Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from London Heathrow Airport to San Juan from £336

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
06:00 - 02:49LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
24h 49m2 stops Lisbon Humberto Delgado Miami
Multiple Airlines Logo
13:57 - 17:30SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
23h 33m2 stops Miami Lisbon Humberto Delgado
£555Multiple Airlines
Wed, 3 Feb - Wed, 17 Feb
JetBlue Logo
07:25 - 20:48LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
17h 23m1 stop New York John F Kennedy Intl
JetBlue Logo
12:44 - 09:30SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
16h 46m1 stop New York John F Kennedy Intl
£585JetBlue
Wed, 18 Nov - Mon, 23 Nov
Multiple Airlines Logo
12:15 - 10:33LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
26h 18m2 stops Reykjavik Keflavik Intl Miami
Multiple Airlines Logo
03:42 - 19:30SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
35h 48m2 stops Miami Reykjavik Keflavik Intl
£623Multiple Airlines
Sat, 21 Nov - Tue, 24 Nov
Multiple Airlines Logo
09:55 - 11:25LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
29h 30m2 stops Barcelona-El Prat Bogotá El Dorado
Multiple Airlines Logo
18:20 - 14:35SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
16h 15m1 stop Bogotá El Dorado
£626Multiple Airlines
Fri, 22 Jan - Sun, 31 Jan
JetBlue Logo
12:20 - 01:17LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
16h 57m1 stop New York John F Kennedy Intl
JetBlue Logo
12:44 - 09:30SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
16h 46m1 stop New York John F Kennedy Intl
£645JetBlue
Thu, 19 Nov - Tue, 24 Nov
JetBlue Logo
07:25 - 20:48LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
17h 23m1 stop New York John F Kennedy Intl
JetBlue Logo
15:50 - 09:30SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
13h 40m1 stop New York John F Kennedy Intl
£645JetBlue
Wed, 18 Nov - Tue, 24 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 - 18:15SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
16h 40m1 stop Madrid Barajas
£738Iberia
Tue, 2 Feb - Fri, 12 Feb
Iberia Logo
06:10 - 16:40LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
14h 30m1 stop Madrid Barajas
Iberia Logo
18:10 - 17:15SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
19h 05m1 stop Madrid Barajas
£767Iberia
Sun, 21 Feb - Sun, 28 Feb
British Airways Logo
09:15 - 10:38LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
29h 23m2 stops Madrid Barajas Miami
British Airways Logo
15:01 - 08:15SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
13h 14m1 stop Miami
£940British Airways
Tue, 2 Feb - Mon, 1 Mar
British Airways Logo
09:15 - 10:38LHR  London Heathrow-SJU San Juan Luis Munoz Marin Intl
29h 23m2 stops Madrid Barajas Miami
British Airways Logo
15:01 - 08:15SJU  San Juan Luis Munoz Marin Intl-LHR London Heathrow
13h 14m1 stop Miami
£940British Airways
Tue, 2 Feb - Wed, 3 Mar

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
18 Nov
LHR07:25London Heathrow
17h 23m
1 stop
SJU20:48San Juan Luis Munoz Marin Intl
23 Nov
SJU12:44San Juan Luis Munoz Marin Intl
16h 46m
1 stop
LHR09:30London Heathrow
£585
JetBlue
18 Nov
LHR07:25London Heathrow
17h 23m
1 stop
SJU20:48San Juan Luis Munoz Marin Intl
24 Nov
SJU15:50San Juan Luis Munoz Marin Intl
13h 40m
1 stop
LHR09:30London Heathrow
£645
JetBlue
19 Nov
LHR12:20London Heathrow
16h 57m
1 stop
SJU01:17San Juan Luis Munoz Marin Intl
23 Nov
SJU12:15San Juan Luis Munoz Marin Intl
14h 40m
1 stop
LHR06:55London Heathrow
£650

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
17 Nov
LHR20:35London Heathrow
32h 38m
2 stops
SJU01:13San Juan Luis Munoz Marin Intl
24 Nov
SJU05:01San Juan Luis Munoz Marin Intl
25h 49m
2 stops
LHR10:50London Heathrow
£710
Icelandair
10 Nov
LHR20:35London Heathrow
32h 38m
2 stops
SJU01:13San Juan Luis Munoz Marin Intl
9 Dec
SJU14:45San Juan Luis Munoz Marin Intl
24h 45m
2 stops
LHR19:30London Heathrow
£779
Icelandair
11 Nov
LHR12:15London Heathrow
16h 58m
2 stops
SJU01:13San Juan Luis Munoz Marin Intl
24 Nov
SJU05:01San Juan Luis Munoz Marin Intl
25h 49m
2 stops
LHR10:50London Heathrow
£796

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

Wed 3/2

06:00-02:49

2 stops24h 49m

San Juan Luis Munoz Marin Intl

Wed 17/2

13:57-17:30

2 stops23h 33m

£555

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Wed 18/11

07:25-20:48

1 stop17h 23m

San Juan Luis Munoz Marin Intl

Mon 23/11

12:44-09:30

1 stop16h 46m

£585

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Sat 21/11

12:15-10:33

2 stops26h 18m

San Juan Luis Munoz Marin Intl

Tue 24/11

03:42-19:30

2 stops35h 48m

£623

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Fri 22/1

09:55-11:25

2 stops29h 30m

San Juan Luis Munoz Marin Intl

Sun 31/1

18:20-14:35

1 stop16h 15m

£626

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Thu 19/11

12:20-01:17

1 stop16h 57m

San Juan Luis Munoz Marin Intl

Tue 24/11

12:44-09:30

1 stop16h 46m

£645
Fastest return journey

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Wed 18/11

07:25-20:48

1 stop17h 23m

San Juan Luis Munoz Marin Intl

Tue 24/11

15:50-09:30

1 stop13h 40m

£645

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Tue 2/2

09:15-20:00

1 stop14h 45m

San Juan Luis Munoz Marin Intl

Fri 12/2

21:35-18:15

1 stop16h 40m

£738

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Sun 21/2

06:10-16:40

1 stop14h 30m

San Juan Luis Munoz Marin Intl

Sun 28/2

18:10-17:15

1 stop19h 05m

£767

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Tue 2/2

09:15-10:38

2 stops29h 23m

San Juan Luis Munoz Marin Intl

Mon 1/3

15:01-08:15

1 stop13h 14m

£940

LondonSan Juan

LHR London Heathrow - SJU San Juan Luis Munoz Marin Intl

LHRSJU

London Heathrow

Tue 2/2

09:15-10:38

2 stops29h 23m

San Juan Luis Munoz Marin Intl

Wed 3/3

15:01-08:15

1 stop13h 14m

£940

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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?

Prices are currently low for flights on this route.

Typical prices usually range from £599 to £745.
The lowest price recently found on this route was £555.

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 October instead. Flights to San Juan Luis Munoz Marin Intl Airport in October, 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 £735 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 £578 on momondo.

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

As of November 2026, prices for London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flights are approximately 13% 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

£336

Fastest flight time

15h 09m

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 £336. 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 £555.
The fastest flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport takes 15h 09m
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. 15h 09m 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
JetBluePriceFrom £417Free CancellationRating
7.1
3,065 reviews
Search JetBlue flights
IberiaPriceFrom £845Free CancellationRating
7.0
3,240 reviews
Search Iberia flights
British AirwaysPriceFrom £845Free CancellationRating
6.7
8,280 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
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.

An easier way to manage your San Juan Luis Munoz Marin Intl Airport trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 3/12
Thu 10/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to San Juan