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Cheap flights from the United Kingdom to San Juan from £251

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 17/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
31 Mar — 7 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 1 March 2026.

Wed 11/307:25
LHR
-
SJU
1 stop23h 29m
JetBlue
Wed 25/305:10
SJU
-
LHR
1 stop21h 45m
JetBlue
Deal found 25/2£399
Tue 17/307:25
LHR
-
SJU
1 stop17h 01m
JetBlue
Mon 23/301:30
SJU
-
LHR
1 stop25h 25m
JetBlue
Deal found 26/2£400
Sun 15/307:45
LHR
-
SJU
1 stop22h 42m
JetBlue
Tue 31/305:01
SJU
-
LHR
1 stop20h 29m
JetBlue
Deal found 28/2£462
Wed 4/307:25
LHR
-
SJU
1 stop24h 26m
JetBlue
Wed 11/304:15
SJU
-
LHR
1 stop13h 25m
JetBlue
Deal found 25/2£491
Mon 4/508:40
LHR
-
SJU
1 stop32h 20m
JetBlue
Sun 10/521:59
SJU
-
LHR
1 stop17h 46m
JetBlue
Deal found 27/2£528
Tue 12/508:15
LHR
-
SJU
1 stop20h 52m
JetBlue
Tue 19/521:59
SJU
-
LHR
1 stop17h 46m
JetBlue
Deal found 28/2£534
Mon 13/408:15
LHR
-
SJU
1 stop13h 40m
JetBlue
Mon 20/423:25
SJU
-
LHR
1 stop26h 05m
JetBlue
Deal found 27/2£534
Thu 23/408:15
LHR
-
SJU
1 stop15h 16m
JetBlue
Sun 3/523:25
SJU
-
LHR
1 stop26h 05m
JetBlue
Deal found 26/2£535
Sat 2/512:10
EDI
-
SJU
1 stop16h 57m
JetBlue
Sat 9/512:50
SJU
-
EDI
1 stop16h 10m
JetBlue
Deal found 25/2£536
Wed 7/1011:55
LHR
-
SJU
1 stop14h 29m
JetBlue
Tue 20/1014:25
SJU
-
LHR
1 stop14h 05m
JetBlue
Deal found 26/2£547
Fri 27/214:00
LGW
-
SJU
1 stop37h 09m
Multiple Airlines
Wed 4/308:50
SJU
-
LGW
1 stop17h 10m
Multiple Airlines
Deal found 25/2£553
Mon 16/319:25
LGW
-
SJU
2 stops32h 33m
Multiple Airlines
Tue 31/306:10
SJU
-
LGW
1 stop19h 10m
Multiple Airlines
Deal found 28/2£554

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 1 March 2026.

Round-trip from

£400

One-way from

£251

Popular in

July

Cheapest in

September

Average price

£642
JetBlue
  • JetBlue
  • 17/3-23/3
  • 2 total stops
  • 42h 26m total
  • United Kingdom to San Juan
Search Deals
17/4
  • 17/4
  • 3 total stops
  • 50h 22m total
  • United Kingdom to San Juan
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£70 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 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 1 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

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 23/4

11:55-21:00

1 stop14h 05m

San Juan Luis Munoz Marin Intl

Wed 29/4

10:00-09:30

1 stop18h 30m

£600

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 8/4

08:40-22:08

1 stop18h 28m

San Juan Luis Munoz Marin Intl

Thu 16/4

19:58-20:45

1 stop19h 47m

£680

LondonSan Juan

LCY - SJU

LCYSJU

London City

Tue 17/3

09:15-23:58

2 stops18h 43m

San Juan Luis Munoz Marin Intl

Tue 24/3

11:03-12:55

2 stops21h 52m

£695

BirminghamSan Juan

BHX - SJU

BHXSJU

Birmingham

Wed 15/4

07:20-00:58

3 stops22h 38m

San Juan Luis Munoz Marin Intl

Wed 22/4

10:25-20:05

3 stops28h 40m

£732

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Thu 2/4

13:35-23:58

3 stops39h 23m

San Juan Luis Munoz Marin Intl

Mon 6/4

10:00-22:50

3 stops31h 50m

£738

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Thu 2/4

14:00-08:53

1 stop23h 53m

San Juan Luis Munoz Marin Intl

Sun 5/4

01:45-10:00

1 stop27h 15m

£746

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Wed 10/6

10:35-08:56

2 stops27h 21m

San Juan Luis Munoz Marin Intl

Tue 8/9

06:00-09:45

2 stops22h 45m

£762

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 31/3

06:00-22:08

2 stops21h 08m

San Juan Luis Munoz Marin Intl

Tue 7/4

05:01-10:20

2 stops24h 19m

£775

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 3/4

08:40-22:08

1 stop18h 28m

San Juan Luis Munoz Marin Intl

Thu 16/4

19:58-20:45

1 stop19h 47m

£787

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Mon 16/3

11:00-12:31

2 stops29h 31m

San Juan Luis Munoz Marin Intl

Tue 31/3

16:32-15:35

2 stops18h 03m

£797

Flights are sorted by cheapest return flights first.

Deals found on 28/2

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 £394). Flying from United Kingdom to San Juan in December is currently the most expensive (average of £541). 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 1 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

Comfort

7.3

Boarding

7.7

Entertainment

7.6

Food

6.9

Overall

7.5

Crew

8.2

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

Comfort

7.3

Boarding

7.7

Entertainment

7.6

Food

6.9

Overall

7.5

Crew

8.2

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
2,894 reviews
Virgin Atlantic
7.5
Good
680 reviews
Check prices

Comfort

7.3

Boarding

7.7

Entertainment

7.6

Food

6.9

Overall

7.5

Crew

8.2

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

Comfort

7.3

Boarding

7.7

Entertainment

7.6

Food

6.9

Overall

7.5

Crew

8.2

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
3,127 reviews
Virgin Atlantic
7.5
Good
680 reviews
Check prices

Comfort

7.3

Boarding

7.7

Entertainment

7.6

Food

6.9

Overall

7.5

Crew

8.2

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
7,772 reviews
Virgin Atlantic
7.5
Good
680 reviews
Check prices

Comfort

7.3

Boarding

7.7

Entertainment

7.6

Food

6.9

Overall

7.5

Crew

8.2

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 Icelandair fly from United Kingdom to San Juan in about 14h 05m. The time it takes to get you to your destination can typically vary by up to 25h 22m. 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 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 £394). Flying from United Kingdom to San Juan in December is currently the most expensive (average of £541). 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 1 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£342Average£1,099FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Aer LingusCheapest£362Average£930FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
JetBlueCheapest£407Average£605FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
FinnairCheapest£433Average£599FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IcelandairCheapest£476Average£758FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£552Average£926FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£603Average£971FlexibilityNo 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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