June is the cheapest month in which you can book a flight from London to San Juan (average of £435). Flying from London to San Juan in December is currently the most expensive (average of £542). 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.

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

1,340 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Sept 2025

WAW - HEL

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.

Finnair

7.6

Good

1,340 reviews

Finnair

7.6

Good

1,340 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Sept 2025

WAW - HEL

JetBlue

7.2

Good

2,903 reviews

Finnair

7.6

Good

1,340 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Sept 2025

WAW - HEL

Icelandair

7.0

Good

592 reviews

Finnair

7.6

Good

1,340 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Sept 2025

WAW - HEL

Iberia

7.0

Good

3,059 reviews

Finnair

7.6

Good

1,340 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Sept 2025

WAW - HEL

British Airways

6.7

Okay

7,620 reviews

Finnair

7.6

Good

1,340 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Sept 2025

WAW - HEL

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 21h 04m. 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 £342. Other airlines that can offer you cheap pricing are Finnair, from £446, and JetBlue, from £448. 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 £23.
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, June is the cheapest month in which you can book a flight from London to San Juan (average of £435). Flying from London to San Juan in December is currently the most expensive (average of £542). 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

Hato Rey Central car hire

Gobernador Piñero car hire

Top 6 airlines flying from London to San Juan

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£342	Average£984	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Finnair	Cheapest£446	Average£537	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
JetBlue	Cheapest£447	Average£605	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Icelandair	Cheapest£482	Average£646	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Iberia	Cheapest£498	Average£874	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£535	Average£947	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.

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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 £247

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 26/1. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap 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 29 December 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 29 December 2025.

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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.

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 26 December 2025.

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

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?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for London to San Juan

See prices for flight routes from nearby airports that may be better suited for you.

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 29 December 2025.