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Cheap flights from London Heathrow Airport to San Juan from £381

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 1/9. 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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Find the cheapest flights from London Heathrow Airport to San Juan

Cheap return flights

JetBlue Logo
09:20 - 18:59LHR-SJU
13h 39m1 stop
JetBlue Logo
08:00 - 09:30SJU-LHR
21h 30m1 stop
£483JetBlue
Find Deal
Tue, 4 Nov - Tue, 11 Nov
Icelandair Logo
08:15 - 21:24LHR-SJU
18h 09m1 stop
Icelandair Logo
13:00 - 06:30SJU-LHR
12h 30m1 stop
£487Icelandair
Find Deal
Wed, 3 Sep - Thu, 18 Sep
Icelandair Logo
08:25 - 22:32LHR-SJU
19h 07m2 stops
Icelandair Logo
14:25 - 09:30SJU-LHR
14h 05m1 stop
£491Icelandair
Find Deal
Tue, 9 Sep - Wed, 24 Sep
Icelandair Logo
08:25 - 22:32LHR-SJU
19h 07m2 stops
Icelandair Logo
14:25 - 09:30SJU-LHR
14h 05m1 stop
£493Icelandair
Find Deal
Tue, 9 Sep - Wed, 24 Sep
JetBlue Logo
08:15 - 22:32LHR-SJU
19h 17m1 stop
JetBlue Logo
19:55 - 06:30SJU-LHR
29h 35m1 stop
£495JetBlue
Find Deal
Tue, 9 Sep - Sun, 21 Sep
Icelandair Logo
09:20 - 18:59LHR-SJU
13h 39m1 stop
Icelandair Logo
09:30 - 06:55SJU-LHR
17h 25m2 stops
£496Icelandair
Find Deal
Tue, 4 Nov - Tue, 11 Nov
Avianca Logo
21:40 - 17:05LHR-SJU
23h 25m1 stop
Avianca Logo
13:00 - 14:35SJU-LHR
21h 35m1 stop
£586Avianca
Find Deal
Thu, 6 Nov - Sat, 15 Nov
Avianca Logo
22:05 - 16:50LHR-SJU
23h 45m1 stop
Avianca Logo
18:15 - 15:35SJU-LHR
16h 20m1 stop
£598Avianca
Find Deal
Mon, 8 Sep - Mon, 22 Sep
TAP AIR PORTUGAL Logo
12:25 - 03:17LHR-SJU
18h 52m2 stops
TAP AIR PORTUGAL Logo
16:09 - 15:30SJU-LHR
19h 21m2 stops
£606TAP AIR PORTUGAL
Find Deal
Thu, 6 Nov - Sat, 15 Nov
TAP AIR PORTUGAL Logo
08:15 - 03:17LHR-SJU
23h 02m2 stops
TAP AIR PORTUGAL Logo
15:40 - 15:30SJU-LHR
19h 50m2 stops
£608TAP AIR PORTUGAL
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Thu, 6 Nov - Sat, 15 Nov

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

Our best JetBlue deals on London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flight tickets
JetBlue
4 Nov
LHR09:20London Heathrow
13h 39m
1 stop
SJU18:59San Juan Luis Munoz Marin Intl
11 Nov
SJU08:00San Juan Luis Munoz Marin Intl
21h 30m
1 stop
LHR09:30London Heathrow
£483
Find similar
JetBlue
9 Sept
LHR08:15London Heathrow
19h 17m
1 stop
SJU22:32San Juan Luis Munoz Marin Intl
21 Sept
SJU19:55San Juan Luis Munoz Marin Intl
29h 35m
1 stop
LHR06:30London Heathrow
£495
Find similar
JetBlue
14 Sept
LHR08:15London Heathrow
33h 27m
1 stop
SJU12:42San Juan Luis Munoz Marin Intl
22 Sept
SJU19:55San Juan Luis Munoz Marin Intl
29h 35m
1 stop
LHR06:30London Heathrow
£513
Find similar

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

Our best Icelandair deals on London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flight tickets
Icelandair
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
£487
Find similar
Icelandair
9 Sept
LHR08:25London Heathrow
19h 07m
2 stops
SJU22:32San Juan Luis Munoz Marin Intl
24 Sept
SJU14:25San Juan Luis Munoz Marin Intl
14h 05m
1 stop
LHR09:30London Heathrow
£491
Find similar
Icelandair
9 Sept
LHR08:25London Heathrow
19h 07m
2 stops
SJU22:32San Juan Luis Munoz Marin Intl
24 Sept
SJU14:25San Juan Luis Munoz Marin Intl
14h 05m
1 stop
LHR09:30London Heathrow
£493
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 1 August 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

Tue 4/11

09:20-18:59

1 stop13h 39m

San Juan Luis Munoz Marin Intl

Tue 11/11

08:00-09:30

1 stop21h 30m

£483

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

£487

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 9/9

08:25-22:32

2 stops19h 07m

San Juan Luis Munoz Marin Intl

Wed 24/9

14:25-09:30

1 stop14h 05m

£491

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 9/9

08:25-22:32

2 stops19h 07m

San Juan Luis Munoz Marin Intl

Wed 24/9

14:25-09:30

1 stop14h 05m

£493

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 9/9

08:15-22:32

1 stop19h 17m

San Juan Luis Munoz Marin Intl

Sun 21/9

19:55-06:30

1 stop29h 35m

£495

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 4/11

09:20-18:59

1 stop13h 39m

San Juan Luis Munoz Marin Intl

Tue 11/11

09:30-06:55

2 stops17h 25m

£496

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 6/11

21:40-17:05

1 stop23h 25m

San Juan Luis Munoz Marin Intl

Sat 15/11

13:00-14:35

1 stop21h 35m

£586

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 8/9

22:05-16:50

1 stop23h 45m

San Juan Luis Munoz Marin Intl

Mon 22/9

18:15-15:35

1 stop16h 20m

£598

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 6/11

12:25-03:17

2 stops18h 52m

San Juan Luis Munoz Marin Intl

Sat 15/11

16:09-15:30

2 stops19h 21m

£606

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 6/11

08:15-03:17

2 stops23h 02m

San Juan Luis Munoz Marin Intl

Sat 15/11

15:40-15:30

2 stops19h 50m

£608

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 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 £572.

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 £538. 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 £655.

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 £594. 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 £849 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 £651 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 £517 on momondo.

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

As of August 2025, prices for London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flights are approximately 44% cheaper 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

Best price found

£381

Fastest flight time

13h 39m

Direct flights

None
The best one-way flight to San Juan Luis Munoz Marin Intl Airport from London Heathrow Airport in the past 72 hours is £381. The best return flight deal from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport found on momondo in the last 72 hours is £483.
The fastest flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport takes 13h 39m
There are no direct flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport. Popular non-direct route for this connection is London Heathrow Airport - 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. 13h 39m 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 £349Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £425Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
IcelandairPriceFrom £462Free CancellationRating
7.0
520 reviews
Search Icelandair flights
FinnairPriceFrom £465Free CancellationRating
7.6
1,316 reviews
Search Finnair flights
IberiaPriceFrom £519Free CancellationRating
7.0
2,859 reviews
Search Iberia flights
British AirwaysPriceFrom £546Free CancellationRating
6.6
7,222 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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