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Cheap flights from London Heathrow Airport to San Juan from £369

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from London Heathrow Airport to San Juan

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
09:40 - 23:39LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
17h 59m1 stop Miami
Multiple Airlines Logo
16:52 - 12:35SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
15h 43m1 stop Miami
£538Multiple Airlines
Thu, 29 Oct - Wed, 11 Nov
Multiple Airlines Logo
09:40 - 23:38LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
17h 58m1 stop Miami
Multiple Airlines Logo
16:52 - 12:35SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
15h 43m1 stop Miami
£554Multiple Airlines
Tue, 3 Nov - Tue, 10 Nov
JetBlue Logo
08:05 - 11:26LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
31h 21m1 stop New York John F Kennedy Intl
JetBlue Logo
20:39 - 06:55SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
30h 16m1 stop Boston Logan Intl
£576JetBlue
Fri, 30 Oct - Fri, 6 Nov
JetBlue Logo
09:20 - 01:13LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
19h 53m1 stop Boston Logan Intl
JetBlue Logo
07:00 - 06:55SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
19h 55m1 stop Boston Logan Intl
£577JetBlue
Wed, 4 Nov - Wed, 18 Nov
Iberia Logo
09:15 - 20:00LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
14h 45m1 stop Madrid Barajas
Iberia Logo
21:35 - 14:55SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
13h 20m1 stop Madrid Barajas
£686Iberia
Sat, 13 Feb - Mon, 22 Feb
Iberia Logo
09:15 - 20:00LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
14h 45m1 stop Madrid Barajas
Iberia Logo
18:10 - 10:35SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
12h 25m1 stop Madrid Barajas
£701Iberia
Tue, 17 Nov - Sun, 29 Nov
Icelandair Logo
12:15 - 01:13LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
16h 58m2 stops Reykjavik Keflavik Intl Boston Logan Intl
Icelandair Logo
07:00 - 10:50SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
23h 50m2 stops Boston Logan Intl Reykjavik Keflavik Intl
£724Icelandair
Wed, 4 Nov - Wed, 18 Nov
Icelandair Logo
20:35 - 10:32LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
41h 57m2 stops Reykjavik Keflavik Intl Boston Logan Intl
Icelandair Logo
07:00 - 10:50SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
23h 50m2 stops Boston Logan Intl Reykjavik Keflavik Intl
£759Icelandair
Fri, 30 Oct - Fri, 6 Nov
British Airways Logo
07:30 - 16:40LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
13h 10m1 stop Madrid Barajas
British Airways Logo
21:35 - 14:55SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
13h 20m1 stop Madrid Barajas
£953British Airways
Thu, 12 Nov - Thu, 12 Nov
British Airways Logo
06:30 - 23:54LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
21h 24m2 stops Dublin Philadelphia
British Airways Logo
15:14 - 08:15SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
13h 01m1 stop Miami
£1,021British Airways
Thu, 7 Jan - Thu, 21 Jan

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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
30 Oct
LHR08:05London Heathrow
31h 21m
1 stop
SJU11:26San Juan Luis Munoz Marin Intl
6 Nov
SJU20:39San Juan Luis Munoz Marin Intl
30h 16m
1 stop
LHR06:55London Heathrow
£576
JetBlue
4 Nov
LHR09:20London Heathrow
19h 53m
1 stop
SJU01:13San Juan Luis Munoz Marin Intl
18 Nov
SJU07:00San Juan Luis Munoz Marin Intl
19h 55m
1 stop
LHR06:55London Heathrow
£577
JetBlue
30 Oct
LHR12:20London Heathrow
27h 06m
1 stop
SJU11:26San Juan Luis Munoz Marin Intl
7 Nov
SJU07:00San Juan Luis Munoz Marin Intl
19h 55m
1 stop
LHR06:55London Heathrow
£578

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

Our best British Airways deals on London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flight tickets
British Airways
29 Sept
LHR06:15London Heathrow
19h 32m
2 stops
SJU20:47San Juan Luis Munoz Marin Intl
5 Oct
SJU14:18San Juan Luis Munoz Marin Intl
13h 42m
1 stop
LHR09:00London Heathrow
£1,253
British Airways
28 Sept
LHR06:15London Heathrow
19h 32m
2 stops
SJU20:47San Juan Luis Munoz Marin Intl
5 Oct
SJU14:18San Juan Luis Munoz Marin Intl
13h 42m
1 stop
LHR09:00London Heathrow
£1,304

momondo Fare Finder

 
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 London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Thu 29/10

09:40-23:39

1 stop17h 59m

San Juan Luis Munoz Marin Intl

Wed 11/11

16:52-12:35

1 stop15h 43m

£538

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Tue 3/11

09:40-23:38

1 stop17h 58m

San Juan Luis Munoz Marin Intl

Tue 10/11

16:52-12:35

1 stop15h 43m

£554

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Fri 30/10

08:05-11:26

1 stop31h 21m

San Juan Luis Munoz Marin Intl

Fri 6/11

20:39-06:55

1 stop30h 16m

£576

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Wed 4/11

09:20-01:13

1 stop19h 53m

San Juan Luis Munoz Marin Intl

Wed 18/11

07:00-06:55

1 stop19h 55m

£577

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Sat 13/2

09:15-20:00

1 stop14h 45m

San Juan Luis Munoz Marin Intl

Mon 22/2

21:35-14:55

1 stop13h 20m

£686

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Tue 17/11

09:15-20:00

1 stop14h 45m

San Juan Luis Munoz Marin Intl

Sun 29/11

18:10-10:35

1 stop12h 25m

£700

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Wed 4/11

12:15-01:13

2 stops16h 58m

San Juan Luis Munoz Marin Intl

Wed 18/11

07:00-10:50

2 stops23h 50m

£724

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Fri 30/10

20:35-10:32

2 stops41h 57m

San Juan Luis Munoz Marin Intl

Fri 6/11

07:00-10:50

2 stops23h 50m

£759
Fastest return journey

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Thu 12/11

07:30-16:40

1 stop13h 10m

San Juan Luis Munoz Marin Intl

Thu 12/11

21:35-14:55

1 stop13h 20m

£953

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Thu 7/1

06:30-23:54

2 stops21h 24m

San Juan Luis Munoz Marin Intl

Thu 21/1

15:14-08:15

1 stop13h 01m

£1,021

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

If you aren’t able to travel during the month of February, then book flights to San Juan Luis Munoz Marin Intl Airport from London Heathrow Airport during May instead. Flights to San Juan Luis Munoz Marin Intl Airport in May, while not as cheap as those in February, still average around £595.

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 £739 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 £556 on momondo.

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

As of September 2026, prices for London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flights are approximately 26% 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

£369

Fastest flight time

14h 05m

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 £369. 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 £538.
The fastest flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport takes 14h 05m
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. 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 £332Free CancellationRating
7.4
694 reviews
Search Virgin Atlantic flights
JetBluePriceFrom £416Free CancellationRating
7.1
3,034 reviews
Search JetBlue flights
IcelandairPriceFrom £484Free CancellationRating
6.9
745 reviews
Search Icelandair flights
British AirwaysPriceFrom £843Free CancellationRating
6.7
8,229 reviews
Search British Airways flights
IberiaPriceFrom £890Free CancellationRating
7.0
3,249 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
Fajardo
Dorado
Carolina
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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