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Cheap flights from the United Kingdom to San Juan from £264

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 15/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
22 Apr — 29 Apr1
1 adult

Cheap flight deals from United Kingdom to San Juan

Keep the following information in mind while searching for United Kingdom to San Juan flight deals. Data was last updated 17 April 2025.

Round-trip from

£527

One-way from

£264

Popular in

July

Cheapest in

September

Average price

£701
6/5-12/5
  • 6/5-12/5
  • 2 total stops
  • 42h 55m total
  • United Kingdom to San Juan
15/5
  • 15/5
  • 2 total stops
  • 50h 04m total
  • United Kingdom to San Juan
Highest demand for flights based on searches. 15% potential increase in price (£92 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
Average for round-trip flights in April 2025

Find flight deals from United Kingdom to San Juan

Cheapest flights from United Kingdom to San Juan
Explore the most affordable flight options available from United Kingdom to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.

Tue 6/514:00LGW - SJU
1 stop17h 51mMultiple Airlines
Mon 12/503:56SJU - LGW
1 stop25h 04mMultiple Airlines
Deal found 16/4£527
Mon 12/508:25LHR - SJU
1 stop14h 40mIcelandair
Mon 19/518:55SJU - LHR
1 stop20h 50mIcelandair
Deal found 16/4£527
Wed 3/908:15LHR - SJU
1 stop18h 03mJetBlue
Mon 8/903:15SJU - LHR
1 stop12h 30mJetBlue
Deal found 16/4£528
Thu 11/911:30LHR - SJU
1 stop12h 00mIberia
Thu 18/913:55SJU - LHR
1 stop14h 30mIberia
Deal found 16/4£533
Sat 4/1012:10LGW - SJU
1 stop28h 54mIcelandair
Tue 21/1019:00SJU - LGW
1 stop33h 35mIcelandair
Deal found 16/4£543
Tue 27/511:30EDI - SJU
1 stop15h 00mJetBlue
Tue 3/613:58SJU - EDI
1 stop14h 17mJetBlue
Deal found 16/4£558
Sat 31/512:10LGW - SJU
1 stop16h 15mJetBlue
Sat 7/608:50SJU - LGW
1 stop19h 45mJetBlue
Deal found 15/4£593
Thu 15/520:10LHR - SJU
2 stops42h 50mMultiple Airlines
Thu 22/521:30SJU - LHR
1 stop17h 15mMultiple Airlines
Deal found 16/4£613
Tue 6/511:40STN - SJU
2 stops17h 12mMultiple Airlines
Mon 12/501:59SJU - STN
3 stops27h 41mMultiple Airlines
Deal found 16/4£618
Sat 1/1111:00LGW - SJU
2 stops29h 10mIberia
Tue 18/1118:05SJU - LGW
1 stop12h 10mIberia
Deal found 16/4£635
Fri 9/506:00EDI - SJU
2 stops23h 54mMultiple Airlines
Thu 15/501:59SJU - EDI
3 stops28h 56mMultiple Airlines
Deal found 17/4£644
Fri 12/919:15MAN - SJU
1 stop24h 55mIberia
Fri 19/913:55SJU - MAN
2 stops26h 15mIberia
Deal found 16/4£652

Cheapflights Fare Finder

Customise your flight search to find flights from United Kingdom 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 April 2025.
Use the filters below to find and compare flights from the United Kingdom to San Juan that are best for you.

Fly from

United Kingdom

Fly to

San Juan

Route

Depart

Return

Price

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 6/5

14:00-02:51

1 stop17h 51m

San Juan Luis Munoz Marin Intl

Mon 12/5

03:56-10:00

1 stop25h 04m

£527

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 12/5

08:25-18:05

1 stop14h 40m

San Juan Luis Munoz Marin Intl

Mon 19/5

18:55-20:45

1 stop20h 50m

£527

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 3/9

08:15-21:18

1 stop18h 03m

San Juan Luis Munoz Marin Intl

Mon 8/9

03:15-20:45

1 stop12h 30m

£528

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 11/9

11:30-18:30

1 stop12h 00m

San Juan Luis Munoz Marin Intl

Thu 18/9

13:55-09:25

1 stop14h 30m

£533

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Tue 27/5

11:30-21:30

1 stop15h 00m

San Juan Luis Munoz Marin Intl

Tue 3/6

13:58-09:15

1 stop14h 17m

£558

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sat 31/5

12:10-23:25

1 stop16h 15m

San Juan Luis Munoz Marin Intl

Sat 7/6

08:50-09:35

1 stop19h 45m

£593

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 15/5

20:10-10:00

2 stops42h 50m

San Juan Luis Munoz Marin Intl

Thu 22/5

21:30-19:45

1 stop17h 15m

£613

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Tue 6/5

11:40-23:52

2 stops17h 12m

San Juan Luis Munoz Marin Intl

Mon 12/5

01:59-10:40

3 stops27h 41m

£618

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Fri 9/5

06:00-00:54

2 stops23h 54m

San Juan Luis Munoz Marin Intl

Thu 15/5

01:59-11:55

3 stops28h 56m

£644

ManchesterSan Juan

MAN - SJU

MANSJU

Manchester

Fri 12/9

19:15-15:10

1 stop24h 55m

San Juan Luis Munoz Marin Intl

Fri 19/9

13:55-21:10

2 stops26h 15m

£652

Flights are sorted by cheapest return flights first.

Deals found on 16/4

Showing 1-10 of 41 results
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Best time to book a flight from United Kingdom to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from United Kingdom 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 the United Kingdom to San Juan

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

Currently, April is the cheapest month in which you can book a flight from United Kingdom to San Juan (average of £631). Flying from United Kingdom 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 GB to SJU?

Find hourly flight availability from United Kingdom 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 April 2025.

When flying from United Kingdom to San Juan, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 April 2025.
Peruse reviews from past customers who have flown with Delta, KLM and United Airlines from United Kingdom to San Juan to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
8.0
Very Good

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from United Kingdom 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 to fly from United Kingdom to San Juan one-way?

    One-way options have recently been found by users for as low as £509 on Iberia. Other airlines that offer cheap prices include Avianca from £524 and TAP AIR PORTUGAL from £626 one-way.

  • What are the most popular routes from United Kingdom to San Juan?

  • Can I find deals for flights from United Kingdom to San Juan that include hotel bookings?

    Yes. In addition to deals on United Kingdom to San Juan flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from United Kingdom to San Juan?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from United Kingdom to San Juan.

  • Can I find deals for business class flights from United Kingdom to San Juan?

    Yes. Cheapflights offers flight deals from United Kingdom 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 United Kingdom to San Juan?

    Currently, April is the cheapest month in which you can book a flight from United Kingdom to San Juan (average of £631). Flying from United Kingdom 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

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

Top 8 airlines flying from United Kingdom to San Juan

Discover the top 8 airlines that operate flights from United Kingdom 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 April 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£424Average£624FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IcelandairCheapest£430Average£735FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
JetBlueCheapest£444Average£609FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
IberiaCheapest£508Average£760FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£531Average£823FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£666Average£854FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
DeltaCheapest£851Average£1,136FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Virgin AtlanticCheapest£855Average£1,092FlexibilityNo 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 United Kingdom to San Juan?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from United Kingdom to San Juan. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from United Kingdom to San Juan?

Cheapflights helps you find that perfect flight to San Juan from United Kingdom by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from United Kingdom to San Juan with no change fees?

Yes! Cheapflights helps users easily find flights from United Kingdom to San Juan with no change fees.

Can Cheapflights notify me if prices for flights from United Kingdom to San Juan become cheaper?

Yes, Cheapflights offers price alerts on United Kingdom to San Juan flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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