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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 - 01:52LGW  London Gatwick-SJU San Juan Luis Munoz Marin Intl
16h 52m1 stop Orlando
Multiple Airlines Logo
06:05 - 10:00SJU  San Juan Luis Munoz Marin Intl-LGW London Gatwick
22h 55m1 stop Orlando
£475Multiple Airlines
Mon, 21 Sep - Wed, 14 Oct
Multiple Airlines Logo
14:00 - 01:52LGW  London Gatwick-SJU San Juan Luis Munoz Marin Intl
16h 52m1 stop Orlando
Multiple Airlines Logo
06:15 - 10:00SJU  San Juan Luis Munoz Marin Intl-LGW London Gatwick
22h 45m2 stops Philadelphia Orlando
£490Multiple Airlines
Mon, 21 Sep - Wed, 14 Oct
JetBlue Logo
08:15 - 19:34LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
16h 19m1 stop New York John F Kennedy Intl
JetBlue Logo
06:00 - 06:30SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
19h 30m1 stop Boston Logan Intl
£569JetBlue
Tue, 15 Sep - Tue, 22 Sep
JetBlue Logo
08:15 - 19:34LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
16h 19m1 stop New York John F Kennedy Intl
JetBlue Logo
06:00 - 06:30SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
19h 30m1 stop Boston Logan Intl
£584JetBlue
Tue, 15 Sep - Tue, 22 Sep
Aer Lingus Logo
12:20 - 16:40BHX  Birmingham-SJU San Juan Luis Munoz Marin Intl
32h 20m2 stops Dublin Madrid Barajas
Aer Lingus Logo
21:35 - 07:45SJU  San Juan Luis Munoz Marin Intl-BHX Birmingham
30h 10m2 stops Madrid Barajas Dublin
£738Aer Lingus
Thu, 29 Oct - Sat, 7 Nov
Icelandair Logo
12:15 - 01:52LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
17h 37m2 stops Reykjavik Keflavik Intl New York John F Kennedy Intl
Icelandair Logo
06:01 - 10:50SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
24h 49m2 stops Boston Logan Intl Reykjavik Keflavik Intl
£757Icelandair
Wed, 9 Dec - Wed, 23 Dec
Icelandair Logo
20:35 - 01:52LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
33h 17m2 stops Reykjavik Keflavik Intl New York John F Kennedy Intl
Icelandair Logo
10:43 - 10:50SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
20h 07m2 stops New York John F Kennedy Intl Reykjavik Keflavik Intl
£764Icelandair
Tue, 1 Dec - Sat, 12 Dec
Aer Lingus Logo
17:25 - 15:25MAN  Manchester-SJU San Juan Luis Munoz Marin Intl
27h 00m2 stops Dublin Madrid Barajas
Aer Lingus Logo
17:15 - 08:40SJU  San Juan Luis Munoz Marin Intl-MAN Manchester
34h 25m2 stops Madrid Barajas Dublin
£764Aer Lingus
Tue, 1 Sep - Tue, 15 Sep
Iberia Logo
19:40 - 20:00LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
28h 20m1 stop Madrid Barajas
Iberia Logo
21:35 - 17:15SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
15h 40m1 stop Madrid Barajas
£817Iberia
Fri, 20 Nov - Sun, 29 Nov
Iberia Logo
06:15 - 21:55LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
20h 40m2 stops Madrid Barajas Miami
Iberia Logo
20:05 - 16:20SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
15h 15m1 stop Madrid Barajas
£1,060Iberia
Sat, 5 Sep - Tue, 15 Sep

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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
15 Sept
LHR08:15London Heathrow
16h 19m
1 stop
SJU19:34San Juan Luis Munoz Marin Intl
22 Sept
SJU06:00San Juan Luis Munoz Marin Intl
19h 30m
1 stop
LHR06:30London Heathrow
£569
JetBlue
15 Sept
LHR08:15London Heathrow
16h 19m
1 stop
SJU19:34San Juan Luis Munoz Marin Intl
22 Sept
SJU06:00San Juan Luis Munoz Marin Intl
19h 30m
1 stop
LHR06:30London Heathrow
£584
JetBlue
15 Sept
LHR08:15London Heathrow
16h 19m
1 stop
SJU19:34San Juan Luis Munoz Marin Intl
22 Sept
SJU06:00San Juan Luis Munoz Marin Intl
19h 30m
1 stop
LHR06:30London Heathrow
£584

TAP AIR PORTUGAL flights from United Kingdom to San Juan

Our best TAP AIR PORTUGAL deals on United Kingdom to San Juan flight tickets
TAP AIR PORTUGAL
14 Oct
LHR08:40London Heathrow
20h 18m
1 stop
SJU23:58San Juan Luis Munoz Marin Intl
27 Oct
SJU06:00San Juan Luis Munoz Marin Intl
20h 55m
1 stop
LHR06:55London Heathrow
£659
TAP AIR PORTUGAL
7 Aug
LHR11:55London Heathrow
25h 52m
1 stop
SJU08:47San Juan Luis Munoz Marin Intl
13 Aug
SJU05:45San Juan Luis Munoz Marin Intl
19h 45m
1 stop
LHR06:30London Heathrow
£827
TAP AIR PORTUGAL
8 Nov
MAN11:25Manchester
28h 58m
2 stops
SJU12:23San Juan Luis Munoz Marin Intl
12 Nov
SJU07:00San Juan Luis Munoz Marin Intl
23h 40m
2 stops
MAN10:40Manchester
£829

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 6 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 London Gatwick - SJU San Juan Luis Munoz Marin Intl

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

£475

LondonSan Juan

LGW London Gatwick - SJU San Juan Luis Munoz Marin Intl

LGWSJU

London Gatwick

Mon 21/9

14:00-01:52

1 stop16h 52m

San Juan Luis Munoz Marin Intl

Wed 14/10

06:15-10:00

2 stops22h 45m

£490
Fastest return journey

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Tue 15/9

08:15-19:34

1 stop16h 19m

San Juan Luis Munoz Marin Intl

Tue 22/9

06:00-06:30

1 stop19h 30m

£569

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Tue 15/9

08:15-19:34

1 stop16h 19m

San Juan Luis Munoz Marin Intl

Tue 22/9

06:00-06:30

1 stop19h 30m

£584

BirminghamSan Juan

BHX Birmingham - SJU San Juan Luis Munoz Marin Intl

BHXSJU

Birmingham

Thu 29/10

12:20-16:40

2 stops32h 20m

San Juan Luis Munoz Marin Intl

Sat 7/11

21:35-07:45

2 stops30h 10m

£738

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

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 London Heathrow - SJU San Juan Luis Munoz Marin Intl

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

£764

ManchesterSan Juan

MAN Manchester - SJU San Juan Luis Munoz Marin Intl

MANSJU

Manchester

Tue 1/9

17:25-15:25

2 stops27h 00m

San Juan Luis Munoz Marin Intl

Tue 15/9

17:15-08:40

2 stops34h 25m

£764

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

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

£817

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Sat 5/9

06:15-21:55

2 stops20h 40m

San Juan Luis Munoz Marin Intl

Tue 15/9

20:05-16:20

1 stop15h 15m

£1,060

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 £549, 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 £617.

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 £715 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

12h 50m

Direct flights

None
The fastest flight from United Kingdom to San Juan takes 12h 50m
There are no direct flights from United Kingdom to San Juan. There are no popular flight routes from United Kingdom to San Juan.
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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 £331Free CancellationRating
7.5
694 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £429Free CancellationRating
7.1
3,024 reviews
Search JetBlue flights
IcelandairPriceFrom £492Free CancellationRating
7.0
721 reviews
Search Icelandair flights
Aer LingusPriceFrom £654Free CancellationRating
7.3
1,691 reviews
Search Aer Lingus flights
IberiaPriceFrom £770Free CancellationRating
7.0
3,264 reviews
Search Iberia flights
British AirwaysPriceFrom £842Free CancellationRating
6.7
8,150 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.

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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