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Cheap flights from the United Kingdom to San Juan from £283

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 1/3. 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
0 bags

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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 - 10:24
LGW
-
SJU
24h 24m1 stop
Multiple Airlines Logo
17:50 - 15:50
SJU
-
LGW
18h 00m2 stops
£526Multiple Airlines
Thu, 22 Jan - Thu, 29 Jan
Multiple Airlines Logo
08:30 - 18:58
LGW
-
SJU
38h 28m2 stops
Multiple Airlines Logo
08:50 - 06:00
SJU
-
LGW
17h 10m1 stop
£527Multiple Airlines
Sat, 31 Jan - Wed, 11 Feb
Multiple Airlines Logo
14:00 - 09:47
LGW
-
SJU
23h 47m1 stop
Multiple Airlines Logo
08:50 - 06:00
SJU
-
LGW
17h 10m1 stop
£528Multiple Airlines
Fri, 16 Jan - Tue, 27 Jan
JetBlue Logo
09:20 - 10:02
LHR
-
SJU
28h 42m1 stop
JetBlue Logo
05:55 - 20:45
SJU
-
LHR
34h 50m1 stop
£534JetBlue
Sun, 1 Mar - Sun, 8 Mar
JetBlue Logo
12:20 - 23:50
LHR
-
SJU
15h 30m1 stop
JetBlue Logo
14:20 - 09:30
SJU
-
LHR
15h 10m1 stop
£537JetBlue
Fri, 16 Jan - Wed, 28 Jan
Iberia Logo
19:15 - 16:35
LCY
-
SJU
25h 20m1 stop
Iberia Logo
21:25 - 08:50
SJU
-
LCY
31h 25m1 stop
£858Iberia
Mon, 26 Jan - Thu, 5 Feb
Iberia Logo
09:10 - 19:55
LCY
-
SJU
14h 45m1 stop
Iberia Logo
21:25 - 14:35
SJU
-
LCY
13h 10m1 stop
£868Iberia
Mon, 19 Jan - Mon, 26 Jan
British Airways Logo
06:05 - 19:55
EDI
-
SJU
17h 50m2 stops
British Airways Logo
16:50 - 15:15
SJU
-
EDI
18h 25m2 stops
£901British Airways
Thu, 26 Feb - Mon, 2 Mar
British Airways Logo
08:20 - 23:44
EDI
-
SJU
19h 24m2 stops
British Airways Logo
16:50 - 18:10
SJU
-
EDI
21h 20m2 stops
£907British Airways
Thu, 26 Feb - Mon, 2 Mar
Icelandair Logo
12:35 - 09:58
GLA
-
SJU
25h 23m2 stops
Icelandair Logo
11:06 - 09:55
SJU
-
GLA
18h 49m2 stops
£1,256Icelandair
Mon, 26 Jan - Thu, 29 Jan

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
26 Jan
LHR08:15London Heathrow
29h 43m
2 stops
SJU09:58San Juan Luis Munoz Marin Intl
5 Feb
SJU11:06San Juan Luis Munoz Marin Intl
27h 49m
2 stops
LHR18:55London Heathrow
£652
Find similar
TAP AIR PORTUGAL
3 Mar
LHR06:00London Heathrow
23h 59m
2 stops
SJU01:59San Juan Luis Munoz Marin Intl
11 Mar
SJU05:01San Juan Luis Munoz Marin Intl
30h 29m
2 stops
LHR15:30London Heathrow
£654
Find similar
TAP AIR PORTUGAL
29 Jan
LHR12:25London Heathrow
39h 23m
2 stops
SJU23:48San Juan Luis Munoz Marin Intl
5 Feb
SJU11:06San Juan Luis Munoz Marin Intl
26h 24m
2 stops
LHR17:30London Heathrow
£655
Find similar

Lufthansa flights from United Kingdom to San Juan

Our best Lufthansa deals on United Kingdom to San Juan flight tickets
Lufthansa
26 Jan
LCY09:50London City
18h 46m
2 stops
SJU00:36San Juan Luis Munoz Marin Intl
5 Feb
SJU07:45San Juan Luis Munoz Marin Intl
29h 55m
2 stops
LCY17:40London City
£862
Find similar
Lufthansa
30 Dec
LHR10:00London Heathrow
24h 11m
1 stop
SJU06:11San Juan Luis Munoz Marin Intl
8 Jan
SJU07:45San Juan Luis Munoz Marin Intl
18h 10m
2 stops
LHR05:55London Heathrow
£902
Find similar
Lufthansa
30 Dec
LHR12:05London Heathrow
22h 06m
1 stop
SJU06:11San Juan Luis Munoz Marin Intl
8 Jan
SJU07:45San Juan Luis Munoz Marin Intl
18h 10m
2 stops
LHR05:55London Heathrow
£949
Find similar

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 22 December 2025.
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

LGW - SJU

LGWSJU

London Gatwick

Thu 22/1

14:00-10:24

1 stop24h 24m

San Juan Luis Munoz Marin Intl

Thu 29/1

17:50-15:50

2 stops18h 00m

£526

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sat 31/1

08:30-18:58

2 stops38h 28m

San Juan Luis Munoz Marin Intl

Wed 11/2

08:50-06:00

1 stop17h 10m

£527

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Fri 16/1

14:00-09:47

1 stop23h 47m

San Juan Luis Munoz Marin Intl

Tue 27/1

08:50-06:00

1 stop17h 10m

£528

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sun 1/3

09:20-10:02

1 stop28h 42m

San Juan Luis Munoz Marin Intl

Sun 8/3

05:55-20:45

1 stop34h 50m

£534

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 16/1

12:20-23:50

1 stop15h 30m

San Juan Luis Munoz Marin Intl

Wed 28/1

14:20-09:30

1 stop15h 10m

£537

LondonSan Juan

LCY - SJU

LCYSJU

London City

Mon 26/1

19:15-16:35

1 stop25h 20m

San Juan Luis Munoz Marin Intl

Thu 5/2

21:25-08:50

1 stop31h 25m

£858

LondonSan Juan

LCY - SJU

LCYSJU

London City

Mon 19/1

09:10-19:55

1 stop14h 45m

San Juan Luis Munoz Marin Intl

Mon 26/1

21:25-14:35

1 stop13h 10m

£868

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Thu 26/2

06:05-19:55

2 stops17h 50m

San Juan Luis Munoz Marin Intl

Mon 2/3

16:50-15:15

2 stops18h 25m

£901

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Thu 26/2

08:20-23:44

2 stops19h 24m

San Juan Luis Munoz Marin Intl

Mon 2/3

16:50-18:10

2 stops21h 20m

£907

GlasgowSan Juan

GLA - SJU

GLASJU

Glasgow Intl

Mon 26/1

12:35-09:58

2 stops25h 23m

San Juan Luis Munoz Marin Intl

Thu 29/1

11:06-09:55

2 stops18h 49m

£1,256

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 September. Flight prices, which tend to average around £531, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to San Juan from United Kingdom during February instead. Flights to San Juan in February, while not as cheap as those in September, still average around £564.

What is the cheapest day to depart on your flight to San Juan?

The cheapest day to depart on your flight to San Juan is on a Monday when prices can be found for as low as £532. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to San Juan is Saturday, with ticket prices averaging around £648.

What is the cheapest time of day to depart on your flight to San Juan?

In the morning is the cheapest time of day to fly from United Kingdom to San Juan when you can find flight prices for as low as £588. Flying to San Juan in the morning is an ideal time because this is during off-peak travel hours. Flights in the afternoon are often more expensive, with an average ticket price of £840.

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 £649 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 £524 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.
Search flight deals

  • 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 £333Free CancellationRating
7.5
677 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £440Free CancellationRating
7.2
2,896 reviews
Search JetBlue flights
FinnairPriceFrom £451Free CancellationRating
7.6
1,339 reviews
Search Finnair flights
IcelandairPriceFrom £487Free CancellationRating
7.0
592 reviews
Search Icelandair flights
IberiaPriceFrom £502Free CancellationRating
7.0
3,055 reviews
Search Iberia flights
British AirwaysPriceFrom £540Free CancellationRating
6.7
7,605 reviews
Search British Airways flights
Aer LingusPriceFrom £658Free CancellationRating
7.2
1,410 reviews
Search Aer Lingus flights
KLMPriceFrom £870Free CancellationRating
7.7
1,432 reviews
Search KLM 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