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Cheap flights from London Heathrow Airport to San Juan from £409

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 2/6. 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

Enter your travel dates to find the best prices.
JetBlue Logo
08:40 - 21:32
LHR
-
SJU
17h 52m
1 stop
JetBlue Logo
19:00 - 20:45
SJU
-
LHR
20h 45m
1 stop
£591JetBlue
Tue, 8 Sep - Tue, 22 Sep
JetBlue Logo
08:15 - 17:30
LHR
-
SJU
14h 15m
1 stop
JetBlue Logo
15:24 - 09:30
SJU
-
LHR
13h 06m
1 stop
£611JetBlue
Thu, 4 Jun - Sun, 14 Jun
JetBlue Logo
11:55 - 22:53
LHR
-
SJU
15h 58m
1 stop
JetBlue Logo
15:24 - 09:30
SJU
-
LHR
13h 06m
1 stop
£636JetBlue
Wed, 3 Jun - Sun, 14 Jun
JetBlue Logo
11:55 - 22:53
LHR
-
SJU
15h 58m
1 stop
JetBlue Logo
13:27 - 06:30
SJU
-
LHR
12h 03m
1 stop
£641JetBlue
Thu, 28 May - Thu, 4 Jun
JetBlue Logo
08:40 - 21:42
LHR
-
SJU
18h 02m
1 stop
JetBlue Logo
07:30 - 06:30
SJU
-
LHR
18h 00m
1 stop
£641JetBlue
Tue, 2 Jun - Sat, 6 Jun
JetBlue Logo
08:15 - 19:50
LHR
-
SJU
16h 35m
1 stop
JetBlue Logo
13:00 - 09:30
SJU
-
LHR
15h 30m
1 stop
£644JetBlue
Mon, 7 Sep - Thu, 10 Sep
JetBlue Logo
08:40 - 21:42
LHR
-
SJU
18h 02m
1 stop
JetBlue Logo
07:20 - 06:30
SJU
-
LHR
18h 10m
1 stop
£656JetBlue
Wed, 3 Jun - Wed, 10 Jun
JetBlue Logo
08:15 - 17:46
LHR
-
SJU
14h 31m
1 stop
JetBlue Logo
15:24 - 09:30
SJU
-
LHR
13h 06m
1 stop
£658JetBlue
Fri, 5 Jun - Sun, 14 Jun
JetBlue Logo
08:40 - 21:42
LHR
-
SJU
18h 02m
1 stop
JetBlue Logo
03:30 - 09:30
SJU
-
LHR
25h 00m
1 stop
£659JetBlue
Wed, 3 Jun - Sat, 6 Jun
JetBlue Logo
07:25 - 19:39
LHR
-
SJU
16h 14m
1 stop
JetBlue Logo
07:00 - 06:55
SJU
-
LHR
19h 55m
1 stop
£660JetBlue
Sat, 31 Oct - Wed, 4 Nov

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
5 Jun
LHR08:40London Heathrow
18h 02m
1 stop
SJU21:42San Juan Luis Munoz Marin Intl
12 Jun
SJU06:00San Juan Luis Munoz Marin Intl
19h 30m
1 stop
LHR06:30London Heathrow
£672
TAP AIR PORTUGAL
14 May
LHR08:40London Heathrow
23h 01m
1 stop
SJU02:41San Juan Luis Munoz Marin Intl
22 May
SJU13:27San Juan Luis Munoz Marin Intl
12h 03m
1 stop
LHR06:30London Heathrow
£722
TAP AIR PORTUGAL
22 Oct
LHR11:20London Heathrow
30h 48m
2 stops
SJU13:08San Juan Luis Munoz Marin Intl
31 Oct
SJU06:00San Juan Luis Munoz Marin Intl
26h 40m
2 stops
LHR12:40London Heathrow
£727

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
8 Sept
LHR08:40London Heathrow
17h 52m
1 stop
SJU21:32San Juan Luis Munoz Marin Intl
22 Sept
SJU19:00San Juan Luis Munoz Marin Intl
20h 45m
1 stop
LHR20:45London Heathrow
£591
JetBlue
4 Jun
LHR08:15London Heathrow
14h 15m
1 stop
SJU17:30San Juan Luis Munoz Marin Intl
14 Jun
SJU15:24San Juan Luis Munoz Marin Intl
13h 06m
1 stop
LHR09:30London Heathrow
£611
JetBlue
3 Jun
LHR11:55London Heathrow
15h 58m
1 stop
SJU22:53San Juan Luis Munoz Marin Intl
14 Jun
SJU15:24San Juan Luis Munoz Marin Intl
13h 06m
1 stop
LHR09:30London Heathrow
£636

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 13 May 2026.
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

Cheapest return flight

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 8/9

08:40-21:32

1 stop17h 52m

San Juan Luis Munoz Marin Intl

Tue 22/9

19:00-20:45

1 stop20h 45m

£591
Fastest return journey

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 4/6

08:15-17:30

1 stop14h 15m

San Juan Luis Munoz Marin Intl

Sun 14/6

15:24-09:30

1 stop13h 06m

£611

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 3/6

11:55-22:53

1 stop15h 58m

San Juan Luis Munoz Marin Intl

Sun 14/6

15:24-09:30

1 stop13h 06m

£636

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 28/5

11:55-22:53

1 stop15h 58m

San Juan Luis Munoz Marin Intl

Thu 4/6

13:27-06:30

1 stop12h 03m

£641

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 2/6

08:40-21:42

1 stop18h 02m

San Juan Luis Munoz Marin Intl

Sat 6/6

07:30-06:30

1 stop18h 00m

£641

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 7/9

08:15-19:50

1 stop16h 35m

San Juan Luis Munoz Marin Intl

Thu 10/9

13:00-09:30

1 stop15h 30m

£644

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 3/6

08:40-21:42

1 stop18h 02m

San Juan Luis Munoz Marin Intl

Wed 10/6

07:20-06:30

1 stop18h 10m

£656

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 5/6

08:15-17:46

1 stop14h 31m

San Juan Luis Munoz Marin Intl

Sun 14/6

15:24-09:30

1 stop13h 06m

£658

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 3/6

08:40-21:42

1 stop18h 02m

San Juan Luis Munoz Marin Intl

Sat 6/6

03:30-09:30

1 stop25h 00m

£659

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 31/10

07:25-19:39

1 stop16h 14m

San Juan Luis Munoz Marin Intl

Wed 4/11

07:00-06:55

1 stop19h 55m

£660

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 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 £560.

How far in advance should I book a flight from London Heathrow Airport 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 £657 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 May 2026, prices for London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flights are approximately 21% 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

Fastest flight time

16h 34m

Direct flights

None
The fastest flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport takes 16h 34m
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

Frequently asked questions about flying from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport

  • 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. 16h 34m 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 £329Free CancellationRating
7.4
688 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £430Free CancellationRating
7.1
2,973 reviews
Search JetBlue flights
FinnairPriceFrom £484Free CancellationRating
7.6
1,393 reviews
Search Finnair flights
IcelandairPriceFrom £489Free CancellationRating
7.0
654 reviews
Search Icelandair flights
AviancaPriceFrom £532Free CancellationRating
6.5
2,523 reviews
Search Avianca flights
British AirwaysPriceFrom £534Free CancellationRating
6.7
7,975 reviews
Search British Airways flights
IberiaPriceFrom £588Free CancellationRating
7.0
3,215 reviews
Search Iberia 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
Luquillo

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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