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Cheap flights from the United Kingdom to San Juan from £247

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 26/1. 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.
Multiple Airlines Logo
13:00 - 18:58
LGW
-
SJU
33h 58m2 stops
Multiple Airlines Logo
15:19 - 10:00
SJU
-
LGW
14h 41m1 stop
£489Multiple Airlines
Wed, 25 Feb - Fri, 6 Mar
Multiple Airlines Logo
13:00 - 00:43
LGW
-
SJU
39h 43m2 stops
Multiple Airlines Logo
08:50 - 06:00
SJU
-
LGW
17h 10m1 stop
£489Multiple Airlines
Tue, 10 Feb - Tue, 17 Feb
JetBlue Logo
12:20 - 03:55
LHR
-
SJU
19h 35m1 stop
JetBlue Logo
23:50 - 21:40
SJU
-
LHR
17h 50m1 stop
£490JetBlue
Thu, 12 Feb - Wed, 18 Feb
JetBlue Logo
07:25 - 00:29
LHR
-
SJU
21h 04m1 stop
JetBlue Logo
05:55 - 20:45
SJU
-
LHR
34h 50m1 stop
£498JetBlue
Thu, 26 Feb - Sun, 8 Mar
Icelandair Logo
12:35 - 09:58
GLA
-
SJU
25h 23m2 stops
Icelandair Logo
11:15 - 09:55
SJU
-
GLA
18h 40m2 stops
£772Icelandair
Mon, 2 Feb - Fri, 6 Feb
Icelandair Logo
12:35 - 02:25
GLA
-
SJU
17h 50m2 stops
Icelandair Logo
08:15 - 09:55
SJU
-
GLA
21h 40m2 stops
£773Icelandair
Mon, 2 Feb - Fri, 6 Feb
Iberia Logo
07:50 - 16:35
LCY
-
SJU
12h 45m1 stop
Iberia Logo
21:25 - 14:05
SJU
-
LCY
12h 40m1 stop
£867Iberia
Wed, 28 Jan - Wed, 4 Feb
Iberia Logo
19:15 - 19:55
LCY
-
SJU
28h 40m1 stop
Iberia Logo
21:25 - 14:05
SJU
-
LCY
12h 40m1 stop
£875Iberia
Mon, 26 Jan - Thu, 5 Feb
British Airways Logo
06:30 - 23:59
NCL
-
SJU
21h 29m2 stops
British Airways Logo
14:28 - 11:25
SJU
-
NCL
16h 57m2 stops
£914British Airways
Thu, 5 Feb - Mon, 9 Feb
British Airways Logo
06:30 - 23:59
NCL
-
SJU
21h 29m2 stops
British Airways Logo
14:28 - 11:25
SJU
-
NCL
16h 57m2 stops
£915British Airways
Thu, 5 Feb - Mon, 9 Feb

Delta flights from United Kingdom to San Juan

Our best Delta deals on United Kingdom to San Juan flight tickets
Delta
9 Jan
LHR12:40London Heathrow
15h 17m
1 stop
SJU23:57San Juan Luis Munoz Marin Intl
19 Jan
SJU18:27San Juan Luis Munoz Marin Intl
13h 13m
1 stop
LHR11:40London Heathrow
£866
Find similar
Delta
9 Jan
LHR12:40London Heathrow
15h 17m
1 stop
SJU23:57San Juan Luis Munoz Marin Intl
18 Jan
SJU07:30San Juan Luis Munoz Marin Intl
21h 15m
2 stops
LHR08:45London Heathrow
£895
Find similar
Delta
9 Jan
LHR12:40London Heathrow
15h 17m
1 stop
SJU23:57San Juan Luis Munoz Marin Intl
18 Jan
SJU06:15San Juan Luis Munoz Marin Intl
21h 50m
2 stops
LHR08:05London Heathrow
£896
Find similar

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
26 Jan
LGW11:00London Gatwick
30h 20m
2 stops
SJU13:20San Juan Luis Munoz Marin Intl
5 Feb
SJU11:06San Juan Luis Munoz Marin Intl
24h 44m
2 stops
LGW15:50London Gatwick
£642
Find similar
TAP AIR PORTUGAL
26 Jan
LGW11:00London Gatwick
30h 20m
2 stops
SJU13:20San Juan Luis Munoz Marin Intl
5 Feb
SJU11:06San Juan Luis Munoz Marin Intl
24h 44m
2 stops
LGW15:50London Gatwick
£643
Find similar
TAP AIR PORTUGAL
26 Jan
LGW10:40London Gatwick
30h 40m
2 stops
SJU13:20San Juan Luis Munoz Marin Intl
5 Feb
SJU11:06San Juan Luis Munoz Marin Intl
24h 44m
2 stops
LGW15:50London Gatwick
£648
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 27 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

LGW - SJU

LGWSJU

London Gatwick

Wed 25/2

13:00-18:58

2 stops33h 58m

San Juan Luis Munoz Marin Intl

Fri 6/3

15:19-10:00

1 stop14h 41m

£489

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 10/2

13:00-00:43

2 stops39h 43m

San Juan Luis Munoz Marin Intl

Tue 17/2

08:50-06:00

1 stop17h 10m

£489

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 12/2

12:20-03:55

1 stop19h 35m

San Juan Luis Munoz Marin Intl

Wed 18/2

23:50-21:40

1 stop17h 50m

£490

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 26/2

07:25-00:29

1 stop21h 04m

San Juan Luis Munoz Marin Intl

Sun 8/3

05:55-20:45

1 stop34h 50m

£498

GlasgowSan Juan

GLA - SJU

GLASJU

Glasgow Intl

Mon 2/2

12:35-09:58

2 stops25h 23m

San Juan Luis Munoz Marin Intl

Fri 6/2

11:15-09:55

2 stops18h 40m

£772

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

08:15-09:55

2 stops21h 40m

£773

LondonSan Juan

LCY - SJU

LCYSJU

London City

Wed 28/1

07:50-16:35

1 stop12h 45m

San Juan Luis Munoz Marin Intl

Wed 4/2

21:25-14:05

1 stop12h 40m

£867

LondonSan Juan

LCY - SJU

LCYSJU

London City

Mon 26/1

19:15-19:55

1 stop28h 40m

San Juan Luis Munoz Marin Intl

Thu 5/2

21:25-14:05

1 stop12h 40m

£875

Newcastle upon TyneSan Juan

NCL - SJU

NCLSJU

Newcastle upon Tyne

Thu 5/2

06:30-23:59

2 stops21h 29m

San Juan Luis Munoz Marin Intl

Mon 9/2

14:28-11:25

2 stops16h 57m

£914

Newcastle upon TyneSan Juan

NCL - SJU

NCLSJU

Newcastle upon Tyne

Thu 5/2

06:30-23:59

2 stops21h 29m

San Juan Luis Munoz Marin Intl

Mon 9/2

14:28-11:25

2 stops16h 57m

£915

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 £526, 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 £559.

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 £527. 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 £642.

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 £582. 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 £832.

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 £643 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 £519 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 10m

Direct flights

None
The fastest flight from United Kingdom to San Juan takes 12h 10m
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 £342Free CancellationRating
7.5
677 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £435Free CancellationRating
7.2
2,902 reviews
Search JetBlue flights
FinnairPriceFrom £446Free CancellationRating
7.6
1,339 reviews
Search Finnair flights
IcelandairPriceFrom £482Free CancellationRating
7.0
592 reviews
Search Icelandair flights
IberiaPriceFrom £499Free CancellationRating
7.0
3,059 reviews
Search Iberia flights
British AirwaysPriceFrom £535Free CancellationRating
6.7
7,617 reviews
Search British Airways flights
Aer LingusPriceFrom £652Free CancellationRating
7.2
1,412 reviews
Search Aer Lingus flights
KLMPriceFrom £861Free 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