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Cheap flights from the United Kingdom to San Juan from £306

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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
17 Aug — 24 Aug1
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 18 July 2026.

Fri 18/914:00
LGW
-
SJU
1 stop16h 50m
Multiple Airlines
Sun 4/1009:03
SJU
-
LGW
1 stop19h 57m
Multiple Airlines
Deal found 14/7£497
Fri 11/914:00
LGW
-
SJU
1 stop28h 16m
Multiple Airlines
Mon 28/909:03
SJU
-
LGW
1 stop19h 57m
Multiple Airlines
Deal found 12/7£499
Mon 21/914:00
LGW
-
SJU
1 stop28h 16m
Multiple Airlines
Sun 4/1006:05
SJU
-
LGW
1 stop22h 55m
Multiple Airlines
Deal found 14/7£509
Sat 19/914:00
LGW
-
SJU
1 stop16h 50m
Multiple Airlines
Wed 30/906:05
SJU
-
LGW
1 stop22h 55m
Multiple Airlines
Deal found 17/7£521
Sun 20/914:00
LGW
-
SJU
1 stop16h 50m
Multiple Airlines
Sun 4/1006:05
SJU
-
LGW
1 stop22h 55m
Multiple Airlines
Deal found 14/7£530
Mon 21/914:00
LGW
-
SJU
1 stop28h 16m
Multiple Airlines
Fri 2/1009:03
SJU
-
LGW
1 stop19h 57m
Multiple Airlines
Deal found 14/7£531
Sun 13/914:00
LGW
-
SJU
1 stop22h 58m
Multiple Airlines
Sun 27/918:42
SJU
-
LGW
1 stop34h 18m
Multiple Airlines
Deal found 14/7£533
Sat 19/914:00
LGW
-
SJU
1 stop16h 50m
Multiple Airlines
Sun 4/1006:05
SJU
-
LGW
1 stop22h 55m
Multiple Airlines
Deal found 14/7£555
Mon 7/908:15
LHR
-
SJU
1 stop20h 55m
JetBlue
Mon 14/906:00
SJU
-
LHR
1 stop22h 30m
JetBlue
Deal found 17/7£559
Sun 6/914:00
LGW
-
SJU
1 stop17h 15m
Multiple Airlines
Mon 14/909:03
SJU
-
LGW
1 stop19h 57m
Multiple Airlines
Deal found 17/7£569
Sun 13/908:40
LHR
-
SJU
1 stop34h 43m
JetBlue
Sun 27/906:00
SJU
-
LHR
1 stop33h 45m
JetBlue
Deal found 14/7£576
Wed 30/908:15
LHR
-
SJU
1 stop16h 17m
JetBlue
Mon 12/1006:12
SJU
-
LHR
1 stop19h 18m
JetBlue
Deal found 14/7£581

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 18 July 2026.

Round-trip from

£497

One-way from

£306

Popular in

December

Cheapest in

February

Average price

£896
18/9-4/10
  • 18/9-4/10
  • 2 total stops
  • 36h 47m total
  • United Kingdom to San Juan
Search Deals
11/11
  • 11/11
  • 3 total stops
  • 40h 39m total
  • United Kingdom to San Juan
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£25 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 July 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 18 July 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

Sat 5/9

08:15-23:32

1 stop20h 17m

San Juan Luis Munoz Marin Intl

Tue 15/9

13:00-09:30

1 stop15h 30m

£608

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sat 29/8

12:20-23:54

1 stop16h 34m

San Juan Luis Munoz Marin Intl

Sat 5/9

16:15-09:35

1 stop12h 20m

£641

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Thu 3/9

12:10-21:39

1 stop14h 29m

San Juan Luis Munoz Marin Intl

Mon 7/9

15:10-09:20

1 stop13h 10m

£661

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 25/11

09:20-19:29

1 stop14h 09m

San Juan Luis Munoz Marin Intl

Fri 4/12

14:41-06:55

1 stop12h 14m

£677

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Sat 19/9

08:45-18:45

1 stop15h 00m

San Juan Luis Munoz Marin Intl

Sat 26/9

20:30-15:15

1 stop13h 45m

£680

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Wed 12/8

14:00-19:32

1 stop34h 32m

San Juan Luis Munoz Marin Intl

Wed 19/8

20:57-10:00

1 stop32h 03m

£690

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Mon 17/8

11:30-23:54

1 stop17h 24m

San Juan Luis Munoz Marin Intl

Mon 31/8

14:30-10:00

1 stop14h 30m

£690

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Wed 26/8

12:20-23:54

1 stop16h 34m

San Juan Luis Munoz Marin Intl

Wed 2/9

13:50-09:35

1 stop14h 45m

£693

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sat 19/9

12:05-23:58

2 stops40h 53m

San Juan Luis Munoz Marin Intl

Sat 26/9

06:00-11:20

2 stops48h 20m

£698

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Wed 28/10

09:35-13:03

2 stops31h 28m

San Juan Luis Munoz Marin Intl

Sat 7/11

07:00-09:50

2 stops22h 50m

£700

Flights are sorted by cheapest return flights first.

Deals found on 12/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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 £552). Flying from United Kingdom to San Juan in December is currently the most expensive (average of £950). 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 18 July 2026.
Read through reviews of airlines operating flights from the United Kingdom to San Juan, such as Virgin Atlantic,Aer Lingus, andJetBlue. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.1

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
693 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.1

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Aer Lingus
7.3
Good
1,671 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.1

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
JetBlue
7.1
Good
3,012 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.1

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Icelandair
7.0
Good
710 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.1

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Iberia
7.0
Good
3,258 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.1

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

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 20h 17m. The time it takes to get you to your destination can typically vary by up to 20h 36m. 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 City - 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 £552). Flying from United Kingdom to San Juan in December is currently the most expensive (average of £950). 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 18 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£332Average£1,128FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
JetBlueCheapest£432Average£661FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
IcelandairCheapest£492Average£678FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£655Average£770FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IberiaCheapest£771Average£1,121FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£842Average£1,008FlexibilityNo 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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