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Cheap flights from the United Kingdom to San Juan from £260

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 19/1. 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
12:20 - 22:31
LHR
-
SJU
14h 11m1 stop
JetBlue Logo
04:15 - 21:40
SJU
-
LHR
13h 25m1 stop
£470JetBlue
Tue, 3 Mar - Tue, 10 Mar
Multiple Airlines Logo
13:00 - 17:58
LGW
-
SJU
32h 58m1 stop
Multiple Airlines Logo
18:39 - 06:00
SJU
-
LGW
31h 21m2 stops
£476Multiple Airlines
Tue, 3 Mar - Tue, 10 Mar
Icelandair Logo
12:35 - 02:25
GLA
-
SJU
17h 50m2 stops
Icelandair Logo
11:03 - 09:55
SJU
-
GLA
18h 52m2 stops
£769Icelandair
Mon, 2 Feb - Fri, 6 Feb
Icelandair Logo
12:35 - 02:25
GLA
-
SJU
17h 50m2 stops
Icelandair Logo
14:00 - 09:55
SJU
-
GLA
15h 55m2 stops
£774Icelandair
Mon, 2 Feb - Fri, 6 Feb
British Airways Logo
08:20 - 23:56
EDI
-
SJU
19h 36m2 stops
British Airways Logo
14:28 - 10:10
SJU
-
EDI
15h 42m2 stops
£905British Airways
Thu, 5 Feb - Mon, 9 Feb
British Airways Logo
08:20 - 23:56
EDI
-
SJU
19h 36m2 stops
British Airways Logo
14:28 - 13:15
SJU
-
EDI
18h 47m2 stops
£906British Airways
Thu, 5 Feb - Mon, 9 Feb
Iberia Logo
19:15 - 19:55
LCY
-
SJU
28h 40m1 stop
Iberia Logo
18:10 - 14:05
SJU
-
LCY
15h 55m1 stop
£907Iberia
Tue, 3 Mar - Tue, 10 Mar
Iberia Logo
19:15 - 16:35
LCY
-
SJU
25h 20m1 stop
Iberia Logo
21:25 - 14:05
SJU
-
LCY
12h 40m1 stop
£917Iberia
Mon, 26 Jan - Thu, 5 Feb
United Airlines Logo
09:25 - 21:26
EDI
-
SJU
40h 01m2 stops
United Airlines Logo
08:30 - 15:00
SJU
-
EDI
26h 30m2 stops
£1,017United Airlines
Sun, 15 Feb - Sun, 22 Feb
United Airlines Logo
09:25 - 06:11
EDI
-
SJU
24h 46m2 stops
United Airlines Logo
14:10 - 07:55
SJU
-
EDI
13h 45m1 stop
£1,211United Airlines
Sun, 15 Feb - Sun, 22 Feb

Avianca flights from United Kingdom to San Juan

Our best Avianca deals on United Kingdom to San Juan flight tickets
Avianca
8 Mar
LHR21:40London Heathrow
23h 25m
1 stop
SJU17:05San Juan Luis Munoz Marin Intl
15 Mar
SJU18:30San Juan Luis Munoz Marin Intl
16h 05m
1 stop
LHR14:35London Heathrow
£543
Find similar
Avianca
19 May
LHR22:05London Heathrow
23h 45m
1 stop
SJU16:50San Juan Luis Munoz Marin Intl
30 May
SJU13:15San Juan Luis Munoz Marin Intl
21h 20m
1 stop
LHR15:35London Heathrow
£546
Find similar
Avianca
20 May
LHR22:05London Heathrow
18h 50m
1 stop
SJU11:55San Juan Luis Munoz Marin Intl
30 May
SJU18:15San Juan Luis Munoz Marin Intl
16h 20m
1 stop
LHR15:35London Heathrow
£554
Find similar

JetBlue flights from United Kingdom to San Juan

Our best JetBlue deals on United Kingdom to San Juan flight tickets
JetBlue
3 Mar
LHR12:20London Heathrow
14h 11m
1 stop
SJU22:31San Juan Luis Munoz Marin Intl
10 Mar
SJU04:15San Juan Luis Munoz Marin Intl
13h 25m
1 stop
LHR21:40London Heathrow
£470
Find similar
JetBlue
4 Mar
LHR12:20London Heathrow
19h 31m
1 stop
SJU03:51San Juan Luis Munoz Marin Intl
11 Mar
SJU04:15San Juan Luis Munoz Marin Intl
13h 25m
1 stop
LHR21:40London Heathrow
£509
Find similar
JetBlue
26 Jan
LHR08:05London Heathrow
19h 45m
1 stop
SJU23:50San Juan Luis Munoz Marin Intl
8 Feb
SJU09:25San Juan Luis Munoz Marin Intl
20h 05m
1 stop
LHR09:30London Heathrow
£511
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 1 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

Tue 3/3

12:20-22:31

1 stop14h 11m

San Juan Luis Munoz Marin Intl

Tue 10/3

04:15-21:40

1 stop13h 25m

£470

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 3/3

13:00-17:58

1 stop32h 58m

San Juan Luis Munoz Marin Intl

Tue 10/3

18:39-06:00

2 stops31h 21m

£476

GlasgowSan Juan

GLA - SJU

GLASJU

Glasgow Intl

Mon 2/2

12:35-02:25

2 stops17h 50m

San Juan Luis Munoz Marin Intl

Fri 6/2

11:03-09:55

2 stops18h 52m

£769

GlasgowSan Juan

GLA - SJU

GLASJU

Glasgow Intl

Mon 2/2

12:35-02:25

2 stops17h 50m

San Juan Luis Munoz Marin Intl

Fri 6/2

14:00-09:55

2 stops15h 55m

£774

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Thu 5/2

08:20-23:56

2 stops19h 36m

San Juan Luis Munoz Marin Intl

Mon 9/2

14:28-10:10

2 stops15h 42m

£905

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Thu 5/2

08:20-23:56

2 stops19h 36m

San Juan Luis Munoz Marin Intl

Mon 9/2

14:28-13:15

2 stops18h 47m

£906

LondonSan Juan

LCY - SJU

LCYSJU

London City

Tue 3/3

19:15-19:55

1 stop28h 40m

San Juan Luis Munoz Marin Intl

Tue 10/3

18:10-14:05

1 stop15h 55m

£907

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

21:25-14:05

1 stop12h 40m

£917

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Sun 15/2

09:25-21:26

2 stops40h 01m

San Juan Luis Munoz Marin Intl

Sun 22/2

08:30-15:00

2 stops26h 30m

£1,017

EdinburghSan Juan

EDI - SJU

EDISJU

Edinburgh Turnhouse

Sun 15/2

09:25-06:11

2 stops24h 46m

San Juan Luis Munoz Marin Intl

Sun 22/2

14:10-07:55

1 stop13h 45m

£1,211

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 £560.

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 £645 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 £520 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 £343Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £436Free CancellationRating
7.2
2,901 reviews
Search JetBlue flights
FinnairPriceFrom £448Free CancellationRating
7.6
1,343 reviews
Search Finnair flights
IcelandairPriceFrom £483Free CancellationRating
7.1
593 reviews
Search Icelandair flights
IberiaPriceFrom £499Free CancellationRating
7.0
3,058 reviews
Search Iberia flights
British AirwaysPriceFrom £537Free CancellationRating
6.7
7,636 reviews
Search British Airways flights
Aer LingusPriceFrom £654Free CancellationRating
7.2
1,418 reviews
Search Aer Lingus flights
KLMPriceFrom £863Free CancellationRating
7.7
1,435 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