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Cheap flights from the United Kingdom to San Juan from £234

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 13/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
5 Apr — 12 Apr1
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 6 March 2026.

Mon 9/308:05
LHR
-
SJU
1 stop19h 24m
JetBlue
Mon 16/303:26
SJU
-
LHR
1 stop14h 14m
JetBlue
Deal found 2/3£415
Tue 28/408:15
LHR
-
SJU
1 stop15h 15m
JetBlue
Sun 10/512:00
SJU
-
LHR
1 stop16h 30m
JetBlue
Deal found 4/3£432
Fri 13/308:05
LHR
-
SJU
1 stop30h 50m
JetBlue
Tue 17/305:10
SJU
-
LHR
1 stop21h 45m
JetBlue
Deal found 2/3£462
Tue 17/307:25
LHR
-
SJU
1 stop17h 01m
JetBlue
Tue 24/305:10
SJU
-
LHR
1 stop21h 45m
JetBlue
Deal found 2/3£464
Sun 15/307:45
LHR
-
SJU
1 stop21h 40m
JetBlue
Tue 31/305:01
SJU
-
LHR
1 stop20h 29m
JetBlue
Deal found 3/3£465
Wed 18/312:20
LHR
-
SJU
1 stop17h 05m
JetBlue
Wed 3/620:06
SJU
-
LHR
1 stop19h 39m
JetBlue
Deal found 4/3£474
Mon 13/408:15
LHR
-
SJU
1 stop13h 40m
JetBlue
Wed 29/414:35
SJU
-
LHR
1 stop13h 55m
JetBlue
Deal found 3/3£513
Tue 14/411:55
LHR
-
SJU
1 stop17h 12m
JetBlue
Mon 27/423:25
SJU
-
LHR
1 stop26h 05m
JetBlue
Deal found 5/3£534
Wed 18/307:25
LHR
-
SJU
1 stop23h 02m
JetBlue
Tue 24/303:26
SJU
-
LHR
1 stop14h 14m
JetBlue
Deal found 2/3£534
Mon 20/411:55
LHR
-
SJU
1 stop19h 12m
JetBlue
Tue 12/506:25
SJU
-
LHR
1 stop22h 05m
JetBlue
Deal found 4/3£539
Mon 13/406:40
STN
-
SJU
2 stops41h 39m
Multiple Airlines
Tue 28/420:40
SJU
-
STN
1 stop14h 20m
Multiple Airlines
Deal found 5/3£563
Tue 17/308:30
LGW
-
SJU
2 stops19h 28m
Multiple Airlines
Mon 23/303:08
SJU
-
LGW
1 stop26h 52m
Multiple Airlines
Deal found 2/3£584

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 6 March 2026.

Round-trip from

£432

One-way from

£234

Popular in

July

Cheapest in

September

Average price

£649
JetBlue
  • JetBlue
  • 28/4-10/5
  • 2 total stops
  • 31h 45m total
  • United Kingdom to San Juan
Search Deals
13/4
  • 13/4
  • 2 total stops
  • 41h 39m total
  • United Kingdom to San Juan
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£71 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 6 March 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

LGW - SJU

LGWSJU

London Gatwick

Sat 18/4

14:00-11:52

1 stop26h 52m

San Juan Luis Munoz Marin Intl

Sat 25/4

20:27-10:00

1 stop32h 33m

£584

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Fri 17/4

14:00-09:19

1 stop24h 19m

San Juan Luis Munoz Marin Intl

Thu 23/4

02:59-10:00

1 stop26h 01m

£638

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Sat 18/4

16:00-00:58

2 stops37h 58m

San Juan Luis Munoz Marin Intl

Sat 25/4

17:25-19:45

1 stop21h 20m

£650
Fastest return journey

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 16/3

12:20-22:51

1 stop14h 31m

San Juan Luis Munoz Marin Intl

Thu 19/3

05:01-21:40

1 stop12h 39m

£680

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sun 12/4

14:00-08:53

1 stop23h 53m

San Juan Luis Munoz Marin Intl

Fri 24/4

19:01-10:00

1 stop33h 59m

£709

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 14/4

15:40-02:07

2 stops39h 27m

San Juan Luis Munoz Marin Intl

Thu 23/4

06:25-14:40

2 stops27h 15m

£712

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Wed 8/4

14:00-08:53

1 stop23h 53m

San Juan Luis Munoz Marin Intl

Tue 14/4

02:59-10:00

1 stop26h 01m

£727

ManchesterSan Juan

MAN - SJU

MANSJU

Manchester

Mon 13/4

06:00-08:05

2 stops31h 05m

San Juan Luis Munoz Marin Intl

Sun 19/4

14:45-10:25

2 stops38h 40m

£743

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Thu 23/4

15:40-02:07

2 stops39h 27m

San Juan Luis Munoz Marin Intl

Wed 29/4

10:00-14:40

2 stops23h 40m

£761

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Mon 4/5

12:05-02:39

2 stops19h 34m

San Juan Luis Munoz Marin Intl

Sun 17/5

23:25-09:45

2 stops29h 20m

£762

Flights are sorted by cheapest return flights first.

Deals found on 4/3

Showing 1-10 of 60 resultsSorted by cheapest first
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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, July is the cheapest month in which you can book a flight from United Kingdom to San Juan (average of £398). Flying from United Kingdom to San Juan in December is currently the most expensive (average of £547). 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.

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 March 2026.
Read through reviews of airlines operating flights from the United Kingdom to San Juan, such as Virgin Atlantic, JetBlue, andIcelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
680 reviews
Check prices

Boarding

7.7

Overall

7.5

Comfort

7.3

Entertainment

7.6

Crew

8.2

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.5
Good
680 reviews
Virgin Atlantic
7.5
Good
680 reviews
Check prices

Boarding

7.7

Overall

7.5

Comfort

7.3

Entertainment

7.6

Crew

8.2

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
JetBlue
7.2
Good
2,895 reviews
Virgin Atlantic
7.5
Good
680 reviews
Check prices

Boarding

7.7

Overall

7.5

Comfort

7.3

Entertainment

7.6

Crew

8.2

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Icelandair
7.1
Good
617 reviews
Virgin Atlantic
7.5
Good
680 reviews
Check prices

Boarding

7.7

Overall

7.5

Comfort

7.3

Entertainment

7.6

Crew

8.2

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Iberia
7.0
Good
3,134 reviews
Virgin Atlantic
7.5
Good
680 reviews
Check prices

Boarding

7.7

Overall

7.5

Comfort

7.3

Entertainment

7.6

Crew

8.2

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
British Airways
6.7
Okay
7,778 reviews
Virgin Atlantic
7.5
Good
680 reviews
Check prices

Boarding

7.7

Overall

7.5

Comfort

7.3

Entertainment

7.6

Crew

8.2

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

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, Icelandair, and TAP AIR PORTUGAL fly from United Kingdom to San Juan in about 14h 31m. The time it takes to get you to your destination can typically vary by up to 24h 56m. 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 Heathrow - San Juan Luis Munoz Marin Intl or London Stansted - San Juan Luis Munoz Marin Intl, London Gatwick - 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, July is the cheapest month in which you can book a flight from United Kingdom to San Juan (average of £398). Flying from United Kingdom to San Juan in December is currently the most expensive (average of £547). 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 7 airlines flying from United Kingdom to San Juan

Discover the top 7 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 6 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£346Average£1,111FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Aer LingusCheapest£366Average£941FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
JetBlueCheapest£411Average£611FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
FinnairCheapest£438Average£605FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IcelandairCheapest£481Average£767FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£558Average£936FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£610Average£981FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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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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