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Cheap flights from the United Kingdom to San Juan from £254

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 24/1. 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
09:20 - 22:48
LHR
-
SJU
17h 28m1 stop
JetBlue Logo
03:26 - 20:45
SJU
-
LHR
13h 19m1 stop
£535JetBlue
Mon, 9 Mar - Sun, 22 Mar
Multiple Airlines Logo
07:20 - 17:05
LGW
-
SJU
37h 45m2 stops
Multiple Airlines Logo
06:05 - 06:20
SJU
-
LGW
19h 15m1 stop
£535Multiple Airlines
Tue, 17 Mar - Mon, 30 Mar
Avianca Logo
21:40 - 11:35
LHR
-
SJU
17h 55m1 stop
Avianca Logo
18:30 - 14:35
SJU
-
LHR
16h 05m1 stop
£536Avianca
Mon, 2 Mar - Sun, 22 Mar
Multiple Airlines Logo
14:00 - 02:48
LGW
-
SJU
16h 48m1 stop
Multiple Airlines Logo
06:00 - 06:00
SJU
-
LGW
44h 00m2 stops
£539Multiple Airlines
Fri, 16 Jan - Sun, 25 Jan
Iberia Logo
09:10 - 19:55
LCY
-
SJU
14h 45m1 stop
Iberia Logo
21:25 - 08:50
SJU
-
LCY
31h 25m1 stop
£914Iberia
Mon, 26 Jan - Thu, 5 Feb
Iberia Logo
09:10 - 19:55
LCY
-
SJU
14h 45m1 stop
Iberia Logo
21:25 - 08:50
SJU
-
LCY
31h 25m1 stop
£915Iberia
Mon, 26 Jan - Thu, 5 Feb
Icelandair Logo
12:35 - 02:33
GLA
-
SJU
17h 58m2 stops
Icelandair Logo
13:44 - 09:55
SJU
-
GLA
16h 11m2 stops
£934Icelandair
Mon, 9 Feb - Wed, 18 Feb
British Airways Logo
06:50 - 23:44
LCY
-
SJU
20h 54m2 stops
British Airways Logo
21:25 - 14:05
SJU
-
LCY
12h 40m1 stop
£937British Airways
Fri, 27 Feb - Tue, 3 Mar
British Airways Logo
06:50 - 23:44
LCY
-
SJU
20h 54m2 stops
British Airways Logo
21:25 - 14:05
SJU
-
LCY
12h 40m1 stop
£938British Airways
Fri, 27 Feb - Tue, 3 Mar
Icelandair Logo
12:35 - 03:50
GLA
-
SJU
19h 15m2 stops
Icelandair Logo
13:44 - 09:55
SJU
-
GLA
16h 11m2 stops
£972Icelandair
Fri, 27 Feb - Tue, 3 Mar

Aer Lingus flights from United Kingdom to San Juan

Our best Aer Lingus deals on United Kingdom to San Juan flight tickets
Aer Lingus
15 Dec
MAN20:40Manchester
27h 15m
2 stops
SJU19:55San Juan Luis Munoz Marin Intl
1 Feb
SJU06:05San Juan Luis Munoz Marin Intl
21h 30m
2 stops
MAN07:35Manchester
£913
Find similar
Aer Lingus
15 Dec
MAN20:40Manchester
27h 15m
2 stops
SJU19:55San Juan Luis Munoz Marin Intl
1 Feb
SJU06:05San Juan Luis Munoz Marin Intl
21h 30m
2 stops
MAN07:35Manchester
£918
Find similar
Aer Lingus
6 Jan
MAN14:15Manchester
16h 10m
1 stop
SJU02:25San Juan Luis Munoz Marin Intl
27 Jan
SJU06:05San Juan Luis Munoz Marin Intl
20h 45m
1 stop
MAN06:50Manchester
£1,394
Find similar

JetBlue flights from United Kingdom to San Juan

Our best JetBlue deals on United Kingdom to San Juan flight tickets
JetBlue
9 Mar
LHR09:20London Heathrow
17h 28m
1 stop
SJU22:48San Juan Luis Munoz Marin Intl
22 Mar
SJU03:26San Juan Luis Munoz Marin Intl
13h 19m
1 stop
LHR20:45London Heathrow
£535
Find similar
JetBlue
7 Feb
LHR12:20London Heathrow
18h 13m
1 stop
SJU02:33San Juan Luis Munoz Marin Intl
23 Feb
SJU23:50San Juan Luis Munoz Marin Intl
17h 50m
1 stop
LHR21:40London Heathrow
£544
Find similar
JetBlue
13 Mar
LHR12:20London Heathrow
17h 05m
1 stop
SJU01:25San Juan Luis Munoz Marin Intl
25 Mar
SJU05:01San Juan Luis Munoz Marin Intl
12h 39m
1 stop
LHR21:40London Heathrow
£547
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 12 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

LHR - SJU

LHRSJU

London Heathrow

Mon 9/3

09:20-22:48

1 stop17h 28m

San Juan Luis Munoz Marin Intl

Sun 22/3

03:26-20:45

1 stop13h 19m

£535

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 17/3

07:20-17:05

2 stops37h 45m

San Juan Luis Munoz Marin Intl

Mon 30/3

06:05-06:20

1 stop19h 15m

£535

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 2/3

21:40-11:35

1 stop17h 55m

San Juan Luis Munoz Marin Intl

Sun 22/3

18:30-14:35

1 stop16h 05m

£536

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Fri 16/1

14:00-02:48

1 stop16h 48m

San Juan Luis Munoz Marin Intl

Sun 25/1

06:00-06:00

2 stops44h 00m

£539

LondonSan Juan

LCY - SJU

LCYSJU

London City

Mon 26/1

09:10-19:55

1 stop14h 45m

San Juan Luis Munoz Marin Intl

Thu 5/2

21:25-08:50

1 stop31h 25m

£914

LondonSan Juan

LCY - SJU

LCYSJU

London City

Mon 26/1

09:10-19:55

1 stop14h 45m

San Juan Luis Munoz Marin Intl

Thu 5/2

21:25-08:50

1 stop31h 25m

£915

GlasgowSan Juan

GLA - SJU

GLASJU

Glasgow Intl

Mon 9/2

12:35-02:33

2 stops17h 58m

San Juan Luis Munoz Marin Intl

Wed 18/2

13:44-09:55

2 stops16h 11m

£934

LondonSan Juan

LCY - SJU

LCYSJU

London City

Fri 27/2

06:50-23:44

2 stops20h 54m

San Juan Luis Munoz Marin Intl

Tue 3/3

21:25-14:05

1 stop12h 40m

£937

LondonSan Juan

LCY - SJU

LCYSJU

London City

Fri 27/2

06:50-23:44

2 stops20h 54m

San Juan Luis Munoz Marin Intl

Tue 3/3

21:25-14:05

1 stop12h 40m

£938

GlasgowSan Juan

GLA - SJU

GLASJU

Glasgow Intl

Fri 27/2

12:35-03:50

2 stops19h 15m

San Juan Luis Munoz Marin Intl

Tue 3/3

13:44-09:55

2 stops16h 11m

£972

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 £529, 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 £531. 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 £587. 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 £839.

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 £648 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
675 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £439Free CancellationRating
7.2
2,898 reviews
Search JetBlue flights
FinnairPriceFrom £450Free CancellationRating
7.6
1,334 reviews
Search Finnair flights
IcelandairPriceFrom £486Free CancellationRating
7.0
589 reviews
Search Icelandair flights
IberiaPriceFrom £501Free CancellationRating
7.0
3,048 reviews
Search Iberia flights
British AirwaysPriceFrom £540Free CancellationRating
6.7
7,571 reviews
Search British Airways flights
Aer LingusPriceFrom £658Free CancellationRating
7.2
1,394 reviews
Search Aer Lingus flights
KLMPriceFrom £869Free 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