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Cheap flights from the United Kingdom to San Juan from £296

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to San Juan departing on 1/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from the United Kingdom to San Juan

Recent return flight deals from the United Kingdom to San Juan

Enter your travel dates to find the best prices.
Multiple Airlines Logo
14:00 - 01:52
LGW
-
SJU
16h 52m
1 stop
Multiple Airlines Logo
06:05 - 10:00
SJU
-
LGW
22h 55m
1 stop
£476Multiple Airlines
Mon, 21 Sep - Wed, 14 Oct
Multiple Airlines Logo
14:00 - 01:52
LGW
-
SJU
16h 52m
1 stop
Multiple Airlines Logo
21:49 - 10:00
SJU
-
LGW
31h 11m
1 stop
£491Multiple Airlines
Fri, 2 Oct - Sat, 10 Oct
JetBlue Logo
11:55 - 22:46
LHR
-
SJU
15h 51m
1 stop
JetBlue Logo
13:00 - 09:30
SJU
-
LHR
15h 30m
1 stop
£530JetBlue
Mon, 31 Aug - Mon, 14 Sep
JetBlue Logo
08:15 - 19:34
LHR
-
SJU
16h 19m
1 stop
JetBlue Logo
18:55 - 06:30
SJU
-
LHR
30h 35m
1 stop
£551JetBlue
Wed, 16 Sep - Sun, 20 Sep
Iberia Logo
09:15 - 20:00
LHR
-
SJU
14h 45m
1 stop
Iberia Logo
21:35 - 14:55
SJU
-
LHR
13h 20m
1 stop
£661Iberia
Thu, 21 Jan - Wed, 3 Feb
Icelandair Logo
12:15 - 01:52
LHR
-
SJU
17h 37m
2 stops
Icelandair Logo
06:01 - 10:50
SJU
-
LHR
24h 49m
2 stops
£757Icelandair
Wed, 9 Dec - Wed, 23 Dec
Icelandair Logo
20:35 - 01:52
LHR
-
SJU
33h 17m
2 stops
Icelandair Logo
10:43 - 10:50
SJU
-
LHR
20h 07m
2 stops
£765Icelandair
Tue, 1 Dec - Sat, 12 Dec
Aer Lingus Logo
08:45 - 15:25
NCL
-
SJU
35h 40m
2 stops
Aer Lingus Logo
17:15 - 08:15
SJU
-
NCL
34h 00m
2 stops
£769Aer Lingus
Sat, 29 Aug - Sat, 5 Sep
Aer Lingus Logo
20:30 - 15:25
LCY
-
SJU
23h 55m
2 stops
Aer Lingus Logo
17:15 - 17:30
SJU
-
LCY
19h 15m
2 stops
£771Aer Lingus
Tue, 1 Sep - Wed, 9 Sep
Iberia Logo
19:40 - 20:00
LHR
-
SJU
28h 20m
1 stop
Iberia Logo
21:35 - 17:15
SJU
-
LHR
15h 40m
1 stop
£818Iberia
Fri, 20 Nov - Sun, 29 Nov

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JetBlue flights from United Kingdom to San Juan

Our best JetBlue deals on United Kingdom to San Juan flight tickets
JetBlue
31 Aug
LHR11:55London Heathrow
15h 51m
1 stop
SJU22:46San Juan Luis Munoz Marin Intl
14 Sept
SJU13:00San Juan Luis Munoz Marin Intl
15h 30m
1 stop
LHR09:30London Heathrow
£530
JetBlue
1 Sept
LHR08:15London Heathrow
20h 58m
1 stop
SJU00:13San Juan Luis Munoz Marin Intl
9 Sept
SJU18:55San Juan Luis Munoz Marin Intl
30h 35m
1 stop
LHR06:30London Heathrow
£551
JetBlue
31 Aug
LHR11:55London Heathrow
14h 45m
1 stop
SJU21:40San Juan Luis Munoz Marin Intl
13 Sept
SJU13:00San Juan Luis Munoz Marin Intl
15h 30m
1 stop
LHR09:30London Heathrow
£552

Icelandair flights from United Kingdom to San Juan

Our best Icelandair deals on United Kingdom to San Juan flight tickets
Icelandair
11 Sept
GLA14:20Glasgow Intl
28h 19m
2 stops
SJU13:39San Juan Luis Munoz Marin Intl
15 Sept
SJU10:30San Juan Luis Munoz Marin Intl
21h 55m
2 stops
GLA13:25Glasgow Intl
£922
Icelandair
11 Sept
GLA14:20Glasgow Intl
28h 19m
2 stops
SJU13:39San Juan Luis Munoz Marin Intl
15 Sept
SJU10:30San Juan Luis Munoz Marin Intl
21h 55m
2 stops
GLA13:25Glasgow Intl
£924
Icelandair
11 Sept
GLA14:20Glasgow Intl
28h 19m
2 stops
SJU13:39San Juan Luis Munoz Marin Intl
15 Sept
SJU10:30San Juan Luis Munoz Marin Intl
21h 55m
2 stops
GLA13:25Glasgow Intl
£925

momondo 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, momondo users made 279,928 searches. Data last updated 4 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

LGW - SJU

LGWSJU

London Gatwick

Mon 21/9

14:00-01:52

1 stop16h 52m

San Juan Luis Munoz Marin Intl

Wed 14/10

06:05-10:00

1 stop22h 55m

£476

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Fri 2/10

14:00-01:52

1 stop16h 52m

San Juan Luis Munoz Marin Intl

Sat 10/10

21:49-10:00

1 stop31h 11m

£491

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 31/8

11:55-22:46

1 stop15h 51m

San Juan Luis Munoz Marin Intl

Mon 14/9

13:00-09:30

1 stop15h 30m

£530

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 16/9

08:15-19:34

1 stop16h 19m

San Juan Luis Munoz Marin Intl

Sun 20/9

18:55-06:30

1 stop30h 35m

£551
Fastest return journey

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 21/1

09:15-20:00

1 stop14h 45m

San Juan Luis Munoz Marin Intl

Wed 3/2

21:35-14:55

1 stop13h 20m

£661

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 9/12

12:15-01:52

2 stops17h 37m

San Juan Luis Munoz Marin Intl

Wed 23/12

06:01-10:50

2 stops24h 49m

£757

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 1/12

20:35-01:52

2 stops33h 17m

San Juan Luis Munoz Marin Intl

Sat 12/12

10:43-10:50

2 stops20h 07m

£765

Newcastle upon TyneSan Juan

NCL - SJU

NCLSJU

Newcastle upon Tyne

Sat 29/8

08:45-15:25

2 stops35h 40m

San Juan Luis Munoz Marin Intl

Sat 5/9

17:15-08:15

2 stops34h 00m

£769

LondonSan Juan

LCY - SJU

LCYSJU

London City

Tue 1/9

20:30-15:25

2 stops23h 55m

San Juan Luis Munoz Marin Intl

Wed 9/9

17:15-17:30

2 stops19h 15m

£771

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 20/11

19:40-20:00

1 stop28h 20m

San Juan Luis Munoz Marin Intl

Sun 29/11

21:35-17:15

1 stop15h 40m

£818

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Juan from

How to get the cheapest flight ticket from United Kingdom to San Juan

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Juan?

The cheapest month to fly to San Juan from United Kingdom is in February. Flight prices, which tend to average around £552, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to San Juan from United Kingdom during November instead. Flights to San Juan in November, while not as cheap as those in February, still average around £624.

How far in advance should I book a flight to San Juan?

You are more likely to see cheaper flights to San Juan from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan for around £704 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan from United Kingdom for as low as £556 on momondo.

Cheap United Kingdom to San Juan flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United Kingdom to San Juan

Fastest flight time

13h 35m

Direct flights

None
The fastest flight from United Kingdom to San Juan takes 13h 35m
There are no direct flights from United Kingdom to San Juan. There are no popular flight routes from United Kingdom to San Juan.
Search flight deals

Frequently asked questions about flying from the United Kingdom to San Juan

  • When did momondo last update prices for flights from United Kingdom to San Juan?

    Prices for flights from United Kingdom to San Juan are refreshed on a daily basis.

  • How many operators does momondo search for flights from United Kingdom to San Juan?

  • How old do you have to be to fly from United Kingdom to San Juan?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United Kingdom to San Juan.

  • What documentation or ID do you need to fly to San Juan?

    The necessary travel and health documents for your San Juan trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from United Kingdom to San Juan

Compare and see reviews for airlines that fly from United Kingdom to San Juan with momondo
Airline
Rating
Free Cancellation
Price
Virgin AtlanticPriceFrom £332Free CancellationRating
7.5
694 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £430Free CancellationRating
7.2
3,025 reviews
Search JetBlue flights
IcelandairPriceFrom £492Free CancellationRating
6.9
720 reviews
Search Icelandair flights
Aer LingusPriceFrom £655Free CancellationRating
7.3
1,685 reviews
Search Aer Lingus flights
IberiaPriceFrom £771Free CancellationRating
7.0
3,267 reviews
Search Iberia flights
British AirwaysPriceFrom £843Free CancellationRating
6.7
8,148 reviews
Search British Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from United Kingdom to San Juan?

Finding the right flight to San Juan from United Kingdom is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to San Juan quick and easy, saving you time and money.

Can I find flights from United Kingdom to San Juan with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to San Juan from United Kingdom with this policy.

How can momondo help me find flights from United Kingdom to San Juan?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Juan from United Kingdom.

I’m not ready to book a flight from United Kingdom to San Juan right now. Can momondo alert me if prices change?

If you are simply researching potential flights to San Juan, momondo offers a useful price alert feature which will track prices for flights to San Juan from United Kingdom and alert you when they change.

An easier way to manage your San Juan trip

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Find better results for your trip to Puerto Rico

Fly into one of these airports located in San Juan

Airports listed have a maximum distance of 7.1 mi from San Juan
San Juan Luis Munoz Marin Intl Airport