Find flights
When to book
Airlines
FAQs

Cheap flights from London to San Juan from £296

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SJU
5 Sep — 12 Sep1
1 adult
1 adult, Economy, 0 bags

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 6 August 2026.

Mon 21/914:00 -
1 stop16h 52m
Wed 14/1006:05 -
1 stop22h 55m
Deal found 3/8£475
Fri 6/1112:35 -
1 stop18h 15m
Thu 3/1219:43 -
1 stop32h 32m
Deal found 3/8£505
Sat 19/914:00 -
1 stop24h 35m
Sat 26/910:42 -
1 stop18h 18m
Deal found 3/8£513
Fri 6/1112:35 -
1 stop18h 15m
Wed 2/1208:00 -
1 stop18h 00m
Deal found 3/8£515
Fri 6/1112:35 -
1 stop18h 15m
Mon 30/1103:50 -
1 stop22h 10m
Deal found 3/8£532
Wed 11/1110:10 -
1 stop20h 40m
Thu 3/1219:43 -
1 stop32h 32m
Deal found 3/8£539
Sun 8/1112:35 -
1 stop18h 15m
Thu 3/1219:43 -
1 stop32h 32m
Deal found 3/8£541
Wed 11/1110:10 -
1 stop20h 40m
Tue 1/1203:15 -
2 stops22h 45m
Deal found 3/8£547
Sun 8/1112:35 -
1 stop18h 15m
Tue 1/1203:15 -
2 stops22h 45m
Deal found 3/8£548
Tue 15/908:15 -
1 stop16h 19m
Tue 22/906:00 -
1 stop19h 30m
Deal found 1/8£569
Wed 11/1107:25 -
1 stop17h 20m
Mon 23/1102:05 -
1 stop15h 35m
Deal found 3/8£588
Thu 29/1007:25 -
1 stop34h 21m
Sat 7/1120:45 -
1 stop30h 10m
Deal found 5/8£591

Find 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 6 August 2026.

Round-trip from

£475

One-way from

£296

Popular in

December

Cheapest in

February

Average price

£763
21/9-14/10
  • 21/9-14/10
  • 2 total stops
  • 39h 47m total
  • London to San Juan
Search Deals
1/9
  • 1/9
  • 1 total stop
  • 13h 30m total
  • London to San Juan
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£21 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
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 6 August 2026.
Use the filters below to find and compare flights from London to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSan Juan

LGW London Gatwick - SJU San Juan Luis Munoz Marin Intl

LGWSJU

London Gatwick

Sat 19/9

14:00-01:52

1 stop16h 52m

San Juan Luis Munoz Marin Intl

Fri 25/9

02:57-10:00

1 stop26h 03m

£556

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Thu 10/9

08:15-19:34

1 stop16h 19m

San Juan Luis Munoz Marin Intl

Mon 14/9

06:00-06:30

1 stop19h 30m

£604

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Wed 18/11

09:20-00:25

1 stop19h 05m

San Juan Luis Munoz Marin Intl

Mon 23/11

12:19-06:55

1 stop14h 36m

£610

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Thu 7/1

12:20-23:59

1 stop15h 39m

San Juan Luis Munoz Marin Intl

Thu 21/1

14:00-06:55

1 stop12h 55m

£614

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Sat 5/9

08:15-20:38

1 stop17h 23m

San Juan Luis Munoz Marin Intl

Tue 15/9

06:00-06:30

1 stop19h 30m

£627

LondonSan Juan

LGW London Gatwick - SJU San Juan Luis Munoz Marin Intl

LGWSJU

London Gatwick

Sun 1/11

09:05-00:25

2 stops43h 20m

San Juan Luis Munoz Marin Intl

Thu 19/11

16:45-20:35

2 stops23h 50m

£698

LondonSan Juan

LGW London Gatwick - SJU San Juan Luis Munoz Marin Intl

LGWSJU

London Gatwick

Sat 19/9

12:05-22:27

2 stops39h 22m

San Juan Luis Munoz Marin Intl

Sat 26/9

06:00-11:20

2 stops48h 20m

£702

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Fri 4/9

12:00-09:58

2 stops26h 58m

San Juan Luis Munoz Marin Intl

Fri 11/9

06:00-22:55

2 stops35h 55m

£711

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Fri 23/10

12:00-23:58

2 stops40h 58m

San Juan Luis Munoz Marin Intl

Sat 31/10

06:00-22:40

2 stops36h 40m

£711

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Tue 1/9

18:45-08:47

2 stops43h 02m

San Juan Luis Munoz Marin Intl

Sat 12/9

06:00-12:45

2 stops25h 45m

£723

Flights are sorted by cheapest return flights first.

Deals found on 4/8

Showing 1-10 of 60 resultsSorted by cheapest first
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

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

Currently, February is the cheapest month in which you can book a flight from London to San Juan (average of £541). Flying from London to San Juan in December is currently the most expensive (average of £945). 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?

Airfare is below average for this route at the moment.
London to San Juan flights typically cost between £709 and £884 in September.
The cheapest return price found within the last 5 days was £475 on Multiple Airlines (21 Sept–14 Oct).

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

Booking 42 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.

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 6 August 2026.
Read through reviews of airlines operating flights from London to San Juan, such as JetBlue,Icelandair, andIberia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
JetBlue
7.1
Good
3,023 reviews
Check prices

Boarding

7.3

Overall

7.1

Entertainment

7.2

Comfort

7.5

Crew

7.9

Food

6.6

Reviews

1 / 20
10.0
Excellent

Rashesh,Jul 2026

FLL - BDL

The entertainment is great. They announced that they charge for food and drinks but we're giving out for free
JetBlue
7.1
Good
3,023 reviews
JetBlue
7.1
Good
3,023 reviews
Check prices

Boarding

7.3

Overall

7.1

Entertainment

7.2

Comfort

7.5

Crew

7.9

Food

6.6

Reviews

1 / 20
10.0
Excellent

Rashesh,Jul 2026

FLL - BDL

The entertainment is great. They announced that they charge for food and drinks but we're giving out for free
Icelandair
7.0
Good
721 reviews
JetBlue
7.1
Good
3,023 reviews
Check prices

Boarding

7.3

Overall

7.1

Entertainment

7.2

Comfort

7.5

Crew

7.9

Food

6.6

Reviews

1 / 20
10.0
Excellent

Rashesh,Jul 2026

FLL - BDL

The entertainment is great. They announced that they charge for food and drinks but we're giving out for free
Iberia
7.0
Good
3,264 reviews
JetBlue
7.1
Good
3,023 reviews
Check prices

Boarding

7.3

Overall

7.1

Entertainment

7.2

Comfort

7.5

Crew

7.9

Food

6.6

Reviews

1 / 20
10.0
Excellent

Rashesh,Jul 2026

FLL - BDL

The entertainment is great. They announced that they charge for food and drinks but we're giving out for free
British Airways
6.7
Okay
8,147 reviews
JetBlue
7.1
Good
3,023 reviews
Check prices

Boarding

7.3

Overall

7.1

Entertainment

7.2

Comfort

7.5

Crew

7.9

Food

6.6

Reviews

1 / 20
10.0
Excellent

Rashesh,Jul 2026

FLL - BDL

The entertainment is great. They announced that they charge for food and drinks but we're giving out for free
Avianca
6.5
Okay
2,524 reviews
JetBlue
7.1
Good
3,023 reviews
Check prices

Boarding

7.3

Overall

7.1

Entertainment

7.2

Comfort

7.5

Crew

7.9

Food

6.6

Reviews

1 / 20
10.0
Excellent

Rashesh,Jul 2026

FLL - BDL

The entertainment is great. They announced that they charge for food and drinks but we're giving out for free

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 JetBlue, TAP AIR PORTUGAL, and Turkish Airlines fly from London to San Juan in about 16h 19m. The time it takes to get you to your destination can typically vary by up to 27h 01m. The distance between London and San Juan is about 4179 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 £331. Other airlines that can offer you cheap pricing are JetBlue, from £429, and Icelandair, from £492. Virgin Atlantic is priced at 51% 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 £25.

  • 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, February is the cheapest month in which you can book a flight from London to San Juan (average of £541). Flying from London to San Juan in December is currently the most expensive (average of £945). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 5 airlines flying from London to San Juan

Discover the top 5 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 6 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£331Average£1,139FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
JetBlueCheapest£429Average£744FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
IcelandairCheapest£492Average£780FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£770Average£1,120FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£842Average£1,020FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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.