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Cheap flights from London to San Juan from £325

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 29/10. 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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Cheap return flights

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Icelandair Logo
09:20 - 12:44LHR-SJU
31h 24m1 stop
Icelandair Logo
10:00 - 06:55SJU-LHR
16h 55m2 stops
£489Icelandair
Find Deal
Thu, 13 Nov - Thu, 11 Dec
JetBlue Logo
09:20 - 01:22LHR-SJU
20h 02m1 stop
JetBlue Logo
06:15 - 06:55SJU-LHR
20h 40m1 stop
£490JetBlue
Find Deal
Thu, 29 Jan - Sat, 7 Feb
Icelandair Logo
09:20 - 01:22LHR-SJU
20h 02m1 stop
Icelandair Logo
06:00 - 09:30SJU-LHR
23h 30m2 stops
£490Icelandair
Find Deal
Thu, 29 Jan - Sat, 7 Feb
JetBlue Logo
07:25 - 18:53LHR-SJU
15h 28m1 stop
JetBlue Logo
13:41 - 06:55SJU-LHR
13h 14m1 stop
£510JetBlue
Find Deal
Wed, 3 Dec - Wed, 10 Dec
TAP AIR PORTUGAL Logo
11:00 - 13:48LGW-SJU
30h 48m2 stops
TAP AIR PORTUGAL Logo
06:15 - 09:50SJU-LGW
23h 35m2 stops
£595TAP AIR PORTUGAL
Find Deal
Mon, 26 Jan - Thu, 5 Feb
TAP AIR PORTUGAL Logo
11:00 - 13:48LGW-SJU
30h 48m2 stops
TAP AIR PORTUGAL Logo
06:15 - 09:50SJU-LGW
23h 35m2 stops
£596TAP AIR PORTUGAL
Find Deal
Mon, 26 Jan - Thu, 5 Feb
Iberia Logo
09:10 - 19:55LCY-SJU
14h 45m1 stop
Iberia Logo
21:25 - 14:05SJU-LCY
12h 40m1 stop
£943Iberia
Find Deal
Mon, 26 Jan - Thu, 5 Feb
Iberia Logo
07:50 - 16:40LCY-SJU
12h 50m1 stop
Iberia Logo
21:25 - 14:35SJU-LCY
13h 10m1 stop
£953Iberia
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Thu, 19 Feb - Sun, 22 Feb
British Airways Logo
09:10 - 19:55LCY-SJU
14h 45m1 stop
British Airways Logo
15:45 - 08:50SJU-LCY
37h 05m2 stops
£1,096British Airways
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Tue, 10 Mar - Thu, 12 Mar
British Airways Logo
07:50 - 19:55LCY-SJU
16h 05m1 stop
British Airways Logo
17:06 - 12:40SJU-LCY
15h 34m2 stops
£1,167British Airways
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Wed, 31 Dec - Sun, 11 Jan

TAP AIR PORTUGAL flights from London to San Juan Luis Munoz Marin Intl Airport

Our best TAP AIR PORTUGAL deals on London to San Juan Luis Munoz Marin Intl Airport flight tickets
TAP AIR PORTUGAL
26 Jan
LGW11:00London Gatwick
30h 48m
2 stops
SJU13:48San Juan Luis Munoz Marin Intl
5 Feb
SJU06:15San Juan Luis Munoz Marin Intl
23h 35m
2 stops
LGW09:50London Gatwick
£595
Find similar
TAP AIR PORTUGAL
26 Jan
LGW11:00London Gatwick
30h 48m
2 stops
SJU13:48San Juan Luis Munoz Marin Intl
5 Feb
SJU06:15San Juan Luis Munoz Marin Intl
23h 35m
2 stops
LGW09:50London Gatwick
£596
Find similar
TAP AIR PORTUGAL
1 Mar
LGW21:25London Gatwick
43h 35m
2 stops
SJU13:00San Juan Luis Munoz Marin Intl
15 Mar
SJU05:15San Juan Luis Munoz Marin Intl
30h 30m
2 stops
LGW15:45London Gatwick
£602
Find similar

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

Our best Icelandair deals on London to San Juan Luis Munoz Marin Intl Airport flight tickets
Icelandair
13 Nov
LHR09:20London Heathrow
31h 24m
1 stop
SJU12:44San Juan Luis Munoz Marin Intl
11 Dec
SJU10:00San Juan Luis Munoz Marin Intl
16h 55m
2 stops
LHR06:55London Heathrow
£489
Find similar
Icelandair
29 Jan
LHR09:20London Heathrow
20h 02m
1 stop
SJU01:22San Juan Luis Munoz Marin Intl
7 Feb
SJU06:00San Juan Luis Munoz Marin Intl
23h 30m
2 stops
LHR09:30London Heathrow
£490
Find similar
Icelandair
4 Nov
LHR09:20London Heathrow
31h 24m
1 stop
SJU12:44San Juan Luis Munoz Marin Intl
8 Nov
SJU10:43San Juan Luis Munoz Marin Intl
18h 47m
2 stops
LHR09:30London Heathrow
£491
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 24 October 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

Thu 13/11

09:20-12:44

1 stop31h 24m

San Juan Luis Munoz Marin Intl

Thu 11/12

10:00-06:55

2 stops16h 55m

£489

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 29/1

09:20-01:22

1 stop20h 02m

San Juan Luis Munoz Marin Intl

Sat 7/2

06:15-06:55

1 stop20h 40m

£490

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 29/1

09:20-01:22

1 stop20h 02m

San Juan Luis Munoz Marin Intl

Sat 7/2

06:00-09:30

2 stops23h 30m

£490

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 3/12

07:25-18:53

1 stop15h 28m

San Juan Luis Munoz Marin Intl

Wed 10/12

13:41-06:55

1 stop13h 14m

£510

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Mon 26/1

11:00-13:48

2 stops30h 48m

San Juan Luis Munoz Marin Intl

Thu 5/2

06:15-09:50

2 stops23h 35m

£595

LondonSan Juan

LGW - SJU

LGWSJU

London Gatwick

Mon 26/1

11:00-13:48

2 stops30h 48m

San Juan Luis Munoz Marin Intl

Thu 5/2

06:15-09:50

2 stops23h 35m

£596

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

£943

LondonSan Juan

LCY - SJU

LCYSJU

London City

Thu 19/2

07:50-16:40

1 stop12h 50m

San Juan Luis Munoz Marin Intl

Sun 22/2

21:25-14:35

1 stop13h 10m

£953

LondonSan Juan

LCY - SJU

LCYSJU

London City

Tue 10/3

09:10-19:55

1 stop14h 45m

San Juan Luis Munoz Marin Intl

Thu 12/3

15:45-08:50

2 stops37h 05m

£1,096

LondonSan Juan

LCY - SJU

LCYSJU

London City

Wed 31/12

07:50-19:55

1 stop16h 05m

San Juan Luis Munoz Marin Intl

Sun 11/1

17:06-12:40

2 stops15h 34m

£1,167

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 January instead. Flights to San Juan Luis Munoz Marin Intl Airport in January, 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 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 £533. 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 £650.

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 £590. 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 £843 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 £644 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 £526 on momondo.

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

As of October 2025, prices for London to San Juan Luis Munoz Marin Intl Airport flights are approximately 30% cheaper 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

Direct flights

None
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.
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  • 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 45m.

  • 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 £335Free CancellationRating
7.5
670 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £442Free CancellationRating
7.2
2,908 reviews
Search JetBlue flights
FinnairPriceFrom £452Free CancellationRating
7.6
1,333 reviews
Search Finnair flights
IcelandairPriceFrom £466Free CancellationRating
7.1
561 reviews
Search Icelandair flights
IberiaPriceFrom £512Free CancellationRating
7.0
2,997 reviews
Search Iberia flights
British AirwaysPriceFrom £542Free CancellationRating
6.7
7,468 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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