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Cheap flights from the United Kingdom to San Juan from £279

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 4/5. 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

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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
08:40 - 22:08
LHR
-
SJU
18h 28m
1 stop
JetBlue Logo
19:58 - 20:45
SJU
-
LHR
19h 47m
1 stop
£536JetBlue
Mon, 13 Apr - Mon, 27 Apr
JetBlue Logo
11:55 - 00:07
LHR
-
SJU
17h 12m
1 stop
JetBlue Logo
21:59 - 20:45
SJU
-
LHR
17h 46m
1 stop
£537JetBlue
Tue, 28 Apr - Sun, 10 May
Multiple Airlines Logo
14:00 - 23:24
LGW
-
SJU
14h 24m
1 stop
Multiple Airlines Logo
17:15 - 10:00
SJU
-
LGW
35h 45m
2 stops
£555Multiple Airlines
Sat, 2 May - Sat, 9 May
Aer Lingus Logo
08:10 - 01:34
BHX
-
SJU
22h 24m
2 stops
Aer Lingus Logo
05:01 - 07:40
SJU
-
BHX
21h 39m
2 stops
£933Aer Lingus
Tue, 7 Apr - Tue, 14 Apr
Aer Lingus Logo
15:30 - 20:56
EDI
-
SJU
34h 26m
2 stops
Aer Lingus Logo
11:50 - 19:50
SJU
-
EDI
27h 00m
2 stops
£1,043Aer Lingus
Mon, 17 Aug - Mon, 31 Aug
United Airlines Logo
09:40 - 21:24
EDI
-
SJU
16h 44m
2 stops
United Airlines Logo
07:40 - 08:05
SJU
-
EDI
19h 25m
2 stops
£1,153United Airlines
Wed, 8 Apr - Wed, 15 Apr
United Airlines Logo
10:15 - 20:34
BHX
-
SJU
39h 19m
2 stops
United Airlines Logo
07:00 - 17:15
SJU
-
BHX
29h 15m
2 stops
£1,221United Airlines
Thu, 9 Apr - Thu, 16 Apr
Virgin Atlantic Logo
14:05 - 16:31
EDI
-
SJU
31h 26m
1 stop
Virgin Atlantic Logo
13:35 - 09:20
SJU
-
EDI
14h 45m
1 stop
£1,554Virgin Atlantic
Mon, 17 Aug - Mon, 31 Aug
British Airways Logo
11:25 - 23:41
EDI
-
SJU
17h 16m
1 stop
British Airways Logo
06:00 - 07:30
SJU
-
EDI
20h 30m
1 stop
£1,596British Airways
Mon, 17 Aug - Mon, 31 Aug
British Airways Logo
11:25 - 23:41
EDI
-
SJU
17h 16m
1 stop
British Airways Logo
06:00 - 07:30
SJU
-
EDI
20h 30m
1 stop
£1,598British Airways
Mon, 17 Aug - Mon, 31 Aug

Aer Lingus flights from United Kingdom to San Juan

Our best Aer Lingus deals on United Kingdom to San Juan flight tickets
Aer Lingus
7 Apr
BHX08:10Birmingham
22h 24m
2 stops
SJU01:34San Juan Luis Munoz Marin Intl
14 Apr
SJU05:01San Juan Luis Munoz Marin Intl
21h 39m
2 stops
BHX07:40Birmingham
£933
Aer Lingus
17 Aug
EDI15:30Edinburgh Turnhouse
34h 26m
2 stops
SJU20:56San Juan Luis Munoz Marin Intl
31 Aug
SJU11:50San Juan Luis Munoz Marin Intl
27h 00m
2 stops
EDI19:50Edinburgh Turnhouse
£1,043
Aer Lingus
17 Aug
EDI15:30Edinburgh Turnhouse
34h 26m
2 stops
SJU20:56San Juan Luis Munoz Marin Intl
31 Aug
SJU11:50San Juan Luis Munoz Marin Intl
27h 00m
2 stops
EDI19:50Edinburgh Turnhouse
£1,045

United Airlines flights from United Kingdom to San Juan

Our best United Airlines deals on United Kingdom to San Juan flight tickets
United Airlines
22 Apr
MAN06:05Manchester
43h 33m
2 stops
SJU20:38San Juan Luis Munoz Marin Intl
29 Apr
SJU07:20San Juan Luis Munoz Marin Intl
29h 15m
2 stops
MAN17:35Manchester
£1,046
United Airlines
23 Apr
MAN05:55Manchester
44h 29m
2 stops
SJU21:24San Juan Luis Munoz Marin Intl
30 Apr
SJU16:55San Juan Luis Munoz Marin Intl
35h 55m
2 stops
MAN09:50Manchester
£1,074
United Airlines
19 Apr
MAN06:05Manchester
20h 19m
3 stops
SJU21:24San Juan Luis Munoz Marin Intl
29 Apr
SJU07:20San Juan Luis Munoz Marin Intl
21h 30m
2 stops
MAN09:50Manchester
£1,081

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 13 March 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

Mon 13/4

08:40-22:08

1 stop18h 28m

San Juan Luis Munoz Marin Intl

Mon 27/4

19:58-20:45

1 stop19h 47m

£536
Fastest return journey

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 28/4

11:55-00:07

1 stop17h 12m

San Juan Luis Munoz Marin Intl

Sun 10/5

21:59-20:45

1 stop17h 46m

£537

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sat 2/5

14:00-23:24

1 stop14h 24m

San Juan Luis Munoz Marin Intl

Sat 9/5

17:15-10:00

2 stops35h 45m

£555

BirminghamSan Juan

BHX - SJU

BHXSJU

Birmingham

Tue 7/4

08:10-01:34

2 stops22h 24m

San Juan Luis Munoz Marin Intl

Tue 14/4

05:01-07:40

2 stops21h 39m

£933

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Mon 17/8

15:30-20:56

2 stops34h 26m

San Juan Luis Munoz Marin Intl

Mon 31/8

11:50-19:50

2 stops27h 00m

£1,043

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Wed 8/4

09:40-21:24

2 stops16h 44m

San Juan Luis Munoz Marin Intl

Wed 15/4

07:40-08:05

2 stops19h 25m

£1,153

BirminghamSan Juan

BHX - SJU

BHXSJU

Birmingham

Thu 9/4

10:15-20:34

2 stops39h 19m

San Juan Luis Munoz Marin Intl

Thu 16/4

07:00-17:15

2 stops29h 15m

£1,221

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Mon 17/8

14:05-16:31

1 stop31h 26m

San Juan Luis Munoz Marin Intl

Mon 31/8

13:35-09:20

1 stop14h 45m

£1,554

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Mon 17/8

11:25-23:41

1 stop17h 16m

San Juan Luis Munoz Marin Intl

Mon 31/8

06:00-07:30

1 stop20h 30m

£1,596

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Mon 17/8

11:25-23:41

1 stop17h 16m

San Juan Luis Munoz Marin Intl

Mon 31/8

06:00-07:30

1 stop20h 30m

£1,598

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 £545, 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 £548.

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 £669 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

14h 00m

Direct flights

None
The fastest flight from United Kingdom to San Juan takes 14h 00m
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 £345Free CancellationRating
7.5
680 reviews
Search Virgin Atlantic flights
Aer LingusPriceFrom £366Free CancellationRating
7.2
1,475 reviews
Search Aer Lingus flights
JetBluePriceFrom £408Free CancellationRating
7.2
2,904 reviews
Search JetBlue flights
IcelandairPriceFrom £481Free CancellationRating
7.1
620 reviews
Search Icelandair flights
FinnairPriceFrom £491Free CancellationRating
7.6
1,371 reviews
Search Finnair flights
IberiaPriceFrom £557Free CancellationRating
7.0
3,134 reviews
Search Iberia flights
British AirwaysPriceFrom £608Free CancellationRating
6.7
7,784 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