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Cheap flights from the United Kingdom to San Juan from £230

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 27/2. 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
08:05 - 02:28
LHR
-
SJU
22h 23m
1 stop
JetBlue Logo
05:10 - 21:40
SJU
-
LHR
12h 30m
1 stop
£406JetBlue
Fri, 20 Feb - Thu, 26 Feb
JetBlue Logo
12:20 - 03:50
LHR
-
SJU
19h 30m
1 stop
JetBlue Logo
05:15 - 06:55
SJU
-
LHR
21h 40m
1 stop
£413JetBlue
Thu, 5 Mar - Tue, 10 Mar
JetBlue Logo
09:20 - 01:50
LHR
-
SJU
20h 30m
1 stop
JetBlue Logo
12:15 - 06:55
SJU
-
LHR
14h 40m
1 stop
£415JetBlue
Tue, 17 Feb - Wed, 25 Feb
Iberia Logo
07:50 - 19:55
LCY
-
SJU
16h 05m
1 stop
Iberia Logo
18:10 - 14:05
SJU
-
LCY
15h 55m
1 stop
£852Iberia
Wed, 25 Feb - Thu, 5 Mar
British Airways Logo
06:30 - 19:55
NCL
-
SJU
17h 25m
2 stops
British Airways Logo
11:38 - 11:25
SJU
-
NCL
19h 47m
2 stops
£950British Airways
Thu, 5 Feb - Mon, 9 Feb
British Airways Logo
06:30 - 19:55
NCL
-
SJU
17h 25m
2 stops
British Airways Logo
13:24 - 11:25
SJU
-
NCL
18h 01m
2 stops
£951British Airways
Thu, 5 Feb - Mon, 9 Feb
American Airlines Logo
09:35 - 00:17
NCL
-
SJU
19h 42m
2 stops
American Airlines Logo
14:25 - 11:30
SJU
-
NCL
16h 05m
2 stops
£1,048American Airlines
Wed, 10 Jun - Sun, 14 Jun
American Airlines Logo
09:35 - 00:17
NCL
-
SJU
19h 42m
2 stops
American Airlines Logo
14:41 - 15:30
SJU
-
NCL
19h 49m
2 stops
£1,049American Airlines
Wed, 10 Jun - Sun, 14 Jun
United Airlines Logo
06:00 - 21:26
BHX
-
SJU
43h 26m
2 stops
United Airlines Logo
16:52 - 12:35
SJU
-
BHX
39h 43m
2 stops
£1,280United Airlines
Thu, 29 Jan - Mon, 2 Feb
United Airlines Logo
06:00 - 22:22
BHX
-
SJU
20h 22m
2 stops
United Airlines Logo
13:10 - 12:35
SJU
-
BHX
19h 25m
2 stops
£1,332United Airlines
Thu, 5 Mar - Thu, 12 Mar

JetBlue flights from United Kingdom to San Juan

Our best JetBlue deals on United Kingdom to San Juan flight tickets
JetBlue
20 Feb
LHR08:05London Heathrow
22h 23m
1 stop
SJU02:28San Juan Luis Munoz Marin Intl
26 Feb
SJU05:10San Juan Luis Munoz Marin Intl
12h 30m
1 stop
LHR21:40London Heathrow
£406
JetBlue
5 Mar
LHR12:20London Heathrow
19h 30m
1 stop
SJU03:50San Juan Luis Munoz Marin Intl
10 Mar
SJU05:15San Juan Luis Munoz Marin Intl
21h 40m
1 stop
LHR06:55London Heathrow
£413
JetBlue
17 Feb
LHR09:20London Heathrow
20h 30m
1 stop
SJU01:50San Juan Luis Munoz Marin Intl
25 Feb
SJU12:15San Juan Luis Munoz Marin Intl
14h 40m
1 stop
LHR06:55London Heathrow
£415

Iberia flights from United Kingdom to San Juan

Our best Iberia deals on United Kingdom to San Juan flight tickets
Iberia
22 Feb
LHR09:15London Heathrow
14h 40m
1 stop
SJU19:55San Juan Luis Munoz Marin Intl
2 Mar
SJU21:25San Juan Luis Munoz Marin Intl
15h 50m
1 stop
LHR17:15London Heathrow
£500
Iberia
21 Feb
LHR09:15London Heathrow
14h 40m
1 stop
SJU19:55San Juan Luis Munoz Marin Intl
1 Mar
SJU18:10San Juan Luis Munoz Marin Intl
19h 05m
1 stop
LHR17:15London Heathrow
£539
Iberia
23 Feb
LHR10:45London Heathrow
13h 10m
1 stop
SJU19:55San Juan Luis Munoz Marin Intl
1 Mar
SJU18:10San Juan Luis Munoz Marin Intl
12h 25m
1 stop
LHR10:35London Heathrow
£558

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 20 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

Fri 20/2

08:05-02:28

1 stop22h 23m

San Juan Luis Munoz Marin Intl

Thu 26/2

05:10-21:40

1 stop12h 30m

£406

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 5/3

12:20-03:50

1 stop19h 30m

San Juan Luis Munoz Marin Intl

Tue 10/3

05:15-06:55

1 stop21h 40m

£413

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 17/2

09:20-01:50

1 stop20h 30m

San Juan Luis Munoz Marin Intl

Wed 25/2

12:15-06:55

1 stop14h 40m

£415

LondonSan Juan

LCY - SJU

LCYSJU

London City

Wed 25/2

07:50-19:55

1 stop16h 05m

San Juan Luis Munoz Marin Intl

Thu 5/3

18:10-14:05

1 stop15h 55m

£852

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

11:38-11:25

2 stops19h 47m

£950

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

13:24-11:25

2 stops18h 01m

£951

Newcastle upon TyneSan Juan

NCL - SJU

NCLSJU

Newcastle upon Tyne

Wed 10/6

09:35-00:17

2 stops19h 42m

San Juan Luis Munoz Marin Intl

Sun 14/6

14:25-11:30

2 stops16h 05m

£1,048

Newcastle upon TyneSan Juan

NCL - SJU

NCLSJU

Newcastle upon Tyne

Wed 10/6

09:35-00:17

2 stops19h 42m

San Juan Luis Munoz Marin Intl

Sun 14/6

14:41-15:30

2 stops19h 49m

£1,049

BirminghamSan Juan

BHX - SJU

BHXSJU

Birmingham

Thu 29/1

06:00-21:26

2 stops43h 26m

San Juan Luis Munoz Marin Intl

Mon 2/2

16:52-12:35

2 stops39h 43m

£1,280

BirminghamSan Juan

BHX - SJU

BHXSJU

Birmingham

Thu 5/3

06:00-22:22

2 stops20h 22m

San Juan Luis Munoz Marin Intl

Thu 12/3

13:10-12:35

2 stops19h 25m

£1,332

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 £538, 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 £547.

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 £651 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 £523 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 40m

Direct flights

None
The fastest flight from United Kingdom to San Juan takes 14h 40m
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 £272Free CancellationRating
6.7
7,690 reviews
Search British Airways flights
Virgin AtlanticPriceFrom £344Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £433Free CancellationRating
7.2
2,891 reviews
Search JetBlue flights
FinnairPriceFrom £436Free CancellationRating
7.6
1,351 reviews
Search Finnair flights
IberiaPriceFrom £500Free CancellationRating
7.0
3,094 reviews
Search Iberia flights
IcelandairPriceFrom £505Free CancellationRating
7.1
602 reviews
Search Icelandair flights
Aer LingusPriceFrom £657Free CancellationRating
7.2
1,437 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