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Cheap flights from the United Kingdom to San Juan from £276

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 7/2. 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
07:25 - 17:54LHR-SJU
14h 29m1 stop
JetBlue Logo
11:15 - 09:30SJU-LHR
18h 15m1 stop
£530JetBlue
Find Deal
Tue, 6 Jan - Thu, 22 Jan
Icelandair Logo
09:20 - 01:22LHR-SJU
20h 02m1 stop
Icelandair Logo
06:00 - 20:45SJU-LHR
34h 45m1 stop
£531Icelandair
Find Deal
Thu, 22 Jan - Sun, 8 Feb
JetBlue Logo
07:25 - 22:47LHR-SJU
19h 22m1 stop
JetBlue Logo
01:59 - 20:45SJU-LHR
13h 46m1 stop
£532JetBlue
Find Deal
Wed, 25 Mar - Sun, 29 Mar
Icelandair Logo
12:20 - 01:22LHR-SJU
17h 02m2 stops
Icelandair Logo
08:15 - 06:55SJU-LHR
18h 40m2 stops
£532Icelandair
Find Deal
Mon, 12 Jan - Mon, 26 Jan
JetBlue Logo
07:25 - 17:54LHR-SJU
14h 29m1 stop
JetBlue Logo
11:15 - 09:30SJU-LHR
18h 15m1 stop
£533JetBlue
Find Deal
Wed, 7 Jan - Tue, 20 Jan
Aer Lingus Logo
14:15 - 19:49MAN-SJU
33h 34m1 stop
Aer Lingus Logo
17:22 - 06:50SJU-MAN
33h 28m1 stop
£677Aer Lingus
Find Deal
Sat, 28 Feb - Mon, 9 Mar
Aer Lingus Logo
14:15 - 09:54MAN-SJU
23h 39m1 stop
Aer Lingus Logo
04:15 - 06:50SJU-MAN
22h 35m1 stop
£680Aer Lingus
Find Deal
Sat, 28 Feb - Mon, 9 Mar
Iberia Logo
09:10 - 19:55LCY-SJU
14h 45m1 stop
Iberia Logo
21:25 - 08:50SJU-LCY
31h 25m1 stop
£923Iberia
Find Deal
Mon, 26 Jan - Thu, 5 Feb
Iberia Logo
19:15 - 16:35LCY-SJU
25h 20m1 stop
Iberia Logo
21:25 - 14:35SJU-LCY
13h 10m1 stop
£925Iberia
Find Deal
Mon, 12 Jan - Mon, 26 Jan
Virgin Atlantic Logo
06:15 - 02:27NWI-SJU
24h 12m2 stops
Virgin Atlantic Logo
03:45 - 16:25SJU-NWI
32h 40m2 stops
£2,077Virgin Atlantic
Find Deal
Sat, 20 Dec - Sat, 27 Dec

JetBlue flights from United Kingdom to San Juan

Our best JetBlue deals on United Kingdom to San Juan flight tickets
JetBlue
6 Jan
LHR07:25London Heathrow
14h 29m
1 stop
SJU17:54San Juan Luis Munoz Marin Intl
22 Jan
SJU11:15San Juan Luis Munoz Marin Intl
18h 15m
1 stop
LHR09:30London Heathrow
£530
Find similar
JetBlue
25 Mar
LHR07:25London Heathrow
19h 22m
1 stop
SJU22:47San Juan Luis Munoz Marin Intl
29 Mar
SJU01:59San Juan Luis Munoz Marin Intl
13h 46m
1 stop
LHR20:45London Heathrow
£532
Find similar
JetBlue
7 Jan
LHR07:25London Heathrow
14h 29m
1 stop
SJU17:54San Juan Luis Munoz Marin Intl
20 Jan
SJU11:15San Juan Luis Munoz Marin Intl
18h 15m
1 stop
LHR09:30London Heathrow
£533
Find similar

Icelandair flights from United Kingdom to San Juan

Our best Icelandair deals on United Kingdom to San Juan flight tickets
Icelandair
22 Jan
LHR09:20London Heathrow
20h 02m
1 stop
SJU01:22San Juan Luis Munoz Marin Intl
8 Feb
SJU06:00San Juan Luis Munoz Marin Intl
34h 45m
1 stop
LHR20:45London Heathrow
£531
Find similar
Icelandair
12 Jan
LHR12:20London Heathrow
17h 02m
2 stops
SJU01:22San Juan Luis Munoz Marin Intl
26 Jan
SJU08:15San Juan Luis Munoz Marin Intl
18h 40m
2 stops
LHR06:55London Heathrow
£532
Find similar
Icelandair
12 Feb
LHR12:20London Heathrow
19h 34m
1 stop
SJU03:54San Juan Luis Munoz Marin Intl
18 Feb
SJU06:10San Juan Luis Munoz Marin Intl
20h 45m
1 stop
LHR06:55London Heathrow
£557
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 13 November 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

Tue 6/1

07:25-17:54

1 stop14h 29m

San Juan Luis Munoz Marin Intl

Thu 22/1

11:15-09:30

1 stop18h 15m

£530

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 22/1

09:20-01:22

1 stop20h 02m

San Juan Luis Munoz Marin Intl

Sun 8/2

06:00-20:45

1 stop34h 45m

£531

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 25/3

07:25-22:47

1 stop19h 22m

San Juan Luis Munoz Marin Intl

Sun 29/3

01:59-20:45

1 stop13h 46m

£532

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 12/1

12:20-01:22

2 stops17h 02m

San Juan Luis Munoz Marin Intl

Mon 26/1

08:15-06:55

2 stops18h 40m

£532

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 7/1

07:25-17:54

1 stop14h 29m

San Juan Luis Munoz Marin Intl

Tue 20/1

11:15-09:30

1 stop18h 15m

£533

ManchesterSan Juan

MAN - SJU

MANSJU

Manchester

Sat 28/2

14:15-19:49

1 stop33h 34m

San Juan Luis Munoz Marin Intl

Mon 9/3

17:22-06:50

1 stop33h 28m

£677

ManchesterSan Juan

MAN - SJU

MANSJU

Manchester

Sat 28/2

14:15-09:54

1 stop23h 39m

San Juan Luis Munoz Marin Intl

Mon 9/3

04:15-06:50

1 stop22h 35m

£680

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

£923

LondonSan Juan

LCY - SJU

LCYSJU

London City

Mon 12/1

19:15-16:35

1 stop25h 20m

San Juan Luis Munoz Marin Intl

Mon 26/1

21:25-14:35

1 stop13h 10m

£925

NorwichSan Juan

NWI - SJU

NWISJU

Norwich Arpt

Sat 20/12

06:15-02:27

2 stops24h 12m

San Juan Luis Munoz Marin Intl

Sat 27/12

03:45-16:25

2 stops32h 40m

£2,077

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 £543, 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 January instead. Flights to San Juan in January, while not as cheap as those in September, still average around £570.

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 £542. 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 £660.

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 £599. 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 £856.

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 £653 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 £534 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

Direct flights

None
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 £340Free CancellationRating
7.5
673 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £448Free CancellationRating
7.2
2,907 reviews
Search JetBlue flights
FinnairPriceFrom £459Free CancellationRating
7.6
1,335 reviews
Search Finnair flights
IcelandairPriceFrom £484Free CancellationRating
7.1
578 reviews
Search Icelandair flights
IberiaPriceFrom £516Free CancellationRating
7.0
3,009 reviews
Search Iberia flights
British AirwaysPriceFrom £551Free CancellationRating
6.7
7,513 reviews
Search British Airways flights
Aer LingusPriceFrom £671Free CancellationRating
7.2
1,370 reviews
Search Aer Lingus flights
KLMPriceFrom £886Free CancellationRating
7.7
1,410 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.

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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