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Cheap flights from the United Kingdom to San Juan from £282

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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
2 Sep — 9 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to San Juan

Enter your travel dates to find the best prices.

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 3 August 2026.

Fri 2/1014:00
LGW
-
SJU
1 stop16h 52m
Multiple Airlines
Sat 10/1021:49
SJU
-
LGW
1 stop31h 11m
Multiple Airlines
Deal found 31/7£489
Wed 16/914:00
LGW
-
SJU
1 stop24h 35m
Multiple Airlines
Sat 26/921:50
SJU
-
LGW
1 stop31h 10m
Multiple Airlines
Deal found 30/7£497
Fri 6/1112:35
LGW
-
SJU
1 stop18h 15m
Multiple Airlines
Sun 15/1107:05
SJU
-
LGW
1 stop21h 10m
Multiple Airlines
Deal found 29/7£513
Mon 31/811:55
LHR
-
SJU
1 stop15h 51m
JetBlue
Mon 14/913:00
SJU
-
LHR
1 stop15h 30m
JetBlue
Deal found 31/7£529
Tue 1/908:15
LHR
-
SJU
1 stop20h 58m
JetBlue
Wed 9/918:55
SJU
-
LHR
1 stop30h 35m
JetBlue
Deal found 30/7£549
Mon 31/811:55
LHR
-
SJU
1 stop14h 45m
JetBlue
Sun 13/913:00
SJU
-
LHR
1 stop15h 30m
JetBlue
Deal found 31/7£551
Mon 7/908:40
LHR
-
SJU
1 stop34h 31m
JetBlue
Mon 21/906:00
SJU
-
LHR
1 stop22h 30m
JetBlue
Deal found 31/7£554
Mon 31/814:00
LGW
-
SJU
1 stop17h 15m
Multiple Airlines
Mon 14/910:42
SJU
-
LGW
1 stop18h 18m
Multiple Airlines
Deal found 29/7£566
Fri 30/1009:20
LHR
-
SJU
1 stop18h 05m
JetBlue
Tue 10/1107:00
SJU
-
LHR
1 stop19h 55m
JetBlue
Deal found 29/7£566
Tue 15/908:15
LHR
-
SJU
1 stop16h 19m
JetBlue
Tue 22/906:00
SJU
-
LHR
1 stop19h 30m
JetBlue
Deal found 1/8£568
Wed 18/1110:10
LGW
-
SJU
1 stop32h 06m
Multiple Airlines
Mon 23/1114:36
SJU
-
LGW
1 stop35h 24m
Multiple Airlines
Deal found 1/8£574
Sat 19/914:00
LGW
-
SJU
1 stop16h 52m
Multiple Airlines
Sat 26/921:50
SJU
-
LGW
1 stop31h 10m
Multiple Airlines
Deal found 29/7£575

Find 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 3 August 2026.

Round-trip from

£489

One-way from

£282

Popular in

December

Cheapest in

February

Average price

£738
2/10-10/10
  • 2/10-10/10
  • 2 total stops
  • 48h 03m total
  • United Kingdom to San Juan
Search Deals
16/9
  • 16/9
  • 1 total stop
  • 32h 52m total
  • United Kingdom to San Juan
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£24 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 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 3 August 2026.
Use the filters below to find and compare flights from the United Kingdom to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 11/11

07:25-20:45

1 stop17h 20m

San Juan Luis Munoz Marin Intl

Mon 23/11

02:05-21:40

1 stop15h 35m

£583

LondonSan Juan

LHR - SJU

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

£613

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Mon 17/8

12:10-21:39

1 stop14h 29m

San Juan Luis Munoz Marin Intl

Mon 31/8

13:13-09:20

1 stop15h 07m

£646
Fastest return journey

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 25/11

09:20-19:35

1 stop14h 15m

San Juan Luis Munoz Marin Intl

Fri 4/12

14:44-06:55

1 stop12h 11m

£651

BirminghamSan Juan

BHX - SJU

BHXSJU

Birmingham

Mon 14/9

17:50-02:13

2 stops37h 23m

San Juan Luis Munoz Marin Intl

Mon 28/9

20:50-00:50

1 stop23h 00m

£693

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 1/9

21:15-09:58

2 stops41h 43m

San Juan Luis Munoz Marin Intl

Wed 9/9

15:00-11:20

2 stops39h 20m

£714

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Thu 7/1

16:00-00:16

2 stops36h 16m

San Juan Luis Munoz Marin Intl

Thu 21/1

15:35-15:50

2 stops20h 15m

£719

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 7/1

06:00-00:16

2 stops22h 16m

San Juan Luis Munoz Marin Intl

Thu 21/1

15:35-17:30

2 stops21h 55m

£720

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sun 13/9

21:15-12:02

2 stops43h 47m

San Juan Luis Munoz Marin Intl

Sun 20/9

15:00-20:25

3 stops24h 25m

£729

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Thu 21/1

14:40-16:40

1 stop30h 00m

San Juan Luis Munoz Marin Intl

Fri 29/1

18:10-12:20

1 stop14h 10m

£729

Flights are sorted by cheapest return flights first.

Deals found on 29/7

Showing 1-10 of 60 resultsSorted by cheapest first
1
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6

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, February is the cheapest month in which you can book a flight from United Kingdom to San Juan (average of £550). Flying from United Kingdom to San Juan in December is currently the most expensive (average of £949). 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 far ahead should I book a flight from United Kingdom to San Juan?

Booking 42 days in advance of your planned departure date is, on average, the best time to get cheap flights from United Kingdom 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 3 August 2026.
Read through reviews of airlines operating flights from the United Kingdom to San Juan, such as Aer Lingus,JetBlue, andIcelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,685 reviews
Check prices

Boarding

7.4

Crew

8.1

Entertainment

7.0

Food

6.7

Overall

7.3

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Aer Lingus
7.3
Good
1,685 reviews
Aer Lingus
7.3
Good
1,685 reviews
Check prices

Boarding

7.4

Crew

8.1

Entertainment

7.0

Food

6.7

Overall

7.3

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
JetBlue
7.2
Good
3,027 reviews
Aer Lingus
7.3
Good
1,685 reviews
Check prices

Boarding

7.4

Crew

8.1

Entertainment

7.0

Food

6.7

Overall

7.3

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Icelandair
7.0
Good
719 reviews
Aer Lingus
7.3
Good
1,685 reviews
Check prices

Boarding

7.4

Crew

8.1

Entertainment

7.0

Food

6.7

Overall

7.3

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Iberia
7.0
Good
3,266 reviews
Aer Lingus
7.3
Good
1,685 reviews
Check prices

Boarding

7.4

Crew

8.1

Entertainment

7.0

Food

6.7

Overall

7.3

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
British Airways
6.7
Okay
8,148 reviews
Aer Lingus
7.3
Good
1,685 reviews
Check prices

Boarding

7.4

Crew

8.1

Entertainment

7.0

Food

6.7

Overall

7.3

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.

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.

  • How long is the flight from United Kingdom to San Juan?

    Airlines like JetBlue, TAP AIR PORTUGAL, and Aer Lingus fly from United Kingdom to San Juan in about 17h 20m. The time it takes to get you to your destination can typically vary by up to 24h 23m. The distance between United Kingdom and San Juan is about 4179 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    While some choose either London City - San Juan Luis Munoz Marin Intl or London Gatwick - San Juan Luis Munoz Marin Intl, London Heathrow - San Juan Luis Munoz Marin Intl is the most popular route 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, February is the cheapest month in which you can book a flight from United Kingdom to San Juan (average of £550). Flying from United Kingdom to San Juan in December is currently the most expensive (average of £949). 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 6 airlines flying from United Kingdom to San Juan

Discover the top 6 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 3 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£331Average£1,129FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
JetBlueCheapest£429Average£706FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
IcelandairCheapest£491Average£779FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£653Average£768FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IberiaCheapest£769Average£1,118FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£840Average£1,018FlexibilityNo 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 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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