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Cheap flights from London to San Juan from £226

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 24/2. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SJU
22 Jan — 29 Jan1
1 adult

The best prices from London to San Juan are usually found in September or February, booked 56 days in advance, depart on a Monday or Tuesday and return on a Wednesday

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 17 January 2025.

Round-trip from

£525

One-way from

£226

Popular in

August

Cheapest in

September

Average price

£601
21/2-26/2
  • 21/2-26/2
  • 6 total stops
  • 46h 05m total
  • London to San Juan
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24/2
  • 24/2
  • 1 total stop
  • 26h 44m total
  • London to San Juan
Search Deals
High demand for flights, 8% potential price rise
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Best time to find cheap flights, 2% potential price drop
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Average for round-trip flights in January 2025
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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 17 January 2025.

Fri 24/112:20LHR - SJU
1 stop17h 22mJetBlue
Fri 7/208:00SJU - LHR
1 stop17h 55mJetBlue
Deal found 15/1£523
Sat 18/114:00LGW - SJU
1 stop25h 18mMultiple Airlines
Mon 27/119:12SJU - LGW
2 stops38h 38mMultiple Airlines
Deal found 16/1£524
Fri 21/211:00STN - SJU
3 stops26h 43mMultiple Airlines
Wed 26/210:38SJU - STN
3 stops19h 22mMultiple Airlines
Deal found 16/1£525
Mon 10/220:05LHR - SJU
2 stops41h 44mMultiple Airlines
Sun 16/210:44SJU - LHR
1 stop16h 31mMultiple Airlines
Deal found 16/1£539
Tue 18/211:25LHR - SJU
1 stop12h 20mIberia
Mon 24/218:29SJU - LHR
1 stop13h 51mIberia
Deal found 16/1£552
Mon 8/912:10LGW - SJU
1 stop18h 05mIcelandair
Mon 15/906:25SJU - LGW
1 stop22h 10mIcelandair
Deal found 17/1£555
Thu 13/211:00LGW - SJU
1 stop12h 45mIberia
Thu 20/213:05SJU - LGW
2 stops17h 10mIberia
Deal found 16/1£563
Thu 1/508:25LHR - SJU
1 stop14h 32mIcelandair
Sun 11/507:50SJU - LHR
1 stop31h 55mIcelandair
Deal found 17/1£592
Tue 9/909:30LHR - SJU
2 stops34h 14mUnited Airlines
Tue 16/907:00SJU - LHR
2 stops22h 40mUnited Airlines
Deal found 16/1£600
Mon 17/310:15LHR - SJU
2 stops17h 25mFinnair
Sun 23/315:24SJU - LHR
1 stop16h 36mFinnair
Deal found 16/1£601
Fri 21/209:25LCY - SJU
3 stops35h 36mMultiple Airlines
Wed 26/210:38SJU - LCY
3 stops26h 27mMultiple Airlines
Deal found 16/1£624
Fri 24/111:10LHR - SJU
1 stop31h 30mAir Canada
Thu 6/219:35SJU - LHR
2 stops30h 55mAir Canada
Deal found 17/1£628

Find flights from London to San Juan within your budget

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 17 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Fri 21/2

11:00-09:43

3 stops26h 43m

San Juan Luis Munoz Marin Intl

Wed 26/2

10:38-10:00

3 stops19h 22m

£525

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sun 23/2

07:25-23:36

1 stop20h 11m

San Juan Luis Munoz Marin Intl

Mon 3/3

22:45-20:45

1 stop18h 00m

£529

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Fri 25/4

10:00-14:45

1 stop33h 45m

San Juan Luis Munoz Marin Intl

Fri 9/5

20:30-10:00

1 stop32h 30m

£533

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 10/2

20:05-09:49

2 stops41h 44m

San Juan Luis Munoz Marin Intl

Sun 16/2

10:44-07:15

1 stop16h 31m

£539

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 13/2

11:25-19:45

1 stop12h 20m

San Juan Luis Munoz Marin Intl

Thu 20/2

14:40-09:40

1 stop15h 00m

£551

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Thu 13/2

11:00-19:45

1 stop12h 45m

San Juan Luis Munoz Marin Intl

Thu 20/2

13:05-10:15

2 stops17h 10m

£563

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 1/5

08:25-17:57

1 stop14h 32m

San Juan Luis Munoz Marin Intl

Sun 11/5

07:50-20:45

1 stop31h 55m

£592

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 17/3

10:15-23:40

2 stops17h 25m

San Juan Luis Munoz Marin Intl

Sun 23/3

15:24-12:00

1 stop16h 36m

£601

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 21/2

11:10-21:46

2 stops38h 36m

San Juan Luis Munoz Marin Intl

Mon 10/3

06:45-11:05

1 stop24h 20m

£603

LondonSan Juan

LCY - SJU

LCYSJU

London City

Fri 21/2

09:25-17:01

3 stops35h 36m

San Juan Luis Munoz Marin Intl

Wed 26/2

10:38-17:05

3 stops26h 27m

£624

Flights are sorted by cheapest return flights first.

Deals found on 16/1

Showing 1-10 of 45 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.

Travel insights for flights from London to San Juan

Get recent, data-driven insights about flights from London to San Juan including ideal travel times, pricing trends, and more.

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 10 January 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, 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?

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 17 January 2025.

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.

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

Use this chart to determine the cheapest time to fly return from London to San Juan. Price data was last updated on 16 December 2024.

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.

Rainfall in San Juan by month

Plan your trip to San Juan by taking into account the average rainfall totals by month.

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.

Temperature in San Juan by month

Plan your trip to San Juan by taking into account the average temperature totals by month.

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).

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 17 January 2025.
To help decide which airline to fly from London to San Juan, see what other customers have to say about JetBlue, Icelandair and British Airways. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
8,513 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Reviews

1 / 10

Overall it was good on the flight. Before the flight with checking the bag at JFK was a nightmare. It took way too long and the Delta concierge was very rude to everyone. But other than that it was fine.

Delta
8.0
Very Good
8,513 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Reviews

1 / 10

Overall it was good on the flight. Before the flight with checking the bag at JFK was a nightmare. It took way too long and the Delta concierge was very rude to everyone. But other than that it was fine.

Finnair
7.6
Good
1,285 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Reviews

1 / 10

Overall it was good on the flight. Before the flight with checking the bag at JFK was a nightmare. It took way too long and the Delta concierge was very rude to everyone. But other than that it was fine.

Virgin Atlantic
7.5
Good
664 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Reviews

1 / 10

Overall it was good on the flight. Before the flight with checking the bag at JFK was a nightmare. It took way too long and the Delta concierge was very rude to everyone. But other than that it was fine.

Air France
7.4
Good
1,487 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Reviews

1 / 10

Overall it was good on the flight. Before the flight with checking the bag at JFK was a nightmare. It took way too long and the Delta concierge was very rude to everyone. But other than that it was fine.

United Airlines
7.4
Good
8,969 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Reviews

1 / 10

Overall it was good on the flight. Before the flight with checking the bag at JFK was a nightmare. It took way too long and the Delta concierge was very rude to everyone. But other than that it was fine.

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.

  • 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 £529. Other airlines that can offer you cheap pricing are Iberia, from £551, and Icelandair, from £592. JetBlue is priced at 25% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from London to San Juan one-way?

    The cheapet airlines for a one-way flight from London to San Juan are Iberia (£502), United Airlines (£560), and Avianca (£566).

  • 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. New York sees the second most layovers for non-direct flights flying from London to San Juan.

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

    Spain Building, Plaza Mayor, and Puerta del Sol are the most popular attractions in Madrid if you're in need of something to do during your stopover. Spain Building, Plaza Mayor and Puerta del Sol are located about 8.5 mi, 8.6 mi, and 8.4 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.

  • What are some popular points of interest to see during a stopover in New York?

    Times Square, New York City Center, and August Wilson Theater are the most popular attractions in New York if you're in need of something to do during your stopover. Times Square, New York City Center, and August Wilson Theater can be accessed by travelling approximately 13.6 mi, 13.6 mi, and 13.7 mi, respectively from New York John F Kennedy Intl. Travellers in need of a car in New York can hire one for about £42 per day.

  • 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 Miami.

  • 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

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Top 6 airlines flying from London to San Juan

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 17 January 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£435Average£624FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
IcelandairCheapest£466Average£667FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
FinnairCheapest£468Average£609FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest£580Average£802FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£616Average£825FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£923Average£1,117FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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.

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