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Cheap flights from the United Kingdom to San Juan from £317

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 24/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
14:00 - 02:50LGW-SJU
16h 50m1 stop
Multiple Airlines Logo
04:10 - 10:00SJU-LGW
25h 50m2 stops
£536Multiple Airlines
Find Deal
Fri, 5 Dec - Thu, 11 Dec
Multiple Airlines Logo
14:00 - 02:50LGW-SJU
16h 50m1 stop
Multiple Airlines Logo
21:37 - 10:00SJU-LGW
32h 23m1 stop
£539Multiple Airlines
Find Deal
Fri, 9 Jan - Sun, 18 Jan
JetBlue Logo
09:20 - 01:22LHR-SJU
20h 02m1 stop
JetBlue Logo
14:00 - 06:55SJU-LHR
12h 55m1 stop
£542JetBlue
Find Deal
Sat, 17 Jan - Thu, 22 Jan
JetBlue Logo
08:05 - 19:50LHR-SJU
15h 45m1 stop
JetBlue Logo
00:59 - 20:45SJU-LHR
15h 46m1 stop
£542JetBlue
Find Deal
Sat, 7 Mar - Fri, 20 Mar
Icelandair Logo
09:20 - 03:50LHR-SJU
22h 30m2 stops
Icelandair Logo
05:15 - 06:55SJU-LHR
21h 40m1 stop
£554Icelandair
Find Deal
Sat, 7 Mar - Sat, 21 Mar
Icelandair Logo
12:20 - 02:28LHR-SJU
18h 08m1 stop
Icelandair Logo
05:15 - 21:40SJU-LHR
12h 25m1 stop
£565Icelandair
Find Deal
Thu, 12 Feb - Wed, 18 Feb
British Airways Logo
09:10 - 19:55LCY-SJU
14h 45m1 stop
British Airways Logo
21:25 - 14:05SJU-LCY
12h 40m1 stop
£934British Airways
Find Deal
Mon, 26 Jan - Thu, 5 Feb
British Airways Logo
09:10 - 19:55LCY-SJU
14h 45m1 stop
British Airways Logo
21:25 - 14:05SJU-LCY
12h 40m1 stop
£939British Airways
Find Deal
Mon, 26 Jan - Thu, 5 Feb
Iberia Logo
07:50 - 19:55LCY-SJU
16h 05m1 stop
Iberia Logo
21:25 - 14:05SJU-LCY
12h 40m1 stop
£942Iberia
Find Deal
Thu, 11 Dec - Wed, 17 Dec
Iberia Logo
09:10 - 19:55LCY-SJU
14h 45m1 stop
Iberia Logo
11:38 - 08:50SJU-LCY
17h 12m2 stops
£966Iberia
Find Deal
Mon, 26 Jan - Thu, 5 Feb

Avianca flights from United Kingdom to San Juan

Our best Avianca deals on United Kingdom to San Juan flight tickets
Avianca
23 Feb
LHR21:40London Heathrow
23h 25m
1 stop
SJU17:05San Juan Luis Munoz Marin Intl
7 Mar
SJU13:00San Juan Luis Munoz Marin Intl
21h 35m
1 stop
LHR14:35London Heathrow
£548
Find similar
Avianca
8 Apr
LHR22:05London Heathrow
23h 45m
1 stop
SJU16:50San Juan Luis Munoz Marin Intl
18 Apr
SJU13:15San Juan Luis Munoz Marin Intl
21h 20m
1 stop
LHR15:35London Heathrow
£561
Find similar
Avianca
2 Mar
LHR21:40London Heathrow
17h 55m
1 stop
SJU11:35San Juan Luis Munoz Marin Intl
3 Mar
SJU18:30San Juan Luis Munoz Marin Intl
16h 05m
1 stop
LHR14:35London Heathrow
£574
Find similar

Aer Lingus flights from United Kingdom to San Juan

Our best Aer Lingus deals on United Kingdom to San Juan flight tickets
Aer Lingus
28 Feb
MAN08:05Manchester
19h 39m
2 stops
SJU23:44San Juan Luis Munoz Marin Intl
9 Mar
SJU22:59San Juan Luis Munoz Marin Intl
27h 51m
1 stop
MAN06:50Manchester
£673
Find similar
Aer Lingus
28 Feb
MAN08:05Manchester
19h 39m
2 stops
SJU23:44San Juan Luis Munoz Marin Intl
9 Mar
SJU22:59San Juan Luis Munoz Marin Intl
27h 51m
1 stop
MAN06:50Manchester
£677
Find similar
Aer Lingus
28 Feb
MAN14:15Manchester
33h 34m
1 stop
SJU19:49San Juan Luis Munoz Marin Intl
9 Mar
SJU04:15San Juan Luis Munoz Marin Intl
22h 35m
1 stop
MAN06:50Manchester
£681
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 5 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

LGW - SJU

LGWSJU

London Gatwick

Fri 5/12

14:00-02:50

1 stop16h 50m

San Juan Luis Munoz Marin Intl

Thu 11/12

04:10-10:00

2 stops25h 50m

£536

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Fri 9/1

14:00-02:50

1 stop16h 50m

San Juan Luis Munoz Marin Intl

Sun 18/1

21:37-10:00

1 stop32h 23m

£539

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 17/1

09:20-01:22

1 stop20h 02m

San Juan Luis Munoz Marin Intl

Thu 22/1

14:00-06:55

1 stop12h 55m

£542

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 7/3

08:05-19:50

1 stop15h 45m

San Juan Luis Munoz Marin Intl

Fri 20/3

00:59-20:45

1 stop15h 46m

£542

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 7/3

09:20-03:50

2 stops22h 30m

San Juan Luis Munoz Marin Intl

Sat 21/3

05:15-06:55

1 stop21h 40m

£554

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 12/2

12:20-02:28

1 stop18h 08m

San Juan Luis Munoz Marin Intl

Wed 18/2

05:15-21:40

1 stop12h 25m

£565

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

21:25-14:05

1 stop12h 40m

£934

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

21:25-14:05

1 stop12h 40m

£939

LondonSan Juan

LCY - SJU

LCYSJU

London City

Thu 11/12

07:50-19:55

1 stop16h 05m

San Juan Luis Munoz Marin Intl

Wed 17/12

21:25-14:05

1 stop12h 40m

£942

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

11:38-08:50

2 stops17h 12m

£966

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 £547, 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 £565.

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 £546. 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 £665.

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 £603. 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 £862.

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 £659 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 £538 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 £342Free CancellationRating
7.5
672 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £451Free CancellationRating
7.2
2,907 reviews
Search JetBlue flights
FinnairPriceFrom £463Free CancellationRating
7.6
1,335 reviews
Search Finnair flights
IcelandairPriceFrom £488Free CancellationRating
7.1
571 reviews
Search Icelandair flights
IberiaPriceFrom £520Free CancellationRating
7.0
3,007 reviews
Search Iberia flights
British AirwaysPriceFrom £555Free CancellationRating
6.7
7,496 reviews
Search British Airways flights
Aer LingusPriceFrom £676Free CancellationRating
7.2
1,365 reviews
Search Aer Lingus flights
KLMPriceFrom £893Free CancellationRating
7.7
1,405 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