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Cheap flights from London 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 London to San Juan departing on 1/3. 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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Cheap return flights

Enter your travel dates to find the best prices.
JetBlue Logo
09:20 - 22:55
LHR
-
SJU
17h 35m1 stop
JetBlue Logo
11:06 - 09:30
SJU
-
LHR
18h 24m1 stop
£526JetBlue
Tue, 13 Jan - Mon, 26 Jan
Multiple Airlines Logo
14:00 - 00:43
LGW
-
SJU
14h 43m1 stop
Multiple Airlines Logo
15:30 - 17:50
SJU
-
LGW
22h 20m2 stops
£528Multiple Airlines
Mon, 23 Feb - Sun, 1 Mar
Multiple Airlines Logo
13:00 - 11:37
LGW
-
SJU
26h 37m2 stops
Multiple Airlines Logo
08:50 - 06:00
SJU
-
LGW
17h 10m1 stop
£529Multiple Airlines
Tue, 24 Feb - Fri, 27 Feb
Multiple Airlines Logo
14:00 - 09:47
LGW
-
SJU
23h 47m1 stop
Multiple Airlines Logo
08:00 - 10:00
SJU
-
LGW
22h 00m1 stop
£529Multiple Airlines
Fri, 16 Jan - Thu, 22 Jan
JetBlue Logo
09:20 - 22:55
LHR
-
SJU
17h 35m1 stop
JetBlue Logo
10:25 - 09:30
SJU
-
LHR
19h 05m1 stop
£531JetBlue
Tue, 13 Jan - Sat, 24 Jan
Multiple Airlines Logo
14:00 - 09:47
LGW
-
SJU
23h 47m1 stop
Multiple Airlines Logo
08:00 - 10:00
SJU
-
LGW
22h 00m1 stop
£538Multiple Airlines
Sat, 17 Jan - Mon, 26 Jan
Multiple Airlines Logo
13:00 - 00:48
LGW
-
SJU
39h 48m2 stops
Multiple Airlines Logo
16:40 - 06:00
SJU
-
LGW
33h 20m1 stop
£539Multiple Airlines
Wed, 11 Mar - Fri, 20 Mar
British Airways Logo
06:50 - 23:44
LCY
-
SJU
20h 54m2 stops
British Airways Logo
21:25 - 14:05
SJU
-
LCY
12h 40m1 stop
£849British Airways
Fri, 27 Feb - Tue, 3 Mar
Iberia Logo
19:15 - 19:55
LCY
-
SJU
28h 40m1 stop
Iberia Logo
21:25 - 08:50
SJU
-
LCY
31h 25m1 stop
£858Iberia
Mon, 26 Jan - Thu, 5 Feb
Iberia Logo
19:15 - 19:55
LCY
-
SJU
28h 40m1 stop
Iberia Logo
21:25 - 08:50
SJU
-
LCY
31h 25m1 stop
£860Iberia
Mon, 26 Jan - Thu, 5 Feb

Avianca flights from London to San Juan Luis Munoz Marin Intl Airport

Our best Avianca deals on London to San Juan Luis Munoz Marin Intl Airport flight tickets
Avianca
27 Jan
LHR21:40London Heathrow
23h 25m
1 stop
SJU17:05San Juan Luis Munoz Marin Intl
8 Feb
SJU18:30San Juan Luis Munoz Marin Intl
16h 05m
1 stop
LHR14:35London Heathrow
£574
Find similar
Avianca
29 Jan
LHR21:40London Heathrow
23h 25m
1 stop
SJU17:05San Juan Luis Munoz Marin Intl
3 Feb
SJU13:00San Juan Luis Munoz Marin Intl
21h 35m
1 stop
LHR14:35London Heathrow
£624
Find similar

British Airways flights from London to San Juan Luis Munoz Marin Intl Airport

Our best British Airways deals on London to San Juan Luis Munoz Marin Intl Airport flight tickets
British Airways
27 Feb
LCY06:50London City
20h 54m
2 stops
SJU23:44San Juan Luis Munoz Marin Intl
3 Mar
SJU21:25San Juan Luis Munoz Marin Intl
12h 40m
1 stop
LCY14:05London City
£849
Find similar
British Airways
4 Feb
LCY07:50London City
16h 05m
1 stop
SJU19:55San Juan Luis Munoz Marin Intl
25 Feb
SJU21:25San Juan Luis Munoz Marin Intl
12h 40m
1 stop
LCY14:05London City
£877
Find similar
British Airways
27 Feb
LCY06:50London City
20h 54m
2 stops
SJU23:44San Juan Luis Munoz Marin Intl
3 Mar
SJU14:38San Juan Luis Munoz Marin Intl
26h 52m
2 stops
LCY21:30London City
£894
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London to San Juan Luis Munoz Marin Intl Airport 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 December 2025.
Use the filters below to find and compare flights from London to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 13/1

09:20-22:55

1 stop17h 35m

San Juan Luis Munoz Marin Intl

Mon 26/1

11:06-09:30

1 stop18h 24m

£526

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Mon 23/2

14:00-00:43

1 stop14h 43m

San Juan Luis Munoz Marin Intl

Sun 1/3

15:30-17:50

2 stops22h 20m

£528

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Tue 24/2

13:00-11:37

2 stops26h 37m

San Juan Luis Munoz Marin Intl

Fri 27/2

08:50-06:00

1 stop17h 10m

£529

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Fri 16/1

14:00-09:47

1 stop23h 47m

San Juan Luis Munoz Marin Intl

Thu 22/1

08:00-10:00

1 stop22h 00m

£529

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 13/1

09:20-22:55

1 stop17h 35m

San Juan Luis Munoz Marin Intl

Sat 24/1

10:25-09:30

1 stop19h 05m

£531

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Sat 17/1

14:00-09:47

1 stop23h 47m

San Juan Luis Munoz Marin Intl

Mon 26/1

08:00-10:00

1 stop22h 00m

£538

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Wed 11/3

13:00-00:48

2 stops39h 48m

San Juan Luis Munoz Marin Intl

Fri 20/3

16:40-06:00

1 stop33h 20m

£539

LondonSan Juan

LCY - SJU

LCYSJU

London City

Fri 27/2

06:50-23:44

2 stops20h 54m

San Juan Luis Munoz Marin Intl

Tue 3/3

21:25-14:05

1 stop12h 40m

£849

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

21:25-08:50

1 stop31h 25m

£858

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

21:25-08:50

1 stop31h 25m

£860

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from London to San Juan Luis Munoz Marin Intl Airport

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 typical price of a round-trip flight between London and San Juan Luis Munoz Marin Intl Airport?

What is the cheapest month to fly to San Juan Luis Munoz Marin Intl Airport?

If you aren’t able to travel during the month of September, then book flights to San Juan Luis Munoz Marin Intl Airport from London during February instead. Flights to San Juan Luis Munoz Marin Intl Airport in February, 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 Luis Munoz Marin Intl Airport?

The cheapest day to depart from London to San Juan Luis Munoz Marin Intl Airport is on a Monday when prices can be found for as low as £532. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from London to San Juan Luis Munoz Marin Intl Airport for around £648.

What is the cheapest time of day to depart on your flight to San Juan Luis Munoz Marin Intl Airport?

In the morning is the cheapest time of day to fly from London to San Juan Luis Munoz Marin Intl Airport when you can find flight prices for as low as £588. Flying to San Juan Luis Munoz Marin Intl Airport in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £840 on average. Flights to San Juan Luis Munoz Marin Intl Airport from London in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight to San Juan Luis Munoz Marin Intl Airport?

You are more likely to see cheaper flights to San Juan Luis Munoz Marin Intl Airport from London when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan Luis Munoz Marin Intl Airport for around £650 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 Luis Munoz Marin Intl Airport from London for as low as £524 on momondo.

How have London to San Juan Luis Munoz Marin Intl Airport flight prices changed over time?

As of December 2025, prices for London to San Juan Luis Munoz Marin Intl Airport flights are approximately 35% more expensive when compared to flights at the same time last year.

When to book flights from London to San Juan Luis Munoz Marin Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from London to San Juan Luis Munoz Marin Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London to San Juan Luis Munoz Marin Intl Airport (LON to SJU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to San Juan Luis Munoz Marin Intl Airport

Fastest flight time

12h 50m

Direct flights

None
The fastest flight from London to San Juan Luis Munoz Marin Intl Airport takes 12h 50m
There are no direct flights from London to San Juan Luis Munoz Marin Intl Airport. There are no popular flight routes from London to San Juan Luis Munoz Marin Intl Airport.
Search flight deals

  • How far is London to San Juan Luis Munoz Marin Intl by plane?

    The straight-line distance from London to San Juan Luis Munoz Marin Intl is 4193.3 mi. By plane, this route typically takes 12h 50m.

  • When did momondo last update prices for flights from London to San Juan Luis Munoz Marin Intl Airport?

    Prices for flights from London to San Juan Luis Munoz Marin Intl Airport are updated daily.

  • How many operators does momondo search for flights from London to San Juan Luis Munoz Marin Intl Airport?

  • How old do you have to be to fly from London to San Juan Luis Munoz Marin Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London to San Juan Luis Munoz Marin Intl Airport.

  • What documentation or ID do you need to fly to San Juan Luis Munoz Marin Intl Airport?

    The travel and health documents you'll need for your trip to San Juan Luis Munoz Marin Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Juan Luis Munoz Marin Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from London to San Juan Luis Munoz Marin Intl Airport?

Best airlines flying from London to San Juan Luis Munoz Marin Intl Airport

Compare and see reviews for airlines that fly from London to San Juan Luis Munoz Marin Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Virgin AtlanticPriceFrom £334Free CancellationRating
7.5
675 reviews
Search Virgin Atlantic flights
FinnairPriceFrom £451Free CancellationRating
7.6
1,338 reviews
Search Finnair flights
JetBluePriceFrom £458Free CancellationRating
7.2
2,897 reviews
Search JetBlue flights
IcelandairPriceFrom £487Free CancellationRating
7.0
591 reviews
Search Icelandair flights
IberiaPriceFrom £502Free CancellationRating
7.0
3,053 reviews
Search Iberia flights
British AirwaysPriceFrom £541Free CancellationRating
6.7
7,585 reviews
Search British Airways flights

Travelling to a place near San Juan?

Book flights to San Juan if you plan to visit one of these locations
Rio Grande
Carolina
Fajardo
Dorado

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to San Juan for you.

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

Yes. momondo allows you to filter the results for London to San Juan flights to just show those with flexible booking policies.

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

Once you have performed a search for London to San Juan flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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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