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Cheap flights from the United Kingdom to San Juan from £255

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 10/3. 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.
JetBlue Logo
09:20 - 01:50
LHR
-
SJU
20h 30m
1 stop
JetBlue Logo
23:59 - 20:45
SJU
-
LHR
16h 46m
1 stop
£396JetBlue
Wed, 18 Feb - Sat, 28 Feb
JetBlue Logo
12:20 - 04:11
LHR
-
SJU
19h 51m
1 stop
JetBlue Logo
23:40 - 20:45
SJU
-
LHR
17h 05m
1 stop
£399JetBlue
Sat, 28 Feb - Sat, 7 Mar
JetBlue Logo
12:20 - 02:28
LHR
-
SJU
18h 08m
1 stop
JetBlue Logo
06:10 - 06:55
SJU
-
LHR
20h 45m
1 stop
£402JetBlue
Wed, 18 Feb - Sat, 28 Feb
JetBlue Logo
09:20 - 00:58
LHR
-
SJU
19h 38m
1 stop
JetBlue Logo
14:25 - 09:30
SJU
-
LHR
15h 05m
1 stop
£411JetBlue
Tue, 24 Feb - Wed, 11 Mar
Aer Lingus Logo
09:50 - 03:51
MAN
-
SJU
22h 01m
2 stops
Aer Lingus Logo
06:55 - 07:35
SJU
-
MAN
20h 40m
2 stops
£665Aer Lingus
Wed, 25 Feb - Wed, 4 Mar
Iberia Logo
07:50 - 19:55
LCY
-
SJU
16h 05m
1 stop
Iberia Logo
21:25 - 14:05
SJU
-
LCY
12h 40m
1 stop
£856Iberia
Wed, 4 Mar - Wed, 18 Mar
Aer Lingus Logo
20:10 - 16:40
GLA
-
SJU
24h 30m
2 stops
Aer Lingus Logo
05:01 - 08:05
SJU
-
GLA
22h 04m
2 stops
£889Aer Lingus
Sun, 22 Mar - Sat, 4 Apr
British Airways Logo
09:00 - 23:52
NCL
-
SJU
18h 52m
2 stops
British Airways Logo
13:30 - 11:25
SJU
-
NCL
17h 55m
2 stops
£901British Airways
Thu, 12 Mar - Thu, 19 Mar
Icelandair Logo
12:35 - 02:27
GLA
-
SJU
17h 52m
2 stops
Icelandair Logo
15:25 - 13:25
SJU
-
GLA
17h 00m
2 stops
£935Icelandair
Wed, 25 Mar - Fri, 3 Apr
British Airways Logo
06:30 - 19:55
NCL
-
SJU
17h 25m
2 stops
British Airways Logo
17:51 - 18:40
SJU
-
NCL
20h 49m
2 stops
£943British Airways
Thu, 5 Feb - Mon, 9 Feb

Avianca flights from United Kingdom to San Juan

Our best Avianca deals on United Kingdom to San Juan flight tickets
Avianca
9 Mar
LHR21:40London Heathrow
23h 25m
1 stop
SJU17:05San Juan Luis Munoz Marin Intl
16 Mar
SJU18:30San Juan Luis Munoz Marin Intl
16h 05m
1 stop
LHR14:35London Heathrow
£534
Avianca
1 Jun
LHR22:05London Heathrow
23h 45m
1 stop
SJU16:50San Juan Luis Munoz Marin Intl
4 Jun
SJU13:15San Juan Luis Munoz Marin Intl
21h 20m
1 stop
LHR15:35London Heathrow
£551
Avianca
11 Feb
LHR21:40London Heathrow
17h 55m
1 stop
SJU11:35San Juan Luis Munoz Marin Intl
16 Feb
SJU18:30San Juan Luis Munoz Marin Intl
16h 05m
1 stop
LHR14:35London Heathrow
£565

British Airways flights from United Kingdom to San Juan

Our best British Airways deals on United Kingdom to San Juan flight tickets
British Airways
3 Feb
LCY09:10London City
14h 45m
1 stop
SJU19:55San Juan Luis Munoz Marin Intl
24 Feb
SJU21:25San Juan Luis Munoz Marin Intl
12h 40m
1 stop
LCY14:05London City
£837
British Airways
12 Feb
LCY07:50London City
12h 50m
1 stop
SJU16:40San Juan Luis Munoz Marin Intl
18 Feb
SJU21:25San Juan Luis Munoz Marin Intl
12h 40m
1 stop
LCY14:05London City
£897
British Airways
12 Mar
NCL09:00Newcastle upon Tyne
18h 52m
2 stops
SJU23:52San Juan Luis Munoz Marin Intl
19 Mar
SJU13:30San Juan Luis Munoz Marin Intl
17h 55m
2 stops
NCL11:25Newcastle upon Tyne
£901

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 27 January 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

Wed 18/2

09:20-01:50

1 stop20h 30m

San Juan Luis Munoz Marin Intl

Sat 28/2

23:59-20:45

1 stop16h 46m

£396

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 28/2

12:20-04:11

1 stop19h 51m

San Juan Luis Munoz Marin Intl

Sat 7/3

23:40-20:45

1 stop17h 05m

£399

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 18/2

12:20-02:28

1 stop18h 08m

San Juan Luis Munoz Marin Intl

Sat 28/2

06:10-06:55

1 stop20h 45m

£402

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 24/2

09:20-00:58

1 stop19h 38m

San Juan Luis Munoz Marin Intl

Wed 11/3

14:25-09:30

1 stop15h 05m

£411

ManchesterSan Juan

MAN - SJU

MANSJU

Manchester

Wed 25/2

09:50-03:51

2 stops22h 01m

San Juan Luis Munoz Marin Intl

Wed 4/3

06:55-07:35

2 stops20h 40m

£665

LondonSan Juan

LCY - SJU

LCYSJU

London City

Wed 4/3

07:50-19:55

1 stop16h 05m

San Juan Luis Munoz Marin Intl

Wed 18/3

21:25-14:05

1 stop12h 40m

£856

GlasgowSan Juan

GLA - SJU

GLASJU

Glasgow Intl

Sun 22/3

20:10-16:40

2 stops24h 30m

San Juan Luis Munoz Marin Intl

Sat 4/4

05:01-08:05

2 stops22h 04m

£889

Newcastle upon TyneSan Juan

NCL - SJU

NCLSJU

Newcastle upon Tyne

Thu 12/3

09:00-23:52

2 stops18h 52m

San Juan Luis Munoz Marin Intl

Thu 19/3

13:30-11:25

2 stops17h 55m

£901

GlasgowSan Juan

GLA - SJU

GLASJU

Glasgow Intl

Wed 25/3

12:35-02:27

2 stops17h 52m

San Juan Luis Munoz Marin Intl

Fri 3/4

15:25-13:25

2 stops17h 00m

£935

Newcastle upon TyneSan Juan

NCL - SJU

NCLSJU

Newcastle upon Tyne

Thu 5/2

06:30-19:55

2 stops17h 25m

San Juan Luis Munoz Marin Intl

Mon 9/2

17:51-18:40

2 stops20h 49m

£943

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 £528, 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 £535.

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 £640 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 £513 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 20m

Direct flights

None
The fastest flight from United Kingdom to San Juan takes 12h 20m
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
British AirwaysPriceFrom £267Free CancellationRating
6.7
7,702 reviews
Search British Airways flights
Virgin AtlanticPriceFrom £338Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £425Free CancellationRating
7.2
2,890 reviews
Search JetBlue flights
FinnairPriceFrom £426Free CancellationRating
7.6
1,356 reviews
Search Finnair flights
IcelandairPriceFrom £495Free CancellationRating
7.1
603 reviews
Search Icelandair flights
IberiaPriceFrom £507Free CancellationRating
7.0
3,098 reviews
Search Iberia flights
Aer LingusPriceFrom £644Free CancellationRating
7.2
1,442 reviews
Search Aer Lingus 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