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Cheap flights from the United Kingdom to San Juan from £329

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 1/6. 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 - 21:32
LGW
-
SJU
14h 12m
1 stop
JetBlue Logo
16:55 - 09:35
SJU
-
LGW
11h 40m
1 stop
£578JetBlue
Wed, 2 Sep - Mon, 7 Sep
JetBlue Logo
12:20 - 22:12
LGW
-
SJU
14h 52m
1 stop
JetBlue Logo
16:53 - 09:35
SJU
-
LGW
11h 42m
1 stop
£587JetBlue
Sat, 6 Jun - Mon, 15 Jun
JetBlue Logo
12:20 - 21:42
LGW
-
SJU
14h 22m
1 stop
JetBlue Logo
13:27 - 09:35
SJU
-
LGW
15h 08m
1 stop
£595JetBlue
Tue, 2 Jun - Wed, 10 Jun
Multiple Airlines Logo
06:00 - 15:55
STN
-
SJU
14h 55m
1 stop
Multiple Airlines Logo
17:25 - 11:10
SJU
-
STN
12h 45m
1 stop
£671Multiple Airlines
Thu, 4 Jun - Thu, 11 Jun
Multiple Airlines Logo
08:20 - 18:50
STN
-
SJU
15h 30m
1 stop
Multiple Airlines Logo
20:40 - 14:20
SJU
-
STN
12h 40m
1 stop
£711Multiple Airlines
Wed, 3 Jun - Wed, 10 Jun
British Airways Logo
09:35 - 18:50
LCY
-
SJU
14h 15m
1 stop
British Airways Logo
20:25 - 15:15
SJU
-
LCY
13h 50m
1 stop
£908British Airways
Tue, 8 Sep - Tue, 22 Sep
Aer Lingus Logo
19:25 - 16:40
LCY
-
SJU
25h 15m
2 stops
Aer Lingus Logo
18:10 - 21:30
SJU
-
LCY
23h 20m
2 stops
£982Aer Lingus
Mon, 26 Oct - Mon, 23 Nov
Aer Lingus Logo
16:10 - 21:42
NCL
-
SJU
34h 32m
2 stops
Aer Lingus Logo
20:40 - 08:15
SJU
-
NCL
30h 35m
2 stops
£1,004Aer Lingus
Thu, 28 May - Thu, 11 Jun
British Airways Logo
07:50 - 20:00
LCY
-
SJU
16h 10m
1 stop
British Airways Logo
21:35 - 14:05
SJU
-
LCY
12h 30m
1 stop
£1,092British Airways
Thu, 5 Nov - Wed, 11 Nov
Iberia Logo
09:35 - 18:50
LCY
-
SJU
14h 15m
1 stop
Iberia Logo
20:25 - 15:15
SJU
-
LCY
13h 50m
1 stop
£1,110Iberia
Wed, 10 Jun - Tue, 8 Sep

JetBlue flights from United Kingdom to San Juan

Our best JetBlue deals on United Kingdom to San Juan flight tickets
JetBlue
2 Sept
LGW12:20London Gatwick
14h 12m
1 stop
SJU21:32San Juan Luis Munoz Marin Intl
7 Sept
SJU16:55San Juan Luis Munoz Marin Intl
11h 40m
1 stop
LGW09:35London Gatwick
£578
JetBlue
6 Jun
LGW12:20London Gatwick
14h 52m
1 stop
SJU22:12San Juan Luis Munoz Marin Intl
15 Jun
SJU16:53San Juan Luis Munoz Marin Intl
11h 42m
1 stop
LGW09:35London Gatwick
£587
JetBlue
2 Jun
LGW12:20London Gatwick
14h 22m
1 stop
SJU21:42San Juan Luis Munoz Marin Intl
10 Jun
SJU13:27San Juan Luis Munoz Marin Intl
15h 08m
1 stop
LGW09:35London Gatwick
£595

TAP AIR PORTUGAL flights from United Kingdom to San Juan

Our best TAP AIR PORTUGAL deals on United Kingdom to San Juan flight tickets
TAP AIR PORTUGAL
5 Jun
LHR08:40London Heathrow
18h 02m
1 stop
SJU21:42San Juan Luis Munoz Marin Intl
12 Jun
SJU06:00San Juan Luis Munoz Marin Intl
19h 30m
1 stop
LHR06:30London Heathrow
£669
TAP AIR PORTUGAL
22 Oct
LHR11:20London Heathrow
30h 48m
2 stops
SJU13:08San Juan Luis Munoz Marin Intl
31 Oct
SJU06:00San Juan Luis Munoz Marin Intl
26h 40m
2 stops
LHR12:40London Heathrow
£724
TAP AIR PORTUGAL
16 May
LHR08:40London Heathrow
18h 21m
1 stop
SJU22:01San Juan Luis Munoz Marin Intl
23 May
SJU13:27San Juan Luis Munoz Marin Intl
12h 03m
1 stop
LHR06:30London Heathrow
£733

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 11 May 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
Fastest return journey

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Wed 2/9

12:20-21:32

1 stop14h 12m

San Juan Luis Munoz Marin Intl

Mon 7/9

16:55-09:35

1 stop11h 40m

£578

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sat 6/6

12:20-22:12

1 stop14h 52m

San Juan Luis Munoz Marin Intl

Mon 15/6

16:53-09:35

1 stop11h 42m

£587

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 2/6

12:20-21:42

1 stop14h 22m

San Juan Luis Munoz Marin Intl

Wed 10/6

13:27-09:35

1 stop15h 08m

£595

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Thu 4/6

06:00-15:55

1 stop14h 55m

San Juan Luis Munoz Marin Intl

Thu 11/6

17:25-11:10

1 stop12h 45m

£671

LondonSan Juan

STN - SJU

STNSJU

London Stansted

Wed 3/6

08:20-18:50

1 stop15h 30m

San Juan Luis Munoz Marin Intl

Wed 10/6

20:40-14:20

1 stop12h 40m

£711

LondonSan Juan

LCY - SJU

LCYSJU

London City

Tue 8/9

09:35-18:50

1 stop14h 15m

San Juan Luis Munoz Marin Intl

Tue 22/9

20:25-15:15

1 stop13h 50m

£908

LondonSan Juan

LCY - SJU

LCYSJU

London City

Mon 26/10

19:25-16:40

2 stops25h 15m

San Juan Luis Munoz Marin Intl

Mon 23/11

18:10-21:30

2 stops23h 20m

£982

Newcastle upon TyneSan Juan

NCL - SJU

NCLSJU

Newcastle upon Tyne

Thu 28/5

16:10-21:42

2 stops34h 32m

San Juan Luis Munoz Marin Intl

Thu 11/6

20:40-08:15

2 stops30h 35m

£1,004

LondonSan Juan

LCY - SJU

LCYSJU

London City

Thu 5/11

07:50-20:00

1 stop16h 10m

San Juan Luis Munoz Marin Intl

Wed 11/11

21:35-14:05

1 stop12h 30m

£1,092

LondonSan Juan

LCY - SJU

LCYSJU

London City

Wed 10/6

09:35-18:50

1 stop14h 15m

San Juan Luis Munoz Marin Intl

Tue 8/9

20:25-15:15

1 stop13h 50m

£1,110

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 July. Flight prices, which tend to average around £139, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of July, then book flights to San Juan from United Kingdom during June instead. Flights to San Juan in June, while not as cheap as those in July, still average around £181.

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 £654 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 £514 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

13h 50m

Direct flights

None
The fastest flight from United Kingdom to San Juan takes 13h 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

Frequently asked questions about flying from the United Kingdom to San Juan

  • 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 £328Free CancellationRating
7.4
688 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £417Free CancellationRating
7.1
2,974 reviews
Search JetBlue flights
FinnairPriceFrom £482Free CancellationRating
7.6
1,393 reviews
Search Finnair flights
IcelandairPriceFrom £486Free CancellationRating
7.0
653 reviews
Search Icelandair flights
AviancaPriceFrom £530Free CancellationRating
6.5
2,522 reviews
Search Avianca flights
British AirwaysPriceFrom £531Free CancellationRating
6.7
7,972 reviews
Search British Airways flights
IberiaPriceFrom £574Free CancellationRating
7.0
3,215 reviews
Search Iberia flights
Aer LingusPriceFrom £647Free CancellationRating
7.3
1,551 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

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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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