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Cheap flights from the United Kingdom to San Juan from £305

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 14/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
19 May — 26 May1
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 19 April 2026.

Wed 6/511:55
LHR
-
SJU
1 stop17h 15m
JetBlue
Sun 10/517:54
SJU
-
LHR
1 stop21h 51m
JetBlue
Deal found 15/4£575
Wed 6/508:15
LHR
-
SJU
1 stop15h 21m
JetBlue
Mon 11/506:18
SJU
-
LHR
1 stop33h 27m
JetBlue
Deal found 15/4£582
Fri 6/1107:25
LHR
-
SJU
1 stop17h 20m
JetBlue
Sun 15/1107:00
SJU
-
LHR
1 stop19h 55m
JetBlue
Deal found 15/4£583
Wed 11/1112:20
LHR
-
SJU
1 stop17h 23m
JetBlue
Wed 25/1106:05
SJU
-
LHR
1 stop20h 50m
JetBlue
Deal found 16/4£583
Fri 8/512:10
EDI
-
SJU
1 stop17h 00m
JetBlue
Tue 12/514:35
SJU
-
EDI
1 stop13h 45m
JetBlue
Deal found 14/4£600
Wed 6/506:30
LHR
-
SJU
2 stops20h 59m
Multiple Airlines
Sun 10/514:48
SJU
-
LHR
1 stop15h 32m
Multiple Airlines
Deal found 15/4£614
Wed 6/508:40
LHR
-
SJU
2 stops18h 49m
Multiple Airlines
Mon 11/514:48
SJU
-
LHR
1 stop15h 32m
Multiple Airlines
Deal found 15/4£617
Fri 15/508:15
LHR
-
SJU
1 stop20h 55m
Multiple Airlines
Sat 16/518:00
SJU
-
LHR
1 stop13h 05m
Multiple Airlines
Deal found 15/4£620
Sat 2/508:15
LHR
-
SJU
1 stop15h 15m
JetBlue
Wed 6/508:00
SJU
-
LHR
1 stop17h 30m
JetBlue
Deal found 17/4£622
Mon 1/612:20
LGW
-
SJU
1 stop14h 22m
JetBlue
Mon 15/616:55
SJU
-
LGW
1 stop11h 40m
JetBlue
Deal found 14/4£626
Mon 1/612:20
LGW
-
SJU
1 stop14h 22m
JetBlue
Mon 8/605:01
SJU
-
LGW
1 stop23h 34m
JetBlue
Deal found 17/4£630
Sun 24/512:20
LGW
-
SJU
1 stop16h 59m
JetBlue
Sun 31/505:01
SJU
-
LGW
1 stop23h 34m
JetBlue
Deal found 15/4£631

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 19 April 2026.

Round-trip from

£575

One-way from

£305

Popular in

July

Cheapest in

February

Average price

£749
JetBlue
  • JetBlue
  • 6/5-10/5
  • 2 total stops
  • 39h 06m total
  • United Kingdom to San Juan
Search Deals
14/5
  • 14/5
  • 3 total stops
  • 49h 32m total
  • United Kingdom to San Juan
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£68 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 19 April 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

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Fri 8/5

12:10-00:10

1 stop17h 00m

San Juan Luis Munoz Marin Intl

Tue 12/5

14:35-09:20

1 stop13h 45m

£600
Fastest return journey

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Mon 1/6

12:20-21:42

1 stop14h 22m

San Juan Luis Munoz Marin Intl

Sun 14/6

16:57-09:35

1 stop11h 38m

£674

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 2/6

12:20-21:42

1 stop14h 22m

San Juan Luis Munoz Marin Intl

Sun 14/6

16:57-09:35

1 stop11h 38m

£674

ManchesterSan Juan

MAN - SJU

MANSJU

Manchester

Fri 15/5

20:25-22:42

2 stops31h 17m

San Juan Luis Munoz Marin Intl

Fri 22/5

20:04-11:45

3 stops34h 41m

£720

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Wed 13/5

14:00-00:19

1 stop15h 19m

San Juan Luis Munoz Marin Intl

Fri 15/5

00:59-06:20

1 stop24h 21m

£749

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Thu 15/10

10:00-18:50

1 stop13h 50m

San Juan Luis Munoz Marin Intl

Thu 29/10

18:10-23:40

2 stops25h 30m

£768

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 1/6

08:40-21:42

1 stop18h 02m

San Juan Luis Munoz Marin Intl

Sat 13/6

15:24-09:30

1 stop13h 06m

£779

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 3/6

08:15-22:53

1 stop19h 38m

San Juan Luis Munoz Marin Intl

Mon 15/6

15:24-09:30

1 stop13h 06m

£789

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 2/6

08:15-22:53

1 stop19h 38m

San Juan Luis Munoz Marin Intl

Wed 17/6

13:12-09:30

1 stop15h 18m

£789

ManchesterSan Juan

MAN - SJU

MANSJU

Manchester

Wed 10/6

06:35-22:27

2 stops20h 52m

San Juan Luis Munoz Marin Intl

Wed 17/6

17:15-13:00

1 stop14h 45m

£798

Flights are sorted by cheapest return flights first.

Deals found on 14/4

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 £140). Flying from United Kingdom to San Juan in February is currently the most expensive (average of £909). 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 19 April 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
687 reviews
Check prices

Comfort

7.3

Overall

7.5

Entertainment

7.5

Food

6.9

Boarding

7.7

Crew

8.1

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
687 reviews
Virgin Atlantic
7.5
Good
687 reviews
Check prices

Comfort

7.3

Overall

7.5

Entertainment

7.5

Food

6.9

Boarding

7.7

Crew

8.1

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
2,947 reviews
Virgin Atlantic
7.5
Good
687 reviews
Check prices

Comfort

7.3

Overall

7.5

Entertainment

7.5

Food

6.9

Boarding

7.7

Crew

8.1

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
7.0
Good
636 reviews
Virgin Atlantic
7.5
Good
687 reviews
Check prices

Comfort

7.3

Overall

7.5

Entertainment

7.5

Food

6.9

Boarding

7.7

Crew

8.1

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
3,184 reviews
Virgin Atlantic
7.5
Good
687 reviews
Check prices

Comfort

7.3

Overall

7.5

Entertainment

7.5

Food

6.9

Boarding

7.7

Crew

8.1

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
7,895 reviews
Virgin Atlantic
7.5
Good
687 reviews
Check prices

Comfort

7.3

Overall

7.5

Entertainment

7.5

Food

6.9

Boarding

7.7

Crew

8.1

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, TAP AIR PORTUGAL, and Aer Lingus fly from United Kingdom to San Juan in about 17h. The time it takes to get you to your destination can typically vary by up to 22h 20m. The distance between United Kingdom and San Juan is about 4114 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 Gatwick - San Juan Luis Munoz Marin Intl or London Stansted - 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, July is the cheapest month in which you can book a flight from United Kingdom to San Juan (average of £140). Flying from United Kingdom to San Juan in February is currently the most expensive (average of £909). 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 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 19 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£330Average£1,053FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
JetBlueCheapest£417Average£625FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
FinnairCheapest£485Average£798FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IcelandairCheapest£490Average£652FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
AviancaCheapest£533Average£590FlexibilityNo cancel feeOn-time71%
Search Avianca flights
British AirwaysCheapest£535Average£988FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IberiaCheapest£579Average£944FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Aer LingusCheapest£651Average£773FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus 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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