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Cheap flights from London Heathrow Airport to San Juan from £323

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 Heathrow Airport to San Juan departing on 25/2. 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

Enter your travel dates to find the best prices.
JetBlue Logo
07:25 - 21:54LHR-SJU
18h 29m1 stop
JetBlue Logo
14:33 - 06:55SJU-LHR
12h 22m1 stop
£530JetBlue
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qua, 12 nov - ter, 18 nov
JetBlue Logo
12:20 - 03:48LHR-SJU
19h 28m1 stop
JetBlue Logo
08:02 - 20:45SJU-LHR
32h 43m1 stop
£533JetBlue
Find Deal
sex, 21 nov - dom, 7 dez
Avianca Logo
21:40 - 17:05LHR-SJU
23h 25m1 stop
Avianca Logo
18:30 - 14:35SJU-LHR
16h 05m1 stop
£547Avianca
Find Deal
qua, 11 mar - qua, 25 mar
Icelandair Logo
08:05 - 23:59LHR-SJU
19h 54m2 stops
Icelandair Logo
08:10 - 09:30SJU-LHR
21h 20m2 stops
£555Icelandair
Find Deal
seg, 10 nov - ter, 18 nov
Icelandair Logo
08:05 - 23:48LHR-SJU
19h 43m1 stop
Icelandair Logo
05:10 - 22:00SJU-LHR
12h 50m1 stop
£557Icelandair
Find Deal
sex, 21 nov - sáb, 6 dez
Avianca Logo
21:40 - 11:35LHR-SJU
17h 55m1 stop
Avianca Logo
18:30 - 14:35SJU-LHR
16h 05m1 stop
£574Avianca
Find Deal
seg, 2 mar - ter, 3 mar
Multiple Airlines Logo
06:40 - 09:52LHR-SJU
31h 12m3 stops
Multiple Airlines Logo
06:00 - 16:25SJU-LHR
30h 25m3 stops
£634Multiple Airlines
Find Deal
qua, 21 jan - sáb, 24 jan
Multiple Airlines Logo
13:45 - 19:21LHR-SJU
33h 36m3 stops
Multiple Airlines Logo
17:27 - 07:10SJU-LHR
33h 43m2 stops
£644Multiple Airlines
Find Deal
qua, 21 jan - sáb, 24 jan
TAP AIR PORTUGAL Logo
06:00 - 10:16LHR-SJU
32h 16m2 stops
TAP AIR PORTUGAL Logo
11:15 - 17:30SJU-LHR
26h 15m2 stops
£657TAP AIR PORTUGAL
Find Deal
seg, 26 jan - ter, 10 fev
TAP AIR PORTUGAL Logo
12:25 - 03:17LHR-SJU
18h 52m2 stops
TAP AIR PORTUGAL Logo
12:38 - 15:30SJU-LHR
22h 52m2 stops
£666TAP AIR PORTUGAL
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sex, 21 nov - sáb, 6 dez

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

Our best TAP AIR PORTUGAL deals on London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flight tickets
TAP AIR PORTUGAL
26 Jan
LHR06:00London Heathrow
32h 16m
2 stops
SJU10:16San Juan Luis Munoz Marin Intl
10 Feb
SJU11:15San Juan Luis Munoz Marin Intl
26h 15m
2 stops
LHR17:30London Heathrow
£657
Find similar
TAP AIR PORTUGAL
21 Nov
LHR12:25London Heathrow
18h 52m
2 stops
SJU03:17San Juan Luis Munoz Marin Intl
6 Dec
SJU12:38San Juan Luis Munoz Marin Intl
22h 52m
2 stops
LHR15:30London Heathrow
£666
Find similar
TAP AIR PORTUGAL
21 Nov
LHR12:25London Heathrow
18h 52m
2 stops
SJU03:17San Juan Luis Munoz Marin Intl
6 Dec
SJU06:45San Juan Luis Munoz Marin Intl
24h 40m
2 stops
LHR11:25London Heathrow
£678
Find similar

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

Our best Avianca deals on London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flight tickets
Avianca
11 Mar
LHR21:40London Heathrow
23h 25m
1 stop
SJU17:05San Juan Luis Munoz Marin Intl
25 Mar
SJU18:30San Juan Luis Munoz Marin Intl
16h 05m
1 stop
LHR14:35London Heathrow
£547
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
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
£575
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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 31 outubro 2025.
Use the filters below to find and compare flights from London Heathrow Airport 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

qua 12/11

07:25-21:54

1 stop18h 29m

San Juan Luis Munoz Marin Intl

ter 18/11

14:33-06:55

1 stop12h 22m

£530

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

sex 21/11

12:20-03:48

1 stop19h 28m

San Juan Luis Munoz Marin Intl

dom 7/12

08:02-20:45

1 stop32h 43m

£533

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

qua 11/3

21:40-17:05

1 stop23h 25m

San Juan Luis Munoz Marin Intl

qua 25/3

18:30-14:35

1 stop16h 05m

£547

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

seg 10/11

08:05-23:59

2 stops19h 54m

San Juan Luis Munoz Marin Intl

ter 18/11

08:10-09:30

2 stops21h 20m

£555

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

sex 21/11

08:05-23:48

1 stop19h 43m

San Juan Luis Munoz Marin Intl

sáb 6/12

05:10-22:00

1 stop12h 50m

£557

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

seg 2/3

21:40-11:35

1 stop17h 55m

San Juan Luis Munoz Marin Intl

ter 3/3

18:30-14:35

1 stop16h 05m

£574

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

qua 21/1

06:40-09:52

3 stops31h 12m

San Juan Luis Munoz Marin Intl

sáb 24/1

06:00-16:25

3 stops30h 25m

£634

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

qua 21/1

13:45-19:21

3 stops33h 36m

San Juan Luis Munoz Marin Intl

sáb 24/1

17:27-07:10

2 stops33h 43m

£644

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

seg 26/1

06:00-10:16

2 stops32h 16m

San Juan Luis Munoz Marin Intl

ter 10/2

11:15-17:30

2 stops26h 15m

£657

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

sex 21/11

12:25-03:17

2 stops18h 52m

San Juan Luis Munoz Marin Intl

sáb 6/12

12:38-15:30

2 stops22h 52m

£666

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 Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport 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 £573.

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 Heathrow Airport to San Juan Luis Munoz Marin Intl Airport is on a Monday when prices can be found for as low as £540. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport for around £658.

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 Heathrow Airport to San Juan Luis Munoz Marin Intl Airport when you can find flight prices for as low as £597. 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 £853 on average. Flights to San Juan Luis Munoz Marin Intl Airport from London Heathrow Airport 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 Heathrow Airport 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 £652 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 Heathrow Airport for as low as £532 on momondo.

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

As of October 2025, prices for London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flights are approximately 8% more expensive when compared to flights at the same time last year.

When to book flights from London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport to San Juan Luis Munoz Marin Intl Airport (LHR to SJU) flight deals and tips

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

Direct flights

None
There are no direct flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport. There are no popular flight routes from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport.
Search flight deals

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

    The straight-line distance from London Heathrow to San Juan Luis Munoz Marin Intl is 4178.9 mi. 14h 05m is a normal flight duration for this route.

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

    Prices for flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport were last updated today.

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

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

    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 Heathrow Airport 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 required for your trip to San Juan Luis Munoz Marin Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at San Juan Luis Munoz Marin Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

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

Compare and see reviews for airlines that fly from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Virgin AtlanticPriceFrom £339Free CancellationRating
7.5
671 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £451Free CancellationRating
7.2
2,906 reviews
Search JetBlue flights
FinnairPriceFrom £458Free CancellationRating
7.6
1,333 reviews
Search Finnair flights
IcelandairPriceFrom £482Free CancellationRating
7.1
562 reviews
Search Icelandair flights
IberiaPriceFrom £515Free CancellationRating
7.0
3,003 reviews
Search Iberia flights
British AirwaysPriceFrom £549Free CancellationRating
6.7
7,488 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?

It is quick and easy to find London to San Juan flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Juan that suits you.

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

All flight searches from London to San Juan on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to San Juan.

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

Price alerts on flights to San Juan from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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