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Cheap flights from London to San Juan from £184

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to San Juan departing on 30/8. 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 London to San Juan

Cheap return flights

Icelandair Logo
08:15 - 22:32LHR-SJU
19h 17m1 stop
Icelandair Logo
06:00 - 20:45SJU-LHR
33h 45m1 stop
£493Icelandair
Find Deal
Tue, 9 Sep - Wed, 24 Sep
Icelandair Logo
12:10 - 12:42LGW-SJU
29h 32m2 stops
Icelandair Logo
13:00 - 09:35SJU-LGW
15h 35m1 stop
£493Icelandair
Find Deal
Thu, 25 Sep - Fri, 3 Oct
Logo
21:20 - 09:56LGW-SJU
41h 36m2 stops
Logo
06:22 - 06:20SJU-LGW
18h 58m1 stop
£495
Find Deal
Thu, 2 Oct - Sat, 18 Oct
JetBlue Logo
08:15 - 16:43LHR-SJU
13h 28m1 stop
JetBlue Logo
14:05 - 09:30SJU-LHR
14h 25m1 stop
£497JetBlue
Find Deal
Fri, 19 Sep - Tue, 7 Oct
JetBlue Logo
08:15 - 21:24LHR-SJU
18h 09m1 stop
JetBlue Logo
13:00 - 06:30SJU-LHR
12h 30m1 stop
£506JetBlue
Find Deal
Wed, 3 Sep - Thu, 18 Sep
Iberia Logo
07:50 - 16:40LCY-SJU
12h 50m1 stop
Iberia Logo
18:10 - 14:35SJU-LCY
16h 25m1 stop
£971Iberia
Find Deal
Thu, 5 Feb - Sun, 15 Feb
Iberia Logo
19:15 - 19:55LCY-SJU
28h 40m1 stop
Iberia Logo
18:10 - 14:35SJU-LCY
16h 25m1 stop
£980Iberia
Find Deal
Sun, 1 Feb - Sun, 15 Feb
Virgin Atlantic Logo
10:00 - 02:08LCY-SJU
20h 08m2 stops
Virgin Atlantic Logo
13:22 - 13:15SJU-LCY
19h 53m2 stops
£1,947Virgin Atlantic
Find Deal
Sat, 27 Dec - Sat, 10 Jan
British Airways Logo
15:00 - 23:40LCY-SJU
36h 40m2 stops
British Airways Logo
20:51 - 12:40SJU-LCY
35h 49m2 stops
£3,537British Airways
Find Deal
Fri, 19 Dec - Sun, 28 Dec
British Airways Logo
19:25 - 23:40LCY-SJU
32h 15m2 stops
British Airways Logo
20:51 - 12:40SJU-LCY
35h 49m2 stops
£3,637British Airways
Find Deal
Fri, 19 Dec - Sat, 27 Dec

JetBlue flights from London to San Juan

Our best JetBlue deals on London to San Juan flight tickets
JetBlue
19 Sept
LHR08:15London Heathrow
13h 28m
1 stop
SJU16:43San Juan Luis Munoz Marin Intl
7 Oct
SJU14:05San Juan Luis Munoz Marin Intl
14h 25m
1 stop
LHR09:30London Heathrow
£497
Find similar
JetBlue
3 Sept
LHR08:15London Heathrow
18h 09m
1 stop
SJU21:24San Juan Luis Munoz Marin Intl
18 Sept
SJU13:00San Juan Luis Munoz Marin Intl
12h 30m
1 stop
LHR06:30London Heathrow
£506
Find similar
JetBlue
6 Nov
LHR12:20London Heathrow
19h 28m
1 stop
SJU03:48San Juan Luis Munoz Marin Intl
15 Nov
SJU08:05San Juan Luis Munoz Marin Intl
21h 25m
1 stop
LHR09:30London Heathrow
£511
Find similar

Icelandair flights from London to San Juan

Our best Icelandair deals on London to San Juan flight tickets
Icelandair
9 Sept
LHR08:15London Heathrow
19h 17m
1 stop
SJU22:32San Juan Luis Munoz Marin Intl
24 Sept
SJU06:00San Juan Luis Munoz Marin Intl
33h 45m
1 stop
LHR20:45London Heathrow
£493
Find similar
Icelandair
25 Sept
LGW12:10London Gatwick
29h 32m
2 stops
SJU12:42San Juan Luis Munoz Marin Intl
3 Oct
SJU13:00San Juan Luis Munoz Marin Intl
15h 35m
1 stop
LGW09:35London Gatwick
£493
Find similar
Icelandair
9 Sept
LHR08:15London Heathrow
19h 17m
1 stop
SJU22:32San Juan Luis Munoz Marin Intl
24 Sept
SJU18:05San Juan Luis Munoz Marin Intl
21h 40m
1 stop
LHR20:45London Heathrow
£495
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London 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 18 August 2025.
Use the filters below to find and compare flights from London to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 9/9

08:15-22:32

1 stop19h 17m

San Juan Luis Munoz Marin Intl

Wed 24/9

06:00-20:45

1 stop33h 45m

£493

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Thu 25/9

12:10-12:42

2 stops29h 32m

San Juan Luis Munoz Marin Intl

Fri 3/10

13:00-09:35

1 stop15h 35m

£493

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Thu 2/10

21:20-09:56

2 stops41h 36m

San Juan Luis Munoz Marin Intl

Sat 18/10

06:22-06:20

1 stop18h 58m

£495

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 19/9

08:15-16:43

1 stop13h 28m

San Juan Luis Munoz Marin Intl

Tue 7/10

14:05-09:30

1 stop14h 25m

£497

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 3/9

08:15-21:24

1 stop18h 09m

San Juan Luis Munoz Marin Intl

Thu 18/9

13:00-06:30

1 stop12h 30m

£506

LondonSan Juan

LCY - SJU

LCYSJU

London City

Thu 5/2

07:50-16:40

1 stop12h 50m

San Juan Luis Munoz Marin Intl

Sun 15/2

18:10-14:35

1 stop16h 25m

£971

LondonSan Juan

LCY - SJU

LCYSJU

London City

Sun 1/2

19:15-19:55

1 stop28h 40m

San Juan Luis Munoz Marin Intl

Sun 15/2

18:10-14:35

1 stop16h 25m

£980

LondonSan Juan

LCY - SJU

LCYSJU

London City

Sat 27/12

10:00-02:08

2 stops20h 08m

San Juan Luis Munoz Marin Intl

Sat 10/1

13:22-13:15

2 stops19h 53m

£1,947

LondonSan Juan

LCY - SJU

LCYSJU

London City

Fri 19/12

15:00-23:40

2 stops36h 40m

San Juan Luis Munoz Marin Intl

Sun 28/12

20:51-12:40

2 stops35h 49m

£3,537

LondonSan Juan

LCY - SJU

LCYSJU

London City

Fri 19/12

19:25-23:40

2 stops32h 15m

San Juan Luis Munoz Marin Intl

Sat 27/12

20:51-12:40

2 stops35h 49m

£3,637

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 London 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 London is in September. Flight prices, which tend to average around £535, 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 London during November instead. Flights to San Juan in November, while not as cheap as those in September, still average around £549.

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 £525. 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 £639.

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 London to San Juan when you can find flight prices for as low as £580. 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 £829.

How far in advance should I book a flight to San Juan?

You are more likely to see cheaper flights to San Juan from London 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 London for as low as £504 on momondo.

Cheap London to San Juan flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to San Juan

Best price found

£184

Fastest flight time

12h 10m

Direct flights

None

Airports in San Juan

1 airport
The best one-way flight to San Juan from London in the past 72 hours is £184. The best return flight deal from London to San Juan found on momondo in the last 72 hours is £493.
The fastest flight from London to San Juan takes 12h 10m
There are no direct flights from London to San Juan. Popular non-direct routes for this connection are London Gatwick Airport - San Juan Luis Munoz Marin Intl Airport, London Stansted Airport - San Juan Luis Munoz Marin Intl Airport and London Heathrow Airport - San Juan Luis Munoz Marin Intl Airport.
There is 1 airport near San Juan: San Juan Luis Munoz Marin Intl (SJU)
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  • How far is London to San Juan by plane?

    A flight from London to San Juan will travel around 4196.4 mi. Flights usually cover this in 12h 45m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from London to San Juan?

    Prices for flights from London to San Juan are refreshed on a daily basis.

  • How many operators does momondo search for flights from London to San Juan?

  • How old do you have to be to fly from London 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 London 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 London to San Juan

Compare and see reviews for airlines that fly from London to San Juan with momondo
Airline
Rating
Free Cancellation
Price
Virgin AtlanticPriceFrom £340Free CancellationRating
7.4
657 reviews
Search Virgin Atlantic flights
IcelandairPriceFrom £420Free CancellationRating
7.0
527 reviews
Search Icelandair flights
JetBluePriceFrom £450Free CancellationRating
7.2
2,915 reviews
Search JetBlue flights
FinnairPriceFrom £450Free CancellationRating
7.6
1,320 reviews
Search Finnair flights
IberiaPriceFrom £506Free CancellationRating
7.0
2,884 reviews
Search Iberia flights
British AirwaysPriceFrom £551Free CancellationRating
6.6
7,277 reviews
Search British Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from London to San Juan?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Juan from London.

Can I find flights from London to San Juan with flexible booking policies on momondo?

Yes. All flights to San Juan from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from London to San Juan?

Once all potential London to San Juan flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from London to San Juan right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to San Juan from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices 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